ISO 11723:2016规定了在灰化、用酸提取灰渣和氢化物发生原子吸收光谱法或氢化物发生原子荧光光谱法期间使用Eschka混合物测定固体矿物燃料中砷和硒的方法。

ISO 11723:2016 specifies a method using Eschka's mixture during ashing, extraction of the ash residue with acid, and hydride generation atomic absorption spectrometry or hydride generation atomic fluorescence spectrometry, for the determination of arsenic and selenium in solid mineral fuels.