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试样经四酸溶解,蒸干,采用3%盐酸+硼酸+硫酸钠混合液代替王水提取,用火焰原子吸收法进行测定,使测定的灵敏度大为提高,方法检测限为3.12ug/g。
The sample was dissolved by four acids, evaporated to dryness, extracted with 3% hydrochloric acid + boric acid + sodium sulfate instead of aqua regia, and determined by flame atomic absorption spectrometry. The sensitivity of the assay was greatly improved. The detection limit was 3.12ug / g .