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The adsorptive stripping indirect tensammetric technique

机译：吸附剥离间接张力法

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A new tensammetric technique for the determination of trace concentrations of non-ionic surfactants (NS) has been developed. The adsorptive stripping indirect tensammetric technique (AdS-ITT) combines an adsorptive preconcentration of a substance-to-be-determined with the indirect tensammetric technique (ITT). The lowering of the tensammetric peak of the monitoring substance - ethyl acetate, is the analytical signal in the AdST-ITT, as it is in the ITT. The dynamic response range can be shifted towards a lower concentration range by one to three orders of magnitude by the selection of an adequate preconcentration time. However, the dispersion of calibration plots of different NS is larger in the AdS-ITT than in the ITT. The detection limit (at 60 seconds of preconcentration) is approximately 0.1 mug in the sample, i.e., more than one order of magnitude better than that without preconcentration. The 'zero signal' of ethyl acetate is considerably lower in the AdS-ITT than in the ITT due to adsorption of impurities of the base electrolyte. [References: 22]
机译：已经开发出一种用于测定痕量非离子表面活性剂（NS）的新的张力测定技术。吸附剥离间接张力法（AdS-ITT）将待测定物质的吸附预浓与间接张力法（ITT）结合在一起。就像ITT中一样，监控物质-乙酸乙酯的张力峰值的降低是AdST-ITT中的分析信号。通过选择适当的预浓缩时间，可以将动态响应范围向较低的浓度范围移动一到三个数量级。但是，在AdS-ITT中，不同NS的校准图的离散度要比ITT中的大。样品中的检出限（预浓缩60秒时）约为0.1马克杯，即比不进行预浓缩的检出限高出一个数量级。由于吸附了基础电解质中的杂质，因此在AdS-ITT中，乙酸乙酯的“零信号”比在ITT中要低得多。 [参考：22]

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