使用膜电极、电位电极、连续总氯分析仪和安培滴定仪对四个质量保证样品和四个自来水样品进行分析。测量总氯和游离氯浓度。本文对不同分析员用这些仪器方法得到的结果进行了统计分析。总氯分析仪被证明是独立于分析人员的，并且是需要连续或多次总氯分析时的选择方法。使用电位电极和安培膜电极的结果各不相同。包括25个参考文献和表格。

Four quality assurance samples and four tap water samples were analyzed using membrane electrodes, a potentiometric electrode, a continuous total chlorine analyzer, and an amperometric titrator. Total and free chlorine concentrations were measured. This article presents statistical analyses of the results obtained by different analysts with these instrumental methods. The total chlorine analyzer was shown to be analyst-independent and the method of choice when continuous or many total chlorine analyses are required. Results utilizing the potentiometric electrode vary, as do those of the amperometric membrane electrodes. Includes 25 references, tables.