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Articles 481 - 510 of 642
Full-Text Articles in Food Processing
The Regulation System Of Food Safety In Britain After“Mad Cow Disease” And Its Inspiration——On The International Competitiveness Of British Food, Qin Bao-Qun
Food and Machinery
In practice, the British food processing industry was hit hard after the “Mad Cow Disease” incident, and the British government finally took active measures to promote the transformation of food safety and security system to consumer life and health, and established a strict food safety legal system, established strict food safety legislation and all-round food safety education system. Therefore, observing the food safety supervision system in China by the British food safety supervision system, we can find that there are still problems such as the interference of “localism”, the malady of long management, the proof rule of “who claims who …
Design Of Rock Tea Manipulation System Based On Fuzzy Control, Liu Jiang-Ping, Jin Xin-Yi
Design Of Rock Tea Manipulation System Based On Fuzzy Control, Liu Jiang-Ping, Jin Xin-Yi
Food and Machinery
In order to realize the intelligent control of rock tea processing, reduce the labor intensity and the influence of human factors in the process of manipulate fresh leaves, a control scheme of manipulate fresh leaves based on fuzzy control is proposed. The influence of the environmental factors of temperature and humidity on the quality of rock tea were analyzed, and a fuzzy controller was designed, with the deviation of temperature and humidity as the input parameter and the change value of the process parameter as the output parameter in the expert database. The idea of manual control was simulated, with …
Study On Microwave Vacuum Freeze Drying Technology And Rehydration Characteristics Of Sauerkraut, He Jian, Yi Jun-Peng, Li Xin, Duan Xu, Ren Guang-Yue, Wu Tian-Tian
Study On Microwave Vacuum Freeze Drying Technology And Rehydration Characteristics Of Sauerkraut, He Jian, Yi Jun-Peng, Li Xin, Duan Xu, Ren Guang-Yue, Wu Tian-Tian
Food and Machinery
Using microwave vacuum freeze-drying technology to dehydrate fresh sauerkraut, study the influence of microwave power, vacuum degree and layer thickness on the drying characteristics and rehydration ratio of sauerkraut, determine the best drying conditions, and the low-field nuclear magnetic resonance technology (LF-NMR) was used to study the moisture state of dried pickled cabbage products during rehydration. The results showed that the drying rate of sauerkraut increased with higher microwave power, lower vacuum degree, and smaller thickness of the material layer, and the drying time was shortened. the optimal drying process conditions were found to include microwave power of 320 W, …
Research On Apple Online Classification Based On Machine Vision, Li Qi, Hu Jia-Kun
Research On Apple Online Classification Based On Machine Vision, Li Qi, Hu Jia-Kun
Food and Machinery
Using CCD camera to dynamically collect real-time images of two sides of the apple, a flood filling + adaptive Ostu threshold segmentation algorithm is proposed to extract the outline of the apple. The minimum outer circle method is used to process the upper surface image of the apple to obtain the fruit diameter of the apple. Rectangular method is used to extract the apple's fruit shape features by processing the apple's side surface image; the image is converted from RGB to HSV space to extract the apple's coloring degree, fruit rust, and scar features, and the classification of the SVM …
Design Of Fast Cherry Defect Detection And Recognition System Based On Fpga, Pei Yue-Kun, Gu Yu, Lian Ming-Yue
Design Of Fast Cherry Defect Detection And Recognition System Based On Fpga, Pei Yue-Kun, Gu Yu, Lian Ming-Yue
Food and Machinery
