DETERMINATION OF NONIONIC SURFACTANTS IN WASTE-WATER BY DIRECT EXTRACTION WITH FOURIER-TRANSFORM INFRARED SPECTROSCOPIC DETECTION
DETERMINATION OF NONIONIC SURFACTANTS IN WASTE-WATER BY DIRECT EXTRACTION WITH FOURIER-TRANSFORM INFRARED SPECTROSCOPIC DETECTION
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DOI：
10.1039/an9931800153
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发表时间：
1993-02-01
期刊：
影响因子：
4.2
通讯作者：
ANDREW, BE
中科院分区：
文献类型：
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作者：
ANDREW, BE
废水中的非离子表面活性剂可以通过简单的盐析过程在二氯甲烷中提取和浓缩。然后利用1110 cm-1处的特征C-O-C拉伸振动来测量L浓度范围为0.1到50 mg的表面活性剂浓度。相对标准偏差从10 mg L-1一步萃取15%到1 mg L-1多次萃取蒸发重组的5%不等。肥皂是这项技术唯一的主要干扰因素。与常用的硫氰酸钴法比较表明，直接萃取和傅里叶变换红外检测相结合，从回收率的角度更准确地测定了水溶液中的非离子表面活性剂。在分析不同废水的样本时，观察到了不同程度的反应。当使用单步提取时，该过程明显更快，并且易于校准。
Non-ionic surfactants in waste water can be extracted and concentrated in dichloromethane using a simple salting-out procedure. The characteristic C-O-C stretch vibration at 1110 cm-1 is then utilized to measure surfactant concentration at levels ranging from 0.1 to 50 mg l-1. Relative standard deviations vary from 15% at the 10 mg l-1 level for a single-step extraction, to 5% at the 1 mg l-1 level for multiple extraction followed by evaporation and reconstitution. Soaps are the only major interference found for the technique. Comparison of this procedure with the commonly used cobaltothiocyanate method indicates that the combination of direct extraction and Fourier transform infrared detection is more accurate in determining non-ionic surfactants in aqueous solution from the viewpoint of recovery. Various levels of response were observed when analysing samples of different waste waters. The procedure is significantly more rapid when using the single-step extraction and is easily calibrated.