Comparison of reflux and microwave oven digestion for the determination of arsenic and selenium in sludge reference material using flow injection hydride generation and atomic absorption spectrometry

The Analyst ◽  
1995 ◽  
Vol 120 (1) ◽  
pp. 95 ◽  
Author(s):  
Rajananda Saraswati ◽  
Thomas W. Vetter ◽  
Robert L. Watters
Keyword(s):  
Reference Material ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flow Injection ◽  
Hydride Generation ◽  
Absorption Spectrometry ◽  
Microwave Oven

Determination of Total Arsenic and Selenium in Soils and Plants by Atomic Absorption Spectrometry with Hydride Generation and Flow Injection Analysis Coupled Techniques

1996 ◽  
Vol 79 (3) ◽  
pp. 764-768 ◽  
Author(s):  
Oroncio Jiménez De Blas ◽  
N Rodriguez Mateos ◽  
A Garcia Sanchez
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flow Injection ◽  
Flow Injection Analysis ◽  
Hydride Generation ◽  
Absorption Spectrometry ◽  
Sample Treatment ◽  
Total Arsenic ◽  
Relative Standard

Abstract A procedure has been developed for determination of total arsenic and selenium in soils and plants by atomic absorption spectrometry with hydride generation associated with flow injection analysis (FIA-AAS-HG). Samples were wet-digested by using 2 systems: heating in a metal digestion block with controlled temperature and time and heating in a microwave oven. Total arsenic and selenium were reduced with NaBH4 and concentrated HCI, respectively. In both digestion systems used for the 2 matrix types, detection limits below 1 μg/L were found for both elements for an injection volume of 160 μL, with relative standard deviations of 3–6%. Recoveries by the method ranged from 93 to 105%; with the reference materials FD8 and MRG-1, the values obtained in all cases were consistent with the certified data. The FIA-AAS-HG procedure is highly suitable for determination of total arsenic and selenium in soils and plants, and because of the coupled system used, it is an improvement over other procedures in terms of sample treatment, sample consumption, and automation.

scholarly journals Determination of Inorganic Arsenic in Marine Food Samples by Hydrochloric Acid Distillation and Flow-Injection Hydride-Generation Atomic Absorption Spectrometry

1999 ◽  
Vol 82 (5) ◽  
pp. 1217-1223 ◽  
Author(s):  
Joar Karsten Øygard ◽  
Anne-Katrine Lundebye ◽  
Kåre Julshamn
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flow Injection ◽  
Biological Samples ◽  
Certified Reference Materials ◽  
Hydride Generation ◽  
Absorption Spectrometry ◽  
Fish Fillet ◽  
Inorganic As

Abstract A simple, rapid, and reliable method was developed for determination of inorganic As in biological samples such as fish fillet. Inorganic AS was distilled from the sample as AsCl3 with HCI. The separated inorganic AS was determined by flow-injection hydride-generation atomic absorption spectrometry after prereduction with Kl and HCI. The influences of various concentrations of Kl, ascorbic acid, and HCI in the prereduction stage; NaBH4 as the reductant; and HCI as the carrier solution on analytical results were studied. Digestion was performed in a Kjeldahl digestion system for 75 min with 4 mL nitric acid and 1 mL sulfuric acid at 380°C. The concentrations of inorganic As in samples were less than 0.1 mg/kg dry weight for fish fillet and somewhat higher for crustaceans and bivalve molluscs. The total and inorganic As contents of various marine biological samples and certified reference materials were determined.

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