To make the cherry defect detection and identification system meet the real-time requirements, it was proposed to use the convolutional neural network model as the basis and used the SDSoC development platform to complete the design of FPGA for rapid detection and identification of cherry defects. By optimizing data transmission, multiplexing the general matrix multiplication function (GEMM) in the network model and parallelizing the design of the convolution operation, PL-side hardware acceleration was realized. Using the SDSoC platform, a high-level language mapping convolutional neural network model was used on the PS-side, which saved a lot of development time while achieving …
Rapid And Non-Contact Evaluation Of Lipid Oxidation In Fresh Chilled Pork By Near-Infrared Hyperspectral Imaging, He Hong-Ju, Wang Wei, Li Bo, Wang Yu-Ling, Zhu Ya-Dong, Jiang Sheng-Qi, Ma Han-Jun, Chen Fu-Sheng
Rapid And Non-Contact Evaluation Of Lipid Oxidation In Fresh Chilled Pork By Near-Infrared Hyperspectral Imaging, He Hong-Ju, Wang Wei, Li Bo, Wang Yu-Ling, Zhu Ya-Dong, Jiang Sheng-Qi, Ma Han-Jun, Chen Fu-Sheng
Food and Machinery
The lipid oxidation of fresh chilled pork was evaluated rapidly and contactlessly by near-infrared hyperspectral imaging during different storage periods. The Gaussian filter smoothing (GFS), moving average smoothing (MAS), Savitzky-Golay convolution smoothing (SGCS), median filtering smoothing (MFS), multiplicative scatter correction (MSC), standard normal variable (SNV) correction and baseline correction (BC) were used to preprocess the reflectance spectra of the pork samples at 900~1 700 nm. After the seven kinds of pretreatments mentioned above, Partial least squares regression (PLSR) model was established to explore the quantitative relationship between spectral data and the 2-thiobarbituric acid (TBA) value. As a result, the GFS-PLSR …
Optimization Of Aqueous Enzymatic Extraction Process Assisted By High-Temperature Alkaline Liquor Cooking And Steam Explosion For Peony Seed Oil And Its Quality Analysis, Wang Xin, Meng Yu-Qian, Xu Bao-Cheng, Luo Deng-Lin, Fu Yuan-Zhe, Li Meng-Jie, Wei Yu-Hua, Jiao Yu-Man
Optimization Of Aqueous Enzymatic Extraction Process Assisted By High-Temperature Alkaline Liquor Cooking And Steam Explosion For Peony Seed Oil And Its Quality Analysis, Wang Xin, Meng Yu-Qian, Xu Bao-Cheng, Luo Deng-Lin, Fu Yuan-Zhe, Li Meng-Jie, Wei Yu-Hua, Jiao Yu-Man
Food and Machinery
To obtain a higher yield and high quality of peony seed oil, unshelled peony seeds were pretreated with high-temperature alkaline liquor cooking and steam explosion, and the parameters were also optimized. The results were as follows. Firstly, peony seeds were subjected to cook at 105 ℃ for 40 min in an alkaline liquor with the concentration of sodium bicarbonate being 0.05 mol/L, and the material-liquid ratio (g/mL) was 1∶5. Then the precooked peony seeds were further processed by steam explosion with a pressure of 0.3 MPa, holding for 30 s. After pretreating, the enzymolysis efficiency of peony seed powder by …
Study On The Hypolipidemic Function Of Noni Wine, Li Xiao-Juan
Study On The Hypolipidemic Function Of Noni Wine, Li Xiao-Juan
Food and Machinery
Established a mouse model of hyperlipidemia. The male mice were divided into blank control group, low fat group and high fat group, and the low dose, medium dose, high dose of Noni wine. Serum concentrations of total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), respiratory exchange ratio (RER), were measured after 90 days of feeding. The results showed that medium dose and high dose can effectively reduce the body weight or body weight gain of the obese mice, and the testis fat rate, renal fat rate or body fat rate decreased. The serum TC content, …
Extraction Process Optimization Of Saponin From The Leaves Of Camellia Nitidissima Chi And Its Inhibition Of Lipase Activity, Chen Jia-Hui, Wu Xue-Hui
Extraction Process Optimization Of Saponin From The Leaves Of Camellia Nitidissima Chi And Its Inhibition Of Lipase Activity, Chen Jia-Hui, Wu Xue-Hui
Food and Machinery
