ISO 1388-7-1981 工业用乙醇 试验方法 第7部分:甲醇含量(0.01～0.20%(V/V)甲醇含量)的测定 光度法

标准号：ISO 1388-7-1981
中文标准名称：工业用乙醇 试验方法 第7部分:甲醇含量(0.01～0.20%(V/V)甲醇含量)的测定 光度法
英文标准名称：Ethanol for industrial use; Methods of test; Part 7: Determination of methanol content (methanol contents between 0,01 and 0,20 % (V/V)); Photometric method
标准类型：G15
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G15
国际标准分类号：71.080.60
适用范围：The principle is based on the conversion of methanol present in a test portion to formaldehyde by oxidation. The oxidation is carried out with a solution of potassium permanganate in phosphoric acid. Reaction of the formaldehyde formed with chromotropic acid (4,5-dihydroxynaphthalene-2,7-disulphonic acid). Photometric measurement of the violet coloration obtained at a wavelength of about 570 nm. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical revision.