| 质量标准： |
执行标准 ： GB/678-2002
项目Item 优级纯 分析纯 化学纯
(GR) (AR) (CP)
含量(CH3CH2OH),% ≥99.8 99.7 99.5
密度(20℃)Density,g/mL 0.789-0.791 0.789-0.791 0.789-0.791
与水混合试验Miscibility with water 合格 合格 合格
蒸发残渣Evaporation residue,% ≤0.0005 0.001 0.001
水份(H2O)Water,% ≤0.2 0.3 0.5
酸度(以H+计)Acidity,mmol/100g ≤0.02 0.04 0.1
碱度(以OH-计)Alkalinity,mmol/100g ≤0.005 0.01 0.03
甲醇(以CH3OH计)Methanol,% ≤0.02 0.05 0.2
异丙醇[(CH3)2CHOH] ≤0.003 0.01 0.05
羟基化合物(以CO计)Carbonyl compounds ≤0.003 0.003 0.005
还原高锰酸钾物质(以O计)Potassium ≤0.00025 0.00025 0.0006
permanganate reducing substances
易碳化物质Readily carbonizable
substances 合格 合格 合格
铁(Fe)Iron,% ≤0.00001 -- --
锌(Zn)Zinc,% ≤0.00001 -- --
ACS级
项目名称Item ACS Grade
含量Assay(CH3CH2OH) ≥99.5%
水分(H2O)Water ≤0.2%
色度Color(APHA) 10
水溶解试验Solubility in water Passes test
蒸发残渣Residue after evaporation ≤0.001%
丙酮异丙醇试验Acetone,isopropyl alcohol ≤Passes test
可滴定酸Titrable acid ≤0.0005meq/g
可滴定碱Titrable base ≤0.0002meq/g
甲醇Methanol(CH3OH) ≤0.1%
硫酸变黑物substances darkened by sulfuric acid Passes test
还原高锰酸盐物质Substances reducing permanganate Passes test
品级Grade 光谱纯
(for HPLC grade)
纯度Purity ≥99.8% (GC)
λ 1 cm path, H2O reference
吸光度
λ:210nm ≤1.0
λ:225nm ≤0.26
λ:240nm ≤0.10
λ: 254 nm ≤ 0.02
λ:260nm ≤0.01
荧光度(奎宁)254nm ≤1ppb
荧光度(奎宁)365nm ≤1ppb
游离酸(CH3COOH) ≤0.001%
不挥发物 ≤0.001%
水分 ≤0.2%
品级Grade 色谱纯
(HPLC)
纯度Purity ≥99.8% (GC)
游离酸free acid (as CH3COOH) ≤0.001%
非挥发性物质non-volatile matter ≤0.001%
水分water≤0.2% (Karl Fischer)
荧光度(奎宁)fluorescence (quinine)at 254 nm ≤1 ppb
荧光度(奎宁)fluorescence (quinine) at 365 nm ≤1 ppb
透光率transmittance
210 nm, ≥20%
225 nm, ≥50%
240 nm, ≥80%
260 nm, ≥98%
品级Grade 分子生物学专用
(for molecular biology, ≥99.8%)
含量assay ≥99.8%
DNA酶DNases, none detected
高锰酸钾还原物质KMnO4-reducing substances, in accordance
RNA酶RNases, none detected
不溶物insoluble matter, passes filter test
磷酸酶phosphatases, none detected
蛋白酶proteases, none detected
遇硫酸变黑物质substances darkened by H2SO4, in accordance
游离碱free alkali (as NH3) ≤0.0004%
醛aldehyde (as CH3CHO) ≤0.001%
甲醛formaldehyde (as HCHO) ≤0.001%
酮ketone (as CH3COCH3) ≤0.001%
游离酸free acid (as CH3COOH) ≤0.002%
甲醇methanol (CH3OH) ≤0.1%
水分water ≤0.02%
蒸发残渣evapn. residue ≤0.001%
Al: ≤0.5 ppm
Ba: ≤0.1 ppm
Bi: ≤0.1 ppm
Ca: ≤0.5 ppm
Cd: ≤0.05 ppm
Co: ≤0.02 ppm
Cr: ≤0.02 ppm
Cu: ≤0.1 ppm
Fe: ≤0.1 ppm
K: ≤0.5 ppm
Li: ≤0.1 ppm
Mg: ≤0.1 ppm
Mn: ≤0.02 ppm
Mo: ≤0.1 ppm
Na: ≤1 ppm
Ni: ≤0.02 ppm
Pb: ≤0.1 ppm
Sr: ≤0.1 ppm
Zn: ≤0.1 ppm
λ neat
紫外吸收UV absorption
λ: 260 nm ≤0.04
λ: 280 nm ≤0.03
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