On the atomic absorption determination of arsenic

• Published in: Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi) Vol. 15; no. 6; pp. 469 - 474_1
• Main Authors: Ebato, K, Amakawa, E, Yamanobe, H, Suzuki, S, Totani, T. (Tokyo-to. Research Lab. of Public Health (Japan))
• Format: Journal Article
• Language: English; Japanese
• Published: Japanese Society for Food Hygiene and Safety 1974
• ISSN: 0015-6426; 1882-1006; 1882-1006
• DOI: 10.3358/shokueishi.15.469

Analytical optimum condition for the determination of arsenic by introducing arsine into an atomic absorption spectrophotometer system equipped with an argon-hydrogen flame was examined. The optimum concentrations of reagents in the prepared solution were 3-5N hydrochloric acid, 0.5-2.0% potassium iodide and 0.1-1.0% stannous chloride. The addition of 0.8-2.0g of zinc powder to 20ml of prepared solution was enough to obtain the highest absorbance of arsenic under 0.5kg/cm2 of arsine gas pressure. The absorbance of arsenic was decreased according to the acidity raised by sulfuric acid residue in prepared solution, but recovered by neutralization with ammonia water. The absorbance was interfered with over 5μg of Se4+ and over 500μg of Sb3+ added to the 20ml of prepared solution containing 1μg of arsenic.