Hydride-generating atomic absorption

This experiment describes a fixed-size simplex optimization of a system involving four factors. The goal of the optimization is to maximize the absorbance of As by hydride generation atomic absorption spectroscopy using the concentration of HCl, the N2 flow rate, the mass of NaBH4, and reaction time as factors. 

FLOW INJECTION ELECTROCHEMICAL HYDRIDE GENERATION ATOMIC ABSORPTION SPECTROMETRY EOR THE DETERMINATION OE ARSENIC... 

Vol. 130. Hydride Generation Atomic Absorption Spectrometry. By Jiri Dedina and Dimiter L. Tsalev... 

Zhang X, Cornelis R, De Kimpe J, and Mees L (1996) Arsenic speciation in serum of uraemic patients based on liquid chromatography with hydride generation atomic absorption spectrometry and on-line UV photo-oxidation digestion. Anal Chim Acta 319 177-185. 

Munoz O, Velez D, Montoro R (1999) Optimization of the solubilization, extraction and determination of inorganic arsenic [As(III) i- As(V)] in seafood products by acid digestion, solvent extraction and hydride generation atomic absorption spectrometry. Analyst 124 601-607. 

Samanta G, Chakraborti D. 1996. Flow injection hydride generation atomic absorption spectrometry (FI-HG-AAS) and spectrophotometric methods for determination of lead in environmental samples. Environmental Technology 17(12) 1327-1337. 

Hydride Generation Atomic Absorption Spectrometry High Performance Liquid Chromatography High Performance Thin-Layer Chromatography High Resolution... 

Sturgeon et al. [59] have described a hydride generation atomic absorption spectrometry method for the determination of antimony in seawater. The method uses formation of stibene using sodium borohydride. Stibine gas was trapped on the surface of a pyrolytic graphite coated tube at 250 °C and antimony determined by atomic absorption spectrometry. An absolute detection limit of 0.2 ng was obtained and a concentration detection limit of 0.04 pg/1 obtained for 5 ml sample volumes. 

Negative interferences by transition metal cations such as nickel and copper and nitrite were observed. However, these interferences have also been reported for the hydride generation atomic absorption method, and are due to... 

It has been reported that the differential determination of arsenic [36-41] and also antimony [42,43] is possible by hydride generation-atomic absorption spectrophotometry. The HGA-AS is a simple and sensitive method for the determination of elements which form gaseous hydrides [35,44-47] and mg/1 levels of these elements can be determined with high precision by this method. This technique has also been applied to analyses of various samples, utilising automated methods [48-50] and combining various kinds of detection methods, such as gas chromatography [51], atomic fluorescence spectrometry [52,53], and inductively coupled plasma emission spectrometry [47]. 

Lee [2] using a hydride generation atomic absorption spectrometric method has investigated the bioaccumulation of bismuth on marine sediment samples collected in Narragensett Bay and the North Pacific Ocean. 

A mass, mflsh, is weighed, digested in hot acid for 30 minutes, and then the solution is made up to a volume, V. This solution is analyzed by hydride generation atomic absorption (AA). The equation describing the concentration of mercury in a fish can be written... 

M. H. Arbab-Zavar, M. Chamsaz, A. Youssefi and M. Aliakbari, Electrochemical hydride generation atomic absorption spectrometry for determination of cadmium. Anal. Chim. Acta, 546(1), 2005, 126-132. 

J. M. Trindade, A. L. Marques, G. S. Lopes, E. P. Marques and J. Zhang, Arsenic determination in gasoline by hydride generation atomic absorption spectroscopy combined with a factorial experimental design approach. Fuel, 85(14-15), 2006, 2155-2161. 

X. Ch. Le, W. R. Cullen, K. J. Reimer and 1. D. Brindie, A new continous hybride generator for the determination of arsenic, antimony and tin by hydride generation atomic absorption spectrometry. Anal. Chim. Acta, 258(2), 1992, 307-315. 

R. B. Georgieva, P. K. Petrov, P. S. Dimitrov and D. L. Tsalev, Observations on toxicologically relevant arsenic in urine in adult offspring of families with Balkan endemic nephropathy and controls by batch hydride generation atomic absorption spectrometry, Int. J. Environ. Anal. Chem., 87(9), 2007, 673-685. 

Samanta, G Chowdhury, T.R., Mandal, B.K. et al. (1999) Flow injection hydride generation atomic absorption spectrometry for determination of arsenic in water and biological samples from arsenic-affected districts of West Bengal, India, and Bangladesh. Microchemical Journal, 62(1), 174-91. 

Manning, B.A. and Martens, D.A. (1997) Speciation of arsenic(III) and arsenic(V) in sediment extracts by high- performance liquid chromatography-hydride generation atomic absorption spectrophotometry. Environmental Science and Technology, 31(1), 171-77. 

Cano-Aguilera, I., Haque, N., Morrison, G.M. et al. (2005) Use of hydride generation-atomic absorption spectrometry to determine the effects of hard ions, iron salts and humic substances on arsenic sorption to sorghum biomass. Microchemical Journal, 81(1), 57-60. 

ASTM D-4606. Standard Test Method for Determination of Arsenic and Selenium in Coal by the Hydride Generation/Atomic Absorption Method. 

In an interlab oratory study involving 160 accredited hazardous materials laboratories reported by Kimbrough and Wakakuwa [28], each laboratory performed a mineral acid digestion on five soils spiked with arsenic, cadmium, molybdenum, selenium and thallium. Analysis of extracts was carried out by atomic emission spectrometry, inductively-coupled plasma mass spectrometry, flame atomic absorption spectrometry and hydride generation atomic absorption spectrometry. 

Martens and Suarez [37 ] employed sequential extraction and hydride generation atomic absorption spectrometry to analyse soil for arsenic and selenium and achieved excellent precision. 

Jiminez de Bias et al. [32] have reported a method for the determination of total arsenic in soils based on hydride generation atomic absorption spectrometry and flow injection analysis. The method gave good recoveries and had a detection limit below 1 ig/l for an injection volume of 160 pi... 

Martens et al. [202] and McCurdy et al. [203] have employed hydride generation atomic absorption spectrometry and inductively coupled plasma mass spectrometry, respectively, to determine selenium in soils. 

Hydride generation atomic absorption spectrometry has been used to determine arsenic species in water [ 1 ]. 

Mohammad, B., Ure, A.M., Reglinski,J. and Littlejohn, D. (1990) Speciation of antimony in natural waters the determination of Sb(III) and Sb(V) by continuous flow hydride generation-atomic absorption spectrometry. Chem. Spec. Bioavail., 3, 117-122. 

Blaylock, M.L. and James, B.R. (1993) Selenite and selenate quantification by hydride generation - atomic absorption spectrometry, ion chromatography and colorimetry, /. Environ. Qual., 22, 851-857. 

---