所述参考方法适用于总汞含量在约0.01%（m/m）至0.5%（m/m）范围内的产品。也可扩展至总含量超过0.5%（m/m）的产品。该方法的原理是在封闭系统中用氧气燃烧试验部分。将所得溶液中的汞（II）化合物还原为元素汞。在环境温度下在气流中夹带金属，并在253.7 nm波长范围内通过冷蒸汽原子吸收光谱法测定为单原子蒸汽。

The reference method described is applicable to products having total mercury contents in the range of about 0.01 % (m/m) to 0.5 % (m/m). May also be extended to products with a total content of more than 0.5 % (m/m). The principle of the method consists in the combustion of the test portion with oxygen in an enclosed system. Reduction of the mercury(II) compounds contained in the resulting solution to elementary mercury. Entrainment of the metal in a gas stream at ambient temperature and determination as the monoatomic vapour by cold vapour atomic absorption spectrometry at a wavelength in the region of 253.7 nm.