By using single factor experiment and response surface methods, the effects of ethanol volume fraction, solid-liquid ratio, extraction temperature and time on extracting saponin from the leaves of Camellia nitidissima Chi were discussed, and the inhibitory effect of the extracts on pancreatic lipase was also studied. The optimal extraction conditons for saponin from C. nitidissima Chi were determined as follows: 59% ethanol, 1∶39 (g/mL) as solid-liquid ratio, extracting at 60 ℃ for 124 min. The yield of saponin was 4.82% under the optimized conditions, closing to the predicted result. The research results indicated that the saponin extracted with the mass …
Development And Quality Evaluation Of Compound Rice Noodles Based On Traditional Recipe For Strengthening Spleen Diet, Zhang Jin-Yao, Tan Wen-Gen, Fan Yu-Bing, Zheng Tao, Zeng Yi-Qiong, Zheng Hui, Yang Yong
Development And Quality Evaluation Of Compound Rice Noodles Based On Traditional Recipe For Strengthening Spleen Diet, Zhang Jin-Yao, Tan Wen-Gen, Fan Yu-Bing, Zheng Tao, Zeng Yi-Qiong, Zheng Hui, Yang Yong
Food and Machinery
In order to improve the nutrition and health quality of traditional rice noodles, a special compound rice noodles was developed, using traditional rice noodles technology based on traditional recipe for strengthening spleen diet "Yang chun bai xue cake". In this study, the influence of the amount of single accessories for the recipe (poria cocos, yam, lotus seed, euryales semen) on the quality of rice noodles was used to determine the composition ratio of compound accessories. The amount of compound accessories, xanthan gum and water in the compound rice noodle formula was optimized, and the texture characteristics, product aging degree and …
Optimizing Conditions Of Producing Bacteriocin By Lactobacillus Plantarum M1-Ntg300, An Yu, Wang Ying, Yi Hua-Xi, Zhang Dong-Jie
Optimizing Conditions Of Producing Bacteriocin By Lactobacillus Plantarum M1-Ntg300, An Yu, Wang Ying, Yi Hua-Xi, Zhang Dong-Jie
Food and Machinery
Taking the potency of phytolactin as a characteristic index, the culture conditions for bacteriocin production by Lactobacillus plantarum M1-NTG300 were optimized. Through response surface analysis combined with actual values, the optimal components of the culture medium were determined to include 3.5% glucose concentration, 3.5% peptone, 0.35% Tween 80, and 0.20% magnesium chloride. Under the control of these culture conditions, The titer of bacteriocin, produced by L. plantarum M1-NTG300 was 1 269.4 IU/mL, which was increased by 19.8%.
Effect Of Salt Amount On The Quality Of Chimonobambusa Quadrangularis Shoots Dried By Salt Boiling, Lv Chao-Yan, Gao Zhi-Xi, Liu De-Fen, Jiang Qi, Wang Mi, Ma Yun-Fei, Cai Chun
Effect Of Salt Amount On The Quality Of Chimonobambusa Quadrangularis Shoots Dried By Salt Boiling, Lv Chao-Yan, Gao Zhi-Xi, Liu De-Fen, Jiang Qi, Wang Mi, Ma Yun-Fei, Cai Chun
Food and Machinery
Different amounts of salt (10%, 15%, 20%, 25%, and 30%) were set to cook Chimonobambusa quadrangularis shoots. The effects of salt amount on total sugar, reducing sugar, soluble protein, free amino acid, NaCl, nitrite, as well as moisture content, rehydration ratio, color, sensory score, were studied. The results showed that the water content decreases with the increase of boiling time, showing the salt amount dependent. The rehydration rate increased with the rehydration time, and when it basically stops increasing, the rehydration ratio was 10%＞15%＞20%＞30%＞25% in descending order. The total sugar, reducing sugar, soluble protein, and free amino acid content all …
Optimization Of Aluminum-Free Process For Sweet Potato Powder Producing, Shi Bin, Li Yong-Fu, Long Ming-Xiu, He Yang-Bo, Tian Zhu-Xi, Liang Qian
Optimization Of Aluminum-Free Process For Sweet Potato Powder Producing, Shi Bin, Li Yong-Fu, Long Ming-Xiu, He Yang-Bo, Tian Zhu-Xi, Liang Qian
Food and Machinery
