ISO 2750-1974 标准详情
- 标准号:ISO 2750-1974
- 中文标题:工业用尿素-尿素的HAZEN单元(铂钴比例)中的颜色测量-甲醛溶液
- 英文标题:urea for industrial use-measurement of colour in hazen units(platinum-cobalt scale) of a urea-formaldehyde solution
- 标准类别:国际标准化组织标准ISO
- 发布日期:1974-08-15
Lays down the principle of the visual comparison of the colour of a solution of the sample in formaldehyde, stabilized at a pH of 10 0.1, with that of colour standards. Expression of the results in terms of Hazen units. For routine control purposes,
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