Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Flow injection analysis (2)
- Manifold design (2)
- Sensitivity (2)
- Alternating variable search optimisation (1)
- Analytical (1)
-
- Atorniser (1)
- Chemistry (1)
- Chloride determination (1)
- Dispersion coefficient (1)
- Double-line manifold (1)
- Inductively coupled plasma atomic fluorescence spectrometry (1)
- Inductively coupled plasma optical emission spectrometry (1)
- Modern (1)
- Noise (1)
- Simplex method (1)
- Source inductively coupled plasmas in atomic fluorescence spectrometry (1)
- Throughput (1)
- Well-stirred tank model (1)
Articles 1 - 4 of 4
Full-Text Articles in Physical Sciences and Mathematics
Modern Analytical Chemistry, Julian Tyson
Modern Analytical Chemistry, Julian Tyson
Chemistry Department Faculty Publication Series
No abstract provided.
Comparison Of Alternating Variable Search And Simple Methods Of Optimisation For Inductively Coupled Plasma Optical Emission And Atomic Fluorescence Spectrometry, Stanley Greenfield, Mahmood S. Salman, Maryanne Thomsen, Julian Tyson
Comparison Of Alternating Variable Search And Simple Methods Of Optimisation For Inductively Coupled Plasma Optical Emission And Atomic Fluorescence Spectrometry, Stanley Greenfield, Mahmood S. Salman, Maryanne Thomsen, Julian Tyson
Chemistry Department Faculty Publication Series
The performance of several cyclic alternating variable search (AVS) optimisation methods are compared with two simplex methods with respect to the number of changes of variable required to search a model two-factor response space. The roles of the initial step size and of the variable step size are discussed, and the information produced concerning the shape of the factor space is evaluated. An AVS method which starts with a fixed step size and then changes to a variable step size on second and subsequent cycles is compared with a variable step size simplex for the optimisation of an inductively coupled …
The Design Of Flow Injection Manifolds To Give The Best Detection Limits For Methods Involving On-Line Chemical Derivatisation Part 1. Theoretical Basis For High Sensitivity, Julian Tyson
Chemistry Department Faculty Publication Series
The criteria to be considered when designing a flow-injection manifold for the highest sensitivity for a method based on measurement of the peak height corresponding to a derivative formed on-line between the injectate and a reagent. These criteria include the ratio of reagent concentration to determinand concentration at the peak maximum, the concentration of the top standard and the reagent composition. These three parameters can be combined to give a single parameter referred to as the a-value being the ratio of the determinand to reagent dispersion coefficients at the peak maximum for the top standard. It is shown, on the …
The Design Of Flow Injection Manifolds To Give The Best Detection Limits For Methods Involving On-Line Chemical Derivatisation Part 2. The Spectrophotometric Determination Of Chloride, Julian Tyson, A. G. Fogg, X. Wang
The Design Of Flow Injection Manifolds To Give The Best Detection Limits For Methods Involving On-Line Chemical Derivatisation Part 2. The Spectrophotometric Determination Of Chloride, Julian Tyson, A. G. Fogg, X. Wang
Chemistry Department Faculty Publication Series
The optimisation of a flow injection manifold for the spectrophotometric determination of chloride is described. Factors contributing to the baseline noise due to refractive index and reagent absorption effects are removed by a combination of design features. Firstly, a double-line manifold is used; secondly, pulse-dampers and a packed bed reactor are incorporated into the flow lines and thirdly a delay coil is introduced to resolve the valve switching peaks from the determinand peaks. The appropriate conditions for obtaining the maximum sensitivity are found from an off-line experiment and the guidelines established on the basis of the well-stirred tank model for …