The sweet potato starch was modified by isoamylase, and the natural polysaccharide was used instead of alum as additive to study the process of making sweet potato powder without alum. Moreover, several key factors including water quantity, heating temperature, polysaccharide addition amount and aging time were optimized. The effects of different conditions on the properties of sweet potato starch were examined by using gelatinization characteristic value, gel properties, cooking properties, shear force, breaking rate and tensile force of sweet potato starch as indexes. The results showed that isoamylase could increase amylose content and enhance starch gel properties, and guar gum …
Effects Expansion Process On Tobacco Quality, Chong Li-Min, Lu Yuan, Jiang Guang
Effects Expansion Process On Tobacco Quality, Chong Li-Min, Lu Yuan, Jiang Guang
Food and Machinery
To analyze the chemical composition and aroma composition of tobacco before and after expansion in order to develop a carbon dioxide expansion process for producing high-quality tobacco. The influence of different carbon expansion technology conditions on the physical processing quality and sensory quality of expanded tobacco was determined and the trend of change was determined by the single factor test method. After different temperature of carbon dioxide expansion, HT treatment and drying, the variation trend of tobacco aroma composition and sensory quality were basically the same, but the variation trend of tobacco aroma composition and sensory quality decreased more obviously …
Recent Advances In Microbial Pectinase, Yang Tong-Xiang, Wu Kong-Yang, Bai Yun-Fei, Chen Jun-Liang, Wan Su-Yan, Yang Ru-Meng
Recent Advances In Microbial Pectinase, Yang Tong-Xiang, Wu Kong-Yang, Bai Yun-Fei, Chen Jun-Liang, Wan Su-Yan, Yang Ru-Meng
Food and Machinery
This review covered the advances in the screening of microbial pectinase, breeding technology, some factors affecting pectinase production, enzymatic properties, immobilization, and the development prospects of microbial pectinase were outlined.
Analytical Methods Of Glucosinolate And Its Application In Relative Research In Brassica Oleracea, E Heng-Chao, Zhao Xiao-Yan, Zhang Yan-Mei, Zhou Chang-Yan
Analytical Methods Of Glucosinolate And Its Application In Relative Research In Brassica Oleracea, E Heng-Chao, Zhao Xiao-Yan, Zhang Yan-Mei, Zhou Chang-Yan
Food and Machinery
This study reviews the research advancements of analytical methods with glucosinolates and its application in Brassica oleracea, with a view to providing reference for breeding, nutrition evaluation, and development in B. oleracea.
Application Of Image Recognition Technology In Food Packaging Defect Monitoring, Zhang Hong-Yan, Wang Yong-Zhi, Liu Qing-Hong
Application Of Image Recognition Technology In Food Packaging Defect Monitoring, Zhang Hong-Yan, Wang Yong-Zhi, Liu Qing-Hong
Food and Machinery
The applications of image technology in defect monitoring of three packaging forms of foam plastic packaging, aluminum-plastic blister packaging and rectangular paper packaging were described, and The application trend in food packaging defect monitoring is pre-judgment, which helps the development of China's food packaging industry.
Progress In Preparation And Application Of Double Emulsion, Wen-Hua Xu, Jia Zhang, Zi-Han Wang, Zhuo Jiang, Sheng-Quan Huan, Xian Wu
Progress In Preparation And Application Of Double Emulsion, Wen-Hua Xu, Jia Zhang, Zi-Han Wang, Zhuo Jiang, Sheng-Quan Huan, Xian Wu
Food and Machinery
In this study, the latest research results of droplet microfluidics, membrane emulsification, and coaxial electrospray preparation of double emulsion are introduced, and their advantages and disadvantages are compared and analyzed. The limitation of microfluidic prepared double emulsion industrialization and its related research was pointed out. The latest research results of double emulsion in the fields of food, cosmetics, and biomedicine were reviewed, and the advantages and prospects of double emulsion applications prospected.
