標(biāo)準(zhǔn)號(hào)：ISO 1388-7-1981
中文標(biāo)準(zhǔn)名稱(chēng)：工業(yè)用乙醇 試驗(yàn)方法 第7部分:甲醇含量(0.01～0.20%(V/V)甲醇含量)的測(cè)定 光度法
英文標(biāo)準(zhǔn)名稱(chēng)：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
標(biāo)準(zhǔn)類(lèi)型：G15
發(fā)布日期：1999/12/31 12:00:00
實(shí)施日期：1999/12/31 12:00:00
中國(guó)標(biāo)準(zhǔn)分類(lèi)號(hào)：G15
國(guó)際標(biāo)準(zhǔn)分類(lèi)號(hào)：71.080.60
適用范圍：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.