質(zhì)量標(biāo)準(zhǔn): 外觀Appearance 白色結(jié)晶粉末或結(jié)晶
紅外光譜鑒別Infrared spectrometry 和對(duì)照品匹配
純度Purity >98.0%
干燥損失Loss on drying <0.2 % (105°C, 3 小時(shí))
重金屬Heavy metals (as Pb) <10 ppm
硫酸鹽灰分Sulfated ash <0.1 %
pH 4.7 - 6.2 (2.5% 溶液, 25°C)
其它氨基酸Other amino acids <0.5 % (TLC)
比旋度Specific rotation [a]20/D +21.4° - +23.6°(c=8, 6 N HCl)
痕量分析Trace analysis :
SO4 < 300 ppm
NH4 < 200 ppm
Fe < 10 ppm
透光度Transmittance >95 % (c=10, H2O, 430 nm) 1 cm cell
USP級(jí)
ASSAY (DRIED BASIS) 98.5 - 101.5 %
SPECIFIC ROTATION [a]D +21.4 TO+23.6
LOSS ON DRYING -- 0.2 %
CHLORIDE CONTENT 16.5 - 17.1 %
RESIDUE ON IGNITION -- 0.1 %
SULFATE -- 0.03 %
HEAVY METALS -- 0.002 %