The Public Opinion Monitoring, Network Attention And Forecasting The Reference Values Of The Labeled Food Nutrition, Ze-Ying Huang
The Public Opinion Monitoring, Network Attention And Forecasting The Reference Values Of The Labeled Food Nutrition, Ze-Ying Huang
Food and Machinery
Using 1 531 comment data of Sina Weibo and 2 587 of Baidu index data from 2013 to 2020, based on word cloud analysis, text sentiment analysis, and ARIMA-SVM prediction model, based on word cloud analysis, text emotion analysis and ARIMA-SVM prediction model. It was found that residents most concerned about the nutrient reference value of energy, and the nutrient reference value of moon cakes, soy sauce, yuanxiao, milk and other products were more used, especially children's food. In general, the nutrient reference values obtained slightly higher praise, but there were also many controversies; nutrient reference values did not get …
Market Development Status Of Chinese Prepared Food Under The Globalized Epidemic Trends, Pei-Bei Wei, Sui-Jian Qi
Market Development Status Of Chinese Prepared Food Under The Globalized Epidemic Trends, Pei-Bei Wei, Sui-Jian Qi
Food and Machinery
The epidemic situation of new coronavirus infection has become globalized and seemed to be long-term existence, and its prevention and control will become normal. Under the comprehensive situation of resumption of work and production, reopening of school, the intake of sufficient nutrients and the improvement of immunity are personal primary protection against viruses. Prepared foods can be a convenient way to provide dietary nutritious food. Here, we discuss the current situation of the market development of prepared foods in China from the perspective of the human nutrition demand and the convenient supply of dietary nutrients under the long-term trend of …
Differential Proteomics Analysis Of Egg Whites At Different Spray Drying Inlet Temperatures, Li-Li Liu, Sheng-Juan Shi, Ke Chen, Meng-Jun Zhang, Wei-Ming Hao, Yuan-Yuan Li
Differential Proteomics Analysis Of Egg Whites At Different Spray Drying Inlet Temperatures, Li-Li Liu, Sheng-Juan Shi, Ke Chen, Meng-Jun Zhang, Wei-Ming Hao, Yuan-Yuan Li
Food and Machinery
The purpose of this study was to investigate the protein expression of egg white protein at different inlet temperatures of spray drying (140,160,180 ℃). ITRAQ technology was used to identify and bioinformatics egg white proteins, and to investigate the distribution, function and mechanism of different proteins in egg white powder during different drying processes. The results showed that, compared with the control group at 140 ℃, 41 and 46 different proteins were identified at 160 ℃ and 180 ℃ respectively during the spray drying process of egg white (Fold change ＞1.2, P＜0.05). GO function annotation analyzed the biological processes that …
Effect Of Withering Time On Biochemical Components And Volatile Of Tea Leaves From Danxia 8, Xiao-Yan Qiao, Wei Chen, Cheng-Ying Ma, Dong Chen
Effect Of Withering Time On Biochemical Components And Volatile Of Tea Leaves From Danxia 8, Xiao-Yan Qiao, Wei Chen, Cheng-Ying Ma, Dong Chen
Food and Machinery
The comparative analysis was performed for the biochemical components, and volatile of tea leaves from Danxia 8 treated at different withering time. The regularity of biochemical characteristics and aroma profile were expected to find out by statistical methods. The results showed that tea polyphenols increased significantly from 0 h to 23 h, and then decreased significantly. The content of free amino acids increased significantly from 0 h to 16 h, while theanine decreased remarkably. The contents of free amino acids and theanine decreased significantly in the next time. At the whole withering process, caffeine content increased significantly, but theobromine decreased …
Effects Of Different Soybean Powder On Farinograph And Gelatinization Characteristics Of Wheat Flour, Jing-Hong Shi, Shu-Wen Guo, Yun-Ling Li, Xiao-Bing Zhu
