质量标准
项目ltem 分析纯
(AR)
含量assay ≥99.0%
沸程Boiling rande,℃ 46.0~47.0
蒸发残渣Evaportion residue,% ≤0.002
其它硫化物及硫Sulfur and
other sulfides 合格
亚硫酸盐及硫酸盐(以SO4计)
Sulfite and sulfate,% ≤0.002
项目 低苯超纯级
(AR)
外观Appearance 透明液体
纯度Purity >99.9% (GC)
色度Color scale <10 APHA
硫Sulfur (S) <0.0003 % (from H2S)
蒸发残渣Residue after evaporation <0.002 %
苯Benzene <0.001 %
项目 ACS级
(ACS, ≥99.9%)
appearance colorless liquid
infrared spectrum conforms to structure.
gas liquid 99.90% (minimum)
water ≤0.05% by karl fischer
color test ≤10 apha
hydrogen sulfide passes test (limit for h2s is ~1.5 ppm)
sulfur dioxide passes test (limit for so2 is ~2.5 ppm)
品级Grade 色谱纯
(for HPLC, ≥99.9%)
外观Appearance Colorless Liquid
红外光谱鉴别Infrared spectrometry Conforms
纯度Purity ≥99.9% GC (area %)
水分Water ≤0.03 % (by Karl Fischer)
蒸发残渣Residue on Evaporation ≤0.0005 %
λ H2O reference
UV absorption
λ: 386 nm ≤1.0
λ: 388 nm ≤0.50
λ: 394 nm ≤0.25
λ: 403 nm ≤0.10
λ: 410 nm ≤0.05
λ: 500 nm ≤0.01
λ: 750 nm ≤0.01
品级Grade 光谱级
(for spectroscopy )
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 ≤0.03 % (by Karl Fischer)
蒸发残渣Residue on Evaporation ≤0.0005 %
色度Color Test ≤10 APHA
λ H2O reference
UV absorption
λ: 386 nm ≤ 1.0
λ: 388 nm ≤ 0.50
λ: 394 nm ≤ 0.25
λ: 403 nm ≤ 0.10
λ: 410 nm ≤ 0.05
λ: 500 nm ≤ 0.01
λ: 750 nm ≤ 0.01