GBT/646-93
项目ltem         　　　　　　　    优级纯     分析纯     化学纯
　　　　　　　　　　　　　　　　    （GR）　　（AR）　　 （CP）
含量(KCl)Assay,%   　　　　　     ≥99.8       99.5       99.5
pH(50g/L溶液，25℃)pH of
water solution                      5.0-8.0    5.0-8.0    5.0-8.0
澄清度试验Clarity                   合格       合格       合格
水不溶物lnsoluble matter
in water,%                        ≤0.003       0.005     0.02
溴化物(Br)Bromide,%               ≤0.01        0.02      0.05
碘化物(I)lodide,%                 ≤0.001       0.002     0.01
硫酸盐(SO₄)Sulfale,%              ≤0.001       0.002     0.005
总氮量((N)Total nitrogen,%        ≤0.0005      0.001     0.001
磷酸盐(PO₄)Sulfale,%              ≤0.0005      0.0005    0.002
钠(Na)Sodium,%                    ≤0.02        0.02      0.1
镁(Mg)Magnesium,%                 ≤0.0005      0.001     0.002
钙(Ca)Calcium,%                   ≤0.001       0.003     0.01
铁(Fe)lron,%                      ≤0.0001      0.0003    0.0005
钡(Ba)Barium,%                    ≤0.001       0.001     0.001
重金属(以Pb计)Heavy metals,%      ≤0.0005      0.0005    0.001


ACS级
项目名称　                                     ACS Grade
含量Assay                                      99.0-100.5%
pH(5%溶液,25.0℃)pH of a 5% solution at 25.0℃ 5.4-8.2
水不溶物Insoluble matter                       ≤0.005%
碘化物(I)Iodide                                ≤0.002%
溴化物(以Br计)Bromide                          ≤0.01%
氯酸盐，
硝酸盐(以NO3计)Chlorate and nitrate            ≤0.003%
磷酸盐(PO₄)Phosphate                           ≤5ppm
硫酸盐(SO₄)Sulfate                             ≤0.01%
重金属(以Pb计)Heavy metals                     ≤5ppm
铁(Fe)Iron                                     ≤0.0003%
钙(Ca)Calcium                                  ≤0.002%
镁(Mg)Magnesium                                ≤0.001%
钠(Na)Sodium                                   ≤0.005%


品级Grade                               分子生物学专用级  
                                     (for molecular biology, ≥99.5%)
外观Appearance                          白色粉末
纯度Purity                              ≥99.5% (银量滴定，无水计)  
水溶解试验solubility in water           合格，20G/150ML水
水分water                               ≤2%(K.F)
水分MOISTURE CONTENT                    ≤ 2%（K.F)
铁IRON<                                 ≤ 3PPM(ICP-ATOMIC EMISSION)
重金属HEAVY METALS                      ≤ 5PPM (AS LEAD)
DNA酶、RNA酶和蛋白酶
DNASE, RNASE AND PROTEASE               NONE DETECTED


品级Grade                               细胞培养专用  
                                     (cell culture tested, ≥99.5%)
外观Appearance                          白色粉末
纯度Purity                              ≥99.5% (银量滴定，无水计)  
水溶解试验solubility in water           合格，20G/150ML水
细胞培养测试CELL CULTURE TEST            PASS
昆虫细胞培养测试INSECT CELL TEST         PASS
植物细胞培养测试PLANT CELL CULTURE TEST  PASS


≥99.99% metals basis:


外观Appearance                          白色结晶
X-射线衍射分析X-Ray Diffraction         Conforms to Structure
纯度Purity                              ≥99.99% Based On Trace Metals Analysis
CL                                      47.1% - 48.0%  (银量滴定)
ICP Assay                               Confirms potassium component
痕量金属分析Trace Metal Analysis        ≤100ppm by ICP Atomic emission
痕量金属分析Trace Metal Analysis        ≤100ppm by ICP Atomic emission
Rb                                      
<50 ppm >Cs                                      
<50 ppm >


≥99.995% metals basis:


外观Appearance                          白色结晶或粉末
纯度Purity                              ≥99.995% Based On Trace Metals Analysis
CL                                      47.1% - 48.0%  (银量滴定)
ICP Assay                               Confirms potassium component
痕量金属分析Trace Metal Analysis        ≤50ppm by ICP Atomic emission
(Li、Na、Ni、Rb、Cs、Ca、Ba、Al、Pb、Mn、Bi、Eu)