Effects Of Different Soybean Powder On Farinograph And Gelatinization Characteristics Of Wheat Flour, Jing-Hong Shi, Shu-Wen Guo, Yun-Ling Li, Xiao-Bing Zhu
Food and Machinery
The soybean powder and wheat powder were mixed in different proportions, and the effect of different soybean powder on the farinograph and gelatinization characteristics of wheat powder were analyzed using Mixolab hybrid experiment instrument and rapid viscosity analyzer. The result showed that as the amount of soybean powder added increased, the stabilization time and formation time of the dough reduced, the weakening degree of dough protein increased, and peak viscosity, the trough viscosity, final viscosity, and regenerative value continued to decrease. The C2 value, peak viscosity, trough viscosity, final viscosity, gelatinization temperature and gelatinization time were significantly negatively correlated(P＜0.05) with …
Whole Genome Analysis And Molecular Traceability Study Of Salmonella In Fresh Livestock And Poultry Meat, Sheng Song, Han Gao, Li Yan, Kun-Peng Guo, Hai-Yun Zhang, Fang-Bin Wang
Whole Genome Analysis And Molecular Traceability Study Of Salmonella In Fresh Livestock And Poultry Meat, Sheng Song, Han Gao, Li Yan, Kun-Peng Guo, Hai-Yun Zhang, Fang-Bin Wang
Food and Machinery
In order to investigate the contamination status of Sal-monella in fresh pork and fresh chicken, and research its whole genome characteristics and molecular traceability, the laboratory randomly collected 24 fresh pork and 27 fresh chicken from the fresh market in Changsha, were inspected according to “National Food Safety Standard Food microbiological examination: Salmonella” GB 4789.4—2016. The results showed that in 24 randomly selected fresh pork, 20 samples were detected, with the detection rate of 83.3%; in 27 randomly selected fresh chicken, 20 samples were detected, and the detected rate is 74.1%; the total detection rate was 78.4%. The results …
Determination Of Vancomycin Antibiotics Residues In Animal Derived Food By Solid Phase Extraction And High Performance Liquid Chromatography-Tandem Mass Spectrometry, Jin Lin, Xiao-Long Fan, Feng Jiang, Qing-Zhi Peng, Tao-Hong Zhou
Determination Of Vancomycin Antibiotics Residues In Animal Derived Food By Solid Phase Extraction And High Performance Liquid Chromatography-Tandem Mass Spectrometry, Jin Lin, Xiao-Long Fan, Feng Jiang, Qing-Zhi Peng, Tao-Hong Zhou
Food and Machinery
A accurate and quantitative method was developed for the determination of vancomycin antibiotics residues in animal food by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The samples were extracted by formic acid acetonitrile solution, degreased by acetonitrile-saturated n-hexane, purified by cation solid-phase extraction column, detected in the multi reaction monitoring (MRM) positive ion mode, and quantified by internal standard method using didechloro vancomycin as internal standard. The results showed that the target of vancomycin and norvancomycin had a good linear relationship in the range of 20~200 μg/L, and the correlation coefficient (R2) could reach more than 0.997. The …
Research On The Application Of Three-Step Hybrid Variable Selection Strategy In Chicken Moisture Detection By Near Infrared, Kai Yuan, Zhi-Yong Zhang, Qian Xi, Ying-Rui Wu, Dong-Sheng Guo, Guo-Kang He
Research On The Application Of Three-Step Hybrid Variable Selection Strategy In Chicken Moisture Detection By Near Infrared, Kai Yuan, Zhi-Yong Zhang, Qian Xi, Ying-Rui Wu, Dong-Sheng Guo, Guo-Kang He
Food and Machinery
Based on the three-step hybrid strategy of effective variable selection (rough selection, fine selection and optimal selection) in multivariate calibration of spectra, a feature variable selection method combining interval partial least squares (iPLS), interval variable iterative space shrinkage approach (iVISSA) and iteratively retaining informative variables (IRIV) was proposed to select the feature wavelengths of the near-infrared spectra of fresh chicken breast,and established a chicken moisture detection model. The number of modeled wavelengths was reduced by 0.76% after iPLS-iVISSA-IRIV, but the accuracy were stability of the model are gradually improved. The modeling results using the selected 8 characteristic wavelengths were as …
