Růzicka J, Lamm C G
Chemistry Department A, Technical University of Denmark, Building 207, Lyngby, Denmark.
Talanta. 1969 Feb;16(2):157-68. doi: 10.1016/0039-9140(69)80267-5.
Solid samples (1-2 g) are burned in oxygen in a flask containing radiomercury in dilute hydrochloric acid, in which the non-active mercury to be determined is immediately absorbed. All mercury is subsequently extracted by dithizone in carbon tetrachloride and then re-extracted into dilute hydrochloric acid. This aqueous phase is further analysed automatically (AutoAnalyzer, 20 samples hr ) as previously described. Liquids (up to 100 ml) are analysed in the same way but instead of being burned in oxygen are first oxidized with potassium permanganate in acid medium. Quantities between 2 and 0.00004 ppm Hg were determined in various materials. Results for international biological standards agreed well with values obtained by activation analysis: kale 0.159 ppm Hg (relative standard deviation 2%) and IAEA cereals 0.0435 ppm Hg (+/- 5%). The new method is far more simple and rapid than activation analysis and just as sensitive; it is therefore more suitable for routine work. About 100 samples can be analysed per day.
将固体样品（1 - 2克）在装有稀盐酸中放射性汞的烧瓶中于氧气中燃烧，待测定的非活性汞立即被吸收。随后，所有汞用四氯化碳中的双硫腙萃取，然后再萃取到稀盐酸中。该水相按先前所述自动进一步分析（自动分析仪，每小时20个样品）。液体（最多100毫升）以同样方式分析，但不是在氧气中燃烧，而是首先在酸性介质中用高锰酸钾氧化。在各种材料中测定了2至0.00004 ppm汞的含量。国际生物标准品的结果与活化分析获得的值吻合良好：羽衣甘蓝0.159 ppm汞（相对标准偏差2%），国际原子能机构谷物0.0435 ppm汞（±5%）。新方法比活化分析简单得多且快速，灵敏度相同；因此更适合常规工作。每天大约可分析100个样品。
