Zobrazeno 1 - 10
of 21
pro vyhledávání: '"G. K-C. Low"'
Autor:
G. K.-C. Low, X. J. Yang
Publikováno v:
Environmental Chemistry Letters. 7:381-387
Due to chloride polyatomic interferences, hydrochloric acid is not recommended for preparation of samples analysed by ICP-MS and separate digestion procedures are used for ICP-MS and ICP-AES. Here we demonstrate that a single digestion procedure usin
Autor:
G. K.-C. Low, X. J. Yang
Publikováno v:
Accreditation and Quality Assurance. 10:565-573
The accurate determination of method detection limits (MDLs) for acid extractable metals in environmental solid samples (soils, sediments and solid wastes) has been shown to be difficult because not only is it difficult to obtain a representative ref
Publikováno v:
The Analyst. 127:315-318
The low recovery of silver in the analysis of environmental water samples has been experienced for a long time. The major cause was postulated to be due to chloride in the sample that causes precipitation of silver chloride. A modified procedure in w
Publikováno v:
Communications in Soil Science and Plant Analysis. 31:2185-2200
Facilitated by advances in analytical chemistry, soil, plant and water analysis now play a key role in the qualitative and quantitative characterisation of the environment. Ecological and health risk assessments can predict probabilities and risks of
Autor:
G. K.-C. Low, A. M. Duffield
Publikováno v:
Organic Mass Spectrometry. 20:595-599
Further studies have demonstrated that the site-specific hydrogen transfer process involved in the formation of the m/z 145 anion of β-hydroxyamine pentafluoropropionate (PFP) derivatives observed under electron capture negative ion chemical ionizat
Publikováno v:
Chromatographia. 15:289-296
In the determination of ephedrine using reversed-phase, ion-pair liquid chromatography, a chromatographically pure sample was observed to give three peaks under certain mobile phase conditions. The mobile phases which produced maximum peak splitting
Publikováno v:
Journal of Chromatography B: Biomedical Sciences and Applications. 336:15-24
A simple retention model is advanced to explain the observation that a chromatographically pure solute can produce up to three discrete peaks under suitable mobile-phase conditions in reversed-phase, ion-pair high-performance liquid chromatography. T
Publikováno v:
Environmental Technology Letters. 9:1361-1366
The rates of photochemical decomposition of arsenic(III), dimethylarsinic acid (DMA), monomethylarsonic acid (MMA) and arsenobetaine have been studied in both aerated and deaerated distilled water and seawater. In distilled water, the ultimate produc
Publikováno v:
Journal of Chromatography A. 254:123-132
When nickel dithiocarbamate complexes derived from aromatic amines were reacted with mercury(II) or silver(I) ions, they did not undergo the expected simple exchange reaction wherein the corresponding mercury or silver complexes are formed. Instead,
Publikováno v:
Biological Mass Spectrometry. 13:95-104
This study reports studies using electron capture negative ion chemical ionization gas chromatography/mass spectrometry (EC-NICI GC/MS) of 21 polycyclic aromatic hydrocaroon (PAH) compounds. The selectivity and sensitivity of these compounds are show