1,4-二氨基葱醌是染料还原棕BR的主要原料,其分析方法一般采用基耶达定氮法(方法1)结合纸色层分离鉴定其中1,4-二羟基蒽醒和1-氨基-4-羟基蒽醌,操作手续较繁,而且对各种氨基蒽醌不能分离,测得的是多种氨基的总和.误差也在0.5～1％。我厂曾采用以苯:吡啶:甲醇:氯仿:水(6:0.5:10:0.5:2)为展开剂,中性氧化铝为吸附剂,毗啶为溶剂的薄层分离法(方法2),但主成分与展开剂前沿一起前进,组分未分开。据资料介绍,可用环已烷:乙醚(1:1)或(4:3),乙酸乙酯:正丙 1,4-diamino onion quinone is the main raw material of dye-reduced brown BR, the analysis method is generally based on the method of Chieda fixed nitrogen method (method 1) combined with paper color layer separation identified 1,4-dihydroxyanthracene awake and 1- Amino-4-hydroxy anthraquinone, the operating procedures of the more complex, but also for a variety of amino-anthraquinone can not be separated, measured the sum of a variety of amino. The error is also 0.5 ~ 1%. Our factory has used the thin layer separation method of benzene: pyridine: methanol: chloroform: water (6: 0.5: 10: 0.5: 2) as developing agent, neutral alumina as adsorbent and pyridine as solvent (method 2) , But the main component and the forefront of the developer advance together, the components are not separated. According to the information available cyclohexane: ether (1: 1) or (4: 3), ethyl acetate: n