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| 分光光度法测定水中十六烷基三甲基溴化铵 |
| SpectrophotometricM ethod for Determ ination of Cetyltrimethyl ammonium Brom ideinW ater |
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| DOI： |
| 中文关键词: 十六烷基三甲基溴化铵 甲基橙 分光光度法 水质 |
| 英文关键词: Cetyltrimethyl ammonium bromide M ethylorange Spectrophotom etry W aterquality |
| 基金项目: |
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| 中文摘要: |
| 基于甲基橙 (MO) 在水体中和阳离子表面活性剂发生的 褪色反应, 采用分光光度法测定十六烷基三甲基溴化铵 (CTAB), 优化了试验条件, 讨论了干扰物质的影响。MO与CTAB在10% 乙醇-水溶液中反应形成淡黄色离子缔合物, 以MO的最大吸收波长470 nm为测定波长,CTAB质量浓度在0 m g/L~ 13.1 m g/L范围内遵守朗伯-比尔定律, 吸光系数为17.48 L/(g· cm), 方法检出限为0.364 mg/L, 标准溶液平行测定的RSD为 2.3%, 样品加标回收率为91.8% ~ |
| 英文摘要: |
| Based on acolourretardation ofmethylorange with cationicsurfaceactiveagentinwater, Cetylt rim ethyl ammonium bromide wasdetermined byspectrophotometry. Thetestconditionswereoptimized andinter feringsubstanceswere discussed. M ethylorangereacted with cetyltrimethyl ammonium brom ideforming yellow associatedion pairs. Absorptivity was17.48 L/(g cm) in solution ofcetyltrimethyl ammonium bromideranging between 0mg/L and 13.1 mg/L, and colorabsorption obeyedlambert beers'law at470 nm maximum absorptionwavelength ofM ethylorange. D etectionlim itofmethodwas0.364mg/L. RSD ofparallelstandardsolu tionwas2.3%. Spikedrecoveriesofsampleswerebetween 91.8% and 107%. |
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