D．S．D酸中色素杂质含量的测定方法

Method for Determination of Pigment Impurity Contents in D.S.DAcid

通过研究提供了采用在一定条件下的Ｄ．Ｓ．Ｄ酸钠盐水溶液的吸光度来表示工业品膏状Ｄ．Ｓ．Ｄ酸中色素杂质含量的方法。该法具有简单易行，准确可靠的优点。

The detn. of the colored impurity contents in the industrial D.S.D acid Na salt paste was researched, and a procedure based on the aq. soln. photoabsorption was provided. This method is characterized by simplicity and reliability, and has been used in the productive practice with a certain degree of effectiveness.