GB/T 12589-90
项目Item 分析纯 化学纯
(AR) (CP)
含量(C4H8O2)Assay,% 99.0 97.0
密度(20℃)Density,g/mL 0.899-0.901 0.897-0.901
色度Color，黑曾单位 ≤ 10 20
蒸发残渣Evaporation residue,% ≤ 0.0005 0.001
水份(H2O)Water,% ≤ 0.1 0.4
酸度(以H+计)Acidity,mmol/100g ≤ 0.08 0.08
甲醇(以CH3OH计)Methanol,% ≤ 0.1 0.2
乙醇(CH3CH2OH)Ethanol,% ≤ 0.2 0.5
乙酸甲酯(CH3COOCH3)Methyl formate,% ≤ 0.1 0.3
易炭化物质Readily carbonizable substances 合格 合格
品级Grade 优级纯
(GR)
外观Appearance 无色液体
红外光谱鉴别Infrared spectrometry 符合
纯度Purity ≥99.5% (GC)
水分Water <0.05 %
蒸发残渣Residue after evaporation <0.001 %
亚硫酸变暗物Subst. darkened by H2SO4 <10 APHA
甲醇Methanol <0.1 %
乙醇Ethanol <0.1
乙酸甲酯Methyl acetate <0.1 %
ACS级
项目名称 ACS Grade
含量Assay(CH3COOCH2CH3) ≥99.5%
色度Color(APHA) 10
灼烧残渣Residue after ignition ≤0.003%
水分（H2O）Water ≤0.2%
可滴定酸Titrable acid ≤0.0009meq/g
硫酸变黑物substances darkened by sulfuric acid Passes test
品级Grade 色谱纯
(for HPLC, ≥99.8%)
外观Appearance 无色液体
红外光谱鉴别Infrared spectrometry 符合
纯度Purity ≥99.8% (GC)
水分water <0.050% (by Karl Fischer)
蒸发残渣Residue on Evaporation <0.0003%
λ H2O reference
UV absorption
λ: 254 nm A: ≤1.00
λ: 263 nm A: ≤0.05
λ: 275 nm A: ≤0.01
λ: 400 nm A: ≤0.05
项目 光谱纯
(for spectroscopy)
外观Appearance 无色液体
色度Color scale <10 APHA
纯度Purity ≥99.0% (GC)
水分Water <0.05 %
紫外吸收值UV：
255 nm A: <1
275 nm A: <0.05
300 nm A: <0.03
325 nm A: <0.01
蒸发残渣Residue on Evaporation <0.0003 %
品级Grade 蛋白测序级
(for protein sequence analysis)
外观Appearance 无色液体
红外光谱鉴别Infrared spectrometry Conforms
纯度Purity ≥99.5% (GC)
水分water ≤0.1%
测序分析实验sequence analysis test Pass
项目 农残级
(for spectroscopy)
外观Appearance 无色液体
色度Color scale <10 APHA
纯度Purity ≥99.5% (GC)
水分Water <0.03 %
蒸发残渣Residue on Evaporation <0.0001 %
halogenated residue (GC/ECD) <10 ng/L (as heptachlor epoxide)
品级Grade LC-MS级
(for LC-MS, ≥99.9% (GC))
含量assay ≥99.9% (GC)
游离碱free alkali (as NH3) ≤0.0005%
非挥发物non-volatile matter ≤0.0005%
水分water ≤0.03% (Karl Fischer)
透光度transmittance
260 nm, ≤50%
300 nm, ≤98%
Ca: ≤0.1 ppm
K: ≤0.1 ppm
Mg: ≤0.1 ppm
Na: ≤0.1 ppm
Test for suitability for LC-MS passes
品级Grade 生物工程级
(biotech. grade, ≥99.9%)
外观Appearance Colorless Liquid
红外光谱鉴别Infrared spectrometry Conforms
纯度Purity ≥99.9% (GC)
可滴定酸Titratable acid ≤0.0009 meq
水分Water ≤0.01 % (by Karl Fischer)
蒸发残渣Residue on Evaporation ≤0.0003 %
λ H2O reference
UV absorption
λ: 254 nm A: ≤1.00
λ: 263 nm A: ≤0.05
λ: 275 nm A: ≤0.01
λ: 400 nm A: ≤0.01
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