| 纸上吸光光度法研究——水中阴离子表面活性剂的测定 |
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| 引用本文： | 马登军,李丽清. 纸上吸光光度法研究——水中阴离子表面活性剂的测定[J]. 河北大学学报(自然科学版), 1993, 0(2) |
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| 作者姓名： | 马登军 李丽清 |
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| 作者单位： | 河北建筑工程学院(马登军)，山东泰安师范专科学校(李丽清) |
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| 摘 要： | 本方法采用阳离子显色剂亚甲基蓝试剂,与阴离子表面活性剂形成不溶于水的离子对沉淀,将沉淀吸滤在滤纸上,直接置于721型分光光度计中,用双波长吸光度差值法定量,操作简单、快速,选择性好,灵敏度高。对于0.5μg阴离子表面活性剂13次测定变异系数为2.2％。样品测试回收率在96-102％之间,以取样体积为20ml计,最小检出浓度为7.5×10~(-8)g/ml。
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| 关 键 词： | 阴离子表面活性剂 纸上分光光度法 亚甲基蓝 |
Paper Absorption Spectrophotometric Determination of Anionic Surfactant in Environmental Water by Methylene Blue Method |
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| Ma Dengjun. Paper Absorption Spectrophotometric Determination of Anionic Surfactant in Environmental Water by Methylene Blue Method[J]. Journal of Hebei University (Natural Science Edition), 1993, 0(2) |
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| Authors: | Ma Dengjun |
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| Abstract: | The anionic surfactant was precipitated with methylene blue agent. The ionpair precipitatethrough a filtering pipette was collected on a small piece of filter paper as a blue fleck of which the absorbance was determined at 670nm and 730nm with a spectrophotometer of Model 721. The system obeys Beer's law in the range of 0-1.75μg/ml of anionics. The precisiongenerally varies for 0.50μg anionics within ?2.2%. The detection limit and recovery of this method are 7.5 × 10 -8g/ ml and 96-102% respectively. |
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| Keywords: | Anionics surfactant Paper absorption spectrophotometry Methylene blue |
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