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研究了新荧光试剂邻苯二胺缩双吡哆醛（ＢＰＤＩＢ）的分析应用。在稀硫酸（ｐＨ１．７～１．８）溶液中，铬（Ⅵ）能氧化邻苯二胺缩双吡哆醛，使其荧光熄灭，其熄灭程度与铬（Ⅵ）量成线性关系，据此提出了荧光熄灭测定水中微量铬（Ⅵ）的方法。铬（Ⅵ）的检出限为６．１１μｇ／Ｌ。
The analytical application of the new fluorescent reagent BPDIB was studied. In dilute sulfuric acid (pH1.7 ~ 1.8) solution, chromium (Ⅵ) oxidation of o-phenylenediamine Shuanghuang pyridoxal, its fluorescence is extinguished, its extinguishing degree and chromium (Ⅵ) amount of a linear relationship The proposed method of fluorescence quenching determination of trace chromium (Ⅵ) in water. The detection limit of chromium (Ⅵ) was 6.11 μg / L.