1.目的和范围1。1本试验方法测定含有过氧化氢和任何来源的碱的漂白浴的总碱含量。总碱含量表示为%氢氧化钠。1.2漂白浴中的碱可由氢氧化钠、硅酸钠、碳酸钠或各种其他碱性材料提供，包括钾化合物、氨、石灰或含有碱性盐的过氧固体。1.3漂白浴的碱含量是决定漂白过程对漂白织物影响的速度和程度的关键参数。1.4本试验方法用于实验室测定和过程控制。2.原则2。1用标准硫酸溶液滴定漂白浴的称重试样，使其达到酚红终点，或在pH计上达到pH值范围6.8-8.4。总碱含量（以NaOH百分比表示）根据镀液重量计算。

1. Purpose and Scope1.1 This test method determines the total alkali content of a bleach bath containing hydrogen peroxide and alkali from any source. The total alkali content is expressed as % sodium hydroxide.1.2 Alkali in bleach baths may be supplied by sodium hydroxide, sodium silicate, sodium carbonate, or by various other alkaline materials, including potassium compounds, ammonia, lime, or by peroxygen solids which contain alkaline salts.1.3 The alkali content of a bleach bath is a critical parameter in determining the rate and extent to which the textile being bleached is affected by the bleaching process.1.4 This test method is used for laboratory determinations and for process control.2. Principle2.1 A weighed specimen of the bleach bath is titrated with a standardized solution of sulfuric acid to a Phenol Red endpoint, or to the pH range 6.8-8.4 on a pH meter. The total alkali, expressed as % NaOH, is calculated based on the weight of the bath.