Study On The Standardized Method Of Key Supervision Data For Safe Production Of Instant Rice, Xiao-Juan Wu, Dong Xu, Jie Dong, Wei Wu
Study On The Standardized Method Of Key Supervision Data For Safe Production Of Instant Rice, Xiao-Juan Wu, Dong Xu, Jie Dong, Wei Wu
Food and Machinery
The entire industrial chain of instant rice production, including paddy planting, paddy storage, rice processing, instant rice processing, instant rice storage and sales, etc., was analyzed to select the main links and critical control points. The detection objects, main indicators and main hazard factors, such as pollutants, mycotoxins, food additives, microbiological indicators, etc., of important links and critical control points were determined. A relatively complete key supervision database structure for the safe production of instant rice has been gradually formed. The key supervision database for the safe production of instant rice included regulation sets, method sets and data sets. The …
Simultaneous Determination Of 8 Adipate Plasticizers In Infant Formula By Isotope Dilution-Gas Chromatography-Mass Spectrometry, Yong-Hui Huang
Simultaneous Determination Of 8 Adipate Plasticizers In Infant Formula By Isotope Dilution-Gas Chromatography-Mass Spectrometry, Yong-Hui Huang
Food and Machinery
A method was developed for the simultaneous determination of 8 adipate plasticizers in infant formula by isotope dilution-gas chromatography-mass spectrometry (GC-MS). With the infant formula sample completely dissolved in water, n-hexane was used as the extraction solvent. After ultrasonic extraction, qualitative and quantitative analysis were carried out by GC-MS in selected ion monitoring modes. The correlation coefficients (R2) of 8 adipate plasticizers were over 0.999, The limits of detection (LODs) were 0.08~0.12 mg/kg and the limits of quantification(LODs) were 0.2~0.4 mg/kg. The average recoveries of 8 adipate plasticizers in milk powder were ranged from 94.8% to 103.3%. In …
Evaluation Of Uncertainty In Chemical Analysis Laboratory Using Control Chart, Jing Li, Xin-Xin Xiao, Xian-Jin Guo
Evaluation Of Uncertainty In Chemical Analysis Laboratory Using Control Chart, Jing Li, Xin-Xin Xiao, Xian-Jin Guo
Food and Machinery
According to the test method of GB/T 5750.6—2006, the cadmium content in drinking water was measured by graphite furnace atomic absorption spectroscopy, and the accumulated data was statistically analyzed based on the Top-down control chart method. The extended uncertainty was 0.30 μg/L (k=2,P=95%). Using Top-down control chart method to assess the uncertainty is statistically rigorous, and has a wide range of application prospects.
Detection And Analysis Of Sulfonamides Residues In Meat Poultry In Hunan Province, Jun Xiang, Wan-Li Tang, Hui Liu, Hong-Qing Zhao
Detection And Analysis Of Sulfonamides Residues In Meat Poultry In Hunan Province, Jun Xiang, Wan-Li Tang, Hui Liu, Hong-Qing Zhao
Food and Machinery
To understand the residues of sulfonamides in meat poultry in Hunan, providing basis for expanding the application of detection methods of sulfonamide residues and strengthening the quality and safety supervision of meat poultry products, the ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) method was optimized for the simultaneous determination of 10 kinds of sulfonamide residues in meat poultry. The residues of sulfonamides in more than 300 batches of meat poultry samples produced and sold in various regions of Hunan Province were analyzed. The detection results of actual samples showed that the detection rate of trimethoprim was the highest among the …