Soares M E, Bastos M L, Ferreira M
CEQUP, Faculty of Pharmacy, Rua Aníbal Cunha, Oporto, Portugal.
Analyst. 1995 Sep;120(9):2367-70. doi: 10.1039/an9952002367.
This paper describes an ETAAS method to quantify residues of arsenic, cadmium and lead in porcine and bovine kidneys. The results of a survey conducted during 1993 are tabulated. Analysis was performed by ETAAS with a stabilized-temperature platform furnace. The determinations were performed in the linear ranges 0.5-150, 0.04-2.0 and 1.1-75 micrograms l-1 for As, Cd and Pb, respectively, in the acid digests which were obtained under controlled conditions of temperature in a tetrafluoroethylene apparatus after appropriate dilution and addition of a suitable chemical modifier. Extensive quality assurance of the methods was performed by the standard additions method and by comparison with a certified reference material. The precision was better than 9.9, 8.5 and 9.2% for As, Cd and Pb, respectively. Low relative standard deviations of 7.4, 7.0, and 2.8% for As, Cd and Pb, respectively, were obtained by comparing the levels found in the kidney reference material and the certified values, showing this method to be satisfactory and suitable for routine analysis. The mean levels of As, Cd and Pb in porcine kidney were 2.11 (1.11-5.49), 0.81 (0.02-4.22) and 0.18 (0.02-0.42) microgram g-1 respectively. Those in the adult bovine kidney were 1.77 (0.42-3.42), 1.26 (0.01-6.16) and 0.73 (0.19-2.55) microgram g-1, respectively, and in the young bovine kidney they were 1.33 (0.61-2.56), 0.49 (0.15-1.82) and 0.20 (0.12-0.29) microgram g-1.
本文描述了一种用石墨炉原子吸收光谱法（ETAAS）测定猪肾和牛肾中砷、镉和铅残留量的方法。文中列出了1993年开展的一项调查结果。分析采用配备稳定温度平台炉的石墨炉原子吸收光谱法进行。分别在0.5 - 150、0.04 - 2.0和1.1 - 75微克/升的线性范围内对砷、镉和铅进行测定，这些线性范围是在四氟乙烯仪器中，于控制温度条件下对样品进行适当稀释并添加合适的化学改性剂后，从酸消解液中测得的。通过标准加入法并与有证标准物质进行比较，对这些方法进行了广泛的质量保证。砷、镉和铅的精密度分别优于9.9%、8.5%和9.2%。通过比较肾标准物质中测得的含量与认定值，砷、镉和铅的相对标准偏差分别低至7.4%、7.0%和2.8%，表明该方法令人满意且适用于常规分析。猪肾中砷、镉和铅的平均含量分别为2.11（1.11 - 5.49）、0.81（0.02 - 4.22）和0.18（0.02 - 0.42）微克/克。成年牛肾中砷、镉和铅的平均含量分别为1.77（0.42 - 3.42）、1.26（0.01 - 6.16）和0.73（0.19 - 2.55）微克/克，幼牛肾中砷、镉和铅的平均含量分别为1.33（0.61 - 2.56）、0.49（0.15 - 1.82）和0.20（0.12 - 0.29）微克/克。
