Steinhauser L, Sikola J
Vet Med (Praha). 1983 Nov;28(11):693-8.
The determination of sodium chloride content in salt brines is important for many reasons, including that of influencing the organoleptic properties of final products already prior to production. The method of determination by direct potentiometry is rapid, simple, requires no chemicals and has sufficient accuracy for use in producers' laboratories. The comparison of both methods of sodium chloride determination--direct potentiometry and direct titration without previous adjustment of samples--showed that titration gave higher sodium chloride levels (by 2.5 g per litre, i. e. 2.15%) than did ISE determination. For current laboratory examinations and for sodium chloride determination in meat plants, this difference is almost negligible. However, if sodium chloride is to be determined by the so called conclusive method, the measurement cannot be performed without previous mineralization of samples and without the use of buffer to damp down the effect of interfering ions.
盐卤中氯化钠含量的测定很重要，原因有很多，包括在生产前就会影响最终产品的感官特性。直接电位法测定方法快速、简单，无需化学试剂，在生产厂家实验室使用时具有足够的准确性。对氯化钠的两种测定方法——直接电位法和未经样品预先处理的直接滴定法——进行比较，结果表明滴定法测得的氯化钠含量比离子选择性电极（ISE）测定法高（每升高2.5克，即2.15%）。对于当前的实验室检测以及肉类加工厂中氯化钠的测定，这种差异几乎可以忽略不计。然而，如果要用所谓的确证方法测定氯化钠，就必须先对样品进行矿化处理并使用缓冲剂来抑制干扰离子的影响，否则无法进行测量。
