Tris乙磺酸

性状描述:

质量标准: 99%：

外观Appearance                          white Crystalline Powder
红外光谱Infrared spectrometry           Conforms to Structure
纯度Purity (Titration by NAOH) anhyd.   ≥99 %  
水溶性Solubility                        Colorless,Clear,25 g plus 50 ml H2O
水分Water (by Karl Fischer)             ≤0.2 %
A290 UV absorbance                      ≤0.1
                                        (c = 33% w/w)
重金属Heavy Metals (As Lead)            ≤5 ppm



品级Grade                         超纯级  
                            (Ultra pure,≥ 99.5%（T）)
外观appearance                   white powder
纯度purity by titration          ≥ 99.5%
水溶性solubility                 clear colorless (1 m in water)
干燥损失loss on drying           ≤ 1% (110 °C)
灼烧残渣residue on ignition      ≤0.1% (SO4, 900 °C)
不溶物insoluble matter passes    filter test
氯chloride (cl)                  ≤ 0.005%
硫酸根sulfate (so4)              ≤ 0.005%
铝aluminum (AL)                  ≤ 0.0005%
arsenic (As)                     ≤ 0.0001%
barium (Ba)                      ≤ 0.0005%
bismuth (Bi)                     ≤ 0.0005%
calcium (Ba)                     ≤ 0.001%
cadmium (Cd)                     ≤ 0.0005%
cobalt (Co)                      ≤ 0.0005%
chromium (Cr)                    ≤ 0.0005%
copper (Cu)                      ≤ 0.0005%
iron (Fe)                        ≤ 0.0005%