用下表所列的方法检测，ARASCO粉不含下列重金属，如铅、汞、镉及砷。
Powder is free of detectable amounts of the following heavy metals, lead, mercury, cadmium and arsenic using the methods stated in the table below.
比对结果表明，干法灰化适合于测定虾粉中总砷的含量，湿法消解测定总砷的含量偏低，微波消解不适合测定虾粉中总砷的含量。
The result obtained by using wet digestion was lower than the actual content. Microwave digestion was not suitable for determination of total arsenic in shrimp powder.
还原所得粗碲粉经亚硫酸钠脱硒，盐酸酸洗除杂处理，硒、砷、锡、铜的脱出率分别达到99%、93%、80%、87.5%，得到含碲99.669%的金属碲粉。
After the treatment with NaSO_3 and hydrochloric acid, 99% Se, 93% As, 80% Sn and 87.5% Cu are removed from the raw powdered-tellurium, and the powders of 99.669% te are prepared.
还原所得粗碲粉经亚硫酸钠脱硒，盐酸酸洗除杂处理，硒、砷、锡、铜的脱出率分别达到99%、93%、80%、87.5%，得到含碲99.669%的金属碲粉。
After the treatment with NaSO_3 and hydrochloric acid, 99% Se, 93% As, 80% Sn and 87.5% Cu are removed from the raw powdered-tellurium, and the powders of 99.669% te are prepared.
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