摘要
研究分散黄23,分散橙149,分散黄7和苏丹红3等四种可分解4氨-基偶氮苯的染料在不同条件下的还原效果,以及4氨-基偶氮苯进一步的还原趋势。结果表明,用以检测4-氨基偶氮苯的合适的还原条件为：连二亚硫酸钠用量0.5～1.5 mL,氢氧化钠溶液浓度1%～2%,反应温度40℃,反应时间30 min。染料还原率最高可达100%,最低约为60%;4氨-基偶氮苯的得率最高为50%,最低为10%。
In this paper, four dyes of disperse yellow 23, disperse orange 149, disperse yellow 7 and Sudan III were selected to test their chemical reduction to 4-aminoazibenzene under different conditions, and further reduction of 4-aminoazibenzene was analyzed. Various factors on dye reduction were analyzed, such as concentration of caustic soda, amount of sodium dithionite, reaction time and temperature. Experiments demonstrated that 4-aminazobenzene could be properly determined under optimized conditions with 0. 5 - 1.5mL aquesous sodium dithionite solution, 1% -2%sodium hydroxyl solution and reductive reaction at 40℃ for 30 minutes. Reductive ratio of the analyzed dyes differed greatly, ranging from 60% to 100%. Besides, the different rate, with the maximum value of 50% and minimum of 10% of 4-aminoazobenzene was obtained in this system.
出处
《印染》
北大核心
2008年第21期35-39,共5页
China Dyeing and Finishing
基金
"十一五"国家科技支撑计划项目2006BAK10B03-3
国家质检总局项目2008IK091
国家标准制定项目20072287-T-608
关键词
测试
染料
还原
4氨-基偶氮苯
testing
dyes
reduction reaction
4-aminoazobenzene
