ISO 11400:1992 镍,镍铁和镍合金.磷含量测定.二氧磷钒钼分子吸收光谱法

标准编号：ISO 11400:1992

中文名称：镍,镍铁和镍合金.磷含量测定.二氧磷钒钼分子吸收光谱法

英文名称：Nickel, ferronickel and nickel alloys — Determination of phosphorus content — Phosphovanadomolybdate molecular absorption spectrometric method

发布日期：1992-09

标准范围

磷含量可在0000 5%（m/m）至0.05%（m/m）范围内测定。As、Cr、Hf、Nb、Si、Ta、Ti、W干扰，但干扰可以避免。其原理是将供试品溶解在硝酸和盐酸的混合物中，用高氯酸发烟，去除铬，络合硅，将磷转化为磷钒钼酸，提取该化合物。

Phosphorus content can be determined in the range of 0,000 5 % (m/m) to 0,05 % (m/m). As, Cr, Hf, Nb, Si, Ta, Ti, W interfere, but the interferences can be avoided. The principle is dissolution of a test portion in a mixture of nitric and hydrochloric acids, fuming with perchloric acid, removal of chromium, complexation of silicon, conversion of phosphorus to phosphovanadomolybdic acid, extraction of this compound.

标准预览图