Determination of trace gallium by graphite furnace atomic absorption spectrometry in urine

VernacularTitle:尿中痕量镓测定的石墨炉原子吸收光谱法
Author: Lezhou ZHOU ¹ ; Sheng FU ; Shouquan GAO ; Guowen HE
Author Information

1. 湖南省职业病防治院
Keywords: Graphite furnace atomic absorption (GFAAS); Urine; Gallium; Ammonium dihydrogen phosphate
From: Chinese Journal of Industrial Hygiene and Occupational Diseases 2016;34(6):465-467
CountryChina
Language:Chinese
Abstract: Objective To establish a method for determination trace gallium in urine by graphite furnace atomic absorption spectrometry (GFAAS).Methods The ammonium dihydrogen phosphate was matrix modifier.The temperature effect about pyrolysis (Tpyr) and atomization temperature were optimized for determination of trace gallium.The method of technical standard about within-run,between-run and recoveries of standard were optimized.Results The method showed a linear relationship within the range of 0.20～80.00 μg/L(r=0.998).The within-run and between-run relative standard deviations (RSD) of repetitive measurement at 5.0,10.0,20.0 μg/L concentration levels were 2.1％～5.5％ and 2.3％～3.0％.The detection limit was 0.06 μg/L.The recoveries of gallium were 98.2％～101.1％.Conclusion This method is simple,low detection limit,accurate,reliable and reproducible.It has been applied for determination of trace gallium in urine samples those who need occupation health examination or poisoning diagnosis.