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品级Grade 超纯级
(Ultra Pure,≥99.5% (HPLC))
纯度Purity ≥99.5% (HPLC)
比旋光度Specific rotation [a]20/D [α]20/D +53±1°, 22 hr, c = 10% in H2O
insoluble matter, passes filter test
Residue on ignition ≤0.05% (as SO4)
pH 3.5-6.0 (25 °C, 0.5 M in H2O)
solubility H2O: soluble0.5 M at 20 °C, clear, colorless
anion traces
chloride (Cl-): ≤50 ppm
sulfate (SO42-): ≤50 ppm
cation traces
Al: ≤5 ppm
As: ≤0.1 ppm
Ba: ≤5 ppm
Bi: ≤5 ppm
Ca: ≤10 ppm
Cd: ≤5 ppm
Co: ≤5 ppm
Cr: ≤5 ppm
Cu: ≤5 ppm
Fe: ≤5 ppm
K: ≤50 ppm
Li: ≤5 ppm
Mg: ≤5 ppm
Mn: ≤5 ppm
Mo: ≤5 ppm
Na: ≤50 ppm
Ni: ≤5 ppm
Pb: ≤5 ppm
Sr: ≤5 ppm
Zn: ≤5 ppm
λ 0.5 M in H2O
UV absorption
λ: 260 nm A: ≤0.02
λ: 280 nm A: ≤0.02
98%:
外观Appearance White Powder
Infrared spectrum Conforms to Structure
纯度Purity ≥98.0% (HPLC)
比旋光度Specific rotation [α]20/D +50～+53°, 22 hr, c = 4.5 in H2O
水分Water (by Karl Fischer) 4.0- 6.0 %
灼烧残渣Residue on ignition (Ash) ≤0.03%
不溶物Insoluble matter ≤0.005%
葡萄糖Dextrose passes test
铁Iron (Fe) ≤5 ppm
重金属Heavy Metal (As Pb) ≤5 ppm
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