Li J, Chen S G, Zhao Y Y, Tan Q
Foshan Occupational Disease Prevention Institute, Foshan 528000, China.
Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi. 2020 Mar 20;38(3):219-221. doi: 10.3760/cma.j.cn121094-20190722-00316.
To instruct a method of determining thallium in the urine by graphite furnace atomic absorption spectrometry(GF-AAS) with colloidal palladium as the matrix modifier. Urine samples were first diluted and then determined by GF-AAS with colloidal palladium while using thermal sample injection. The optimum volume of colloidal palladium was 6 μl and the best ashing temperature was 600-800 ℃ while the atomization temperature was 1700-1900 ℃ . This method showed a good linearity relationship when the concentration between 0.33 and 50.0 μg/L while the correlation coefficient of standard curve line was 0.9992, and the detection limit was 0.33 μg/L and the recovery rate was between 92.7% and 102.3% with the intra-day precision in the range of 2.55% to 3.66% and the inter-day precision in the range of 1.77% to 3.85%. This method has the advantages of low detect limit, high sensitivity and good precision, and it can be used in the biological monitoring and emergency detecting of workers exposed to thallium.
介绍一种以胶体钯为基体改进剂，用石墨炉原子吸收光谱法（GF-AAS）测定尿中铊的方法。尿样先进行稀释，然后采用热进样，用含胶体钯的GF-AAS法进行测定。胶体钯的最佳用量为6 μl，最佳灰化温度为600 - 800℃，原子化温度为1700 - 1900℃。该方法在0.33至50.0 μg/L浓度范围内线性关系良好，标准曲线的相关系数为0.9992，检出限为0.33 μg/L，回收率在92.7%至102.3%之间，日内精密度在2.55%至3.66%范围内，日间精密度在1.77%至3.85%范围内。该方法具有检出限低、灵敏度高、精密度好等优点，可用于铊接触者的生物监测和应急检测。
