標準號：ISO 6387-1983
中文標準名稱：表面活性劑 鈣皂分散力的測定 酸量滴定法(改進的舍恩費爾特法)
英文標準名稱：Surface active agents; Determination of the power to disperse calcium soap; Acidimetric method (Modified Schoenfeldt method)
標準類型：G72
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G72
國際標準分類號：71.100.40
適用范圍：A 0,5 % (m/m) aqueous soap solution is prepared, and after maintaining this at testing temperature for 24 h, an aliquot portion of this solution is taken. This aliquot portion is mixed with a dilute solution of the dispersing agent (surface active agent) and subsequently with a specified volume of water of known calcium hardness. The mixture is maintained for 1 h at the testing temperature and then the calcium soap present in a aliquot portion of the lower layer is titrated with a standard volumetric solution of hydrochloric acid in the presence of bromcresol green as indicator.