纯度Purity （ 以干基计）                >99.0% (Titrimetry)  
外观Appearance                          白色结晶粉末
红外光谱鉴别Infrared spectrometry       符合
干燥损失Loss on drying                  <3 % (105°C, 16 小时)
重金属Heavy metals (as Pb)           <20 ppm
痕量分析Trace analysis :
  砷As measure                               < 3 ppm
  硫酸根SO4 measure                     < 50 ppm
  氯Cl measure                                < 50 ppm
  铁Fe measure                               < 5 ppm
  硫酸根PO4 measure                     < 100 ppm
  草酸根C2O4 measure                   < 100 ppm
还原物Reducing substances           <1 % (as dextrose)


品级Grade                               药用USP级  
                                        (USP)
鉴别实验IDENTITY                        PASS
干燥损失LOSS ON DRYING            ≤ 3.0%
氯离子CHLORIDE                          ≤ 0.07%
硫酸根SULFATE                             ≤ 0.05%
砷ARSENIC                                    ≤ 3 PPM (METHOD I)
重金属HEAVY METALS                   ≤ 0.002% (METHOD II)
还原性物质REDUCING SUBSTANCES           ≤ 1.0%
残渣溶剂RESIDUAL SOLVENTS               MEETS THE REQUIREMENTS
含量ASSAY                               98.0% ～ 102.0% (DRY BASIS)

98%