| 水中阴离子表面活性剂的测定 |
| 摘要点击 515 全文点击 1809 投稿时间：1994-06-26 |
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| 中文关键词 偶氮红 两相滴定法 阴离子表面活性剂 废水 |
| 英文关键词 zophloxine two-phase titration anionic surfactants wastewater |
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| 中文摘要 |
| 偶氮红两相滴定法在pH=7.5的条件下,能测定水和废水中的各种阴离子表面活性剂的摩尔浓度。本文通过对硫酸盐、磺酸盐、苯磷酸盐、肥皂和磷酸盐等各类阴离子表面活性剂的测定,以及干扰试验和实际水样测定,表明此法优于亚甲基蓝分光光度法。方法的变异系数为1.0%(n=11),最小检出浓度0.052mg/L(n=21),加标回收率92.1—110.2%,平均100.6%((n=14).建议水中阴离子表面活性剂用摩尔浓度或PSAA表示。 |
| 英文摘要 |
| The molar concentration of various kinds of anionic surfactants in water and wastewater were determined at pH=7.5 with azophloxine twophase titration. The results of determination of anionic surfactants such as sulfates, sulfonates,benzesulfonates, soap and phosphates etc, with azophloxine titration and methylene blue photometry, respectively, were compared and the interference tests and actual samples analysis were performed. All results show that the azophloxine titration was superior to the methylene blue photometry. The coefficient of variation was 1.0%(n=11);minimum detectable concentration,0.052 mg/L(n=21);recovery of standard addition, 92.1%—110.2% on average 100.6% (n=14). It was suggested that the concentration of anionic surfactants in water should be expressed in molar concentration or PSAA, in stead of mg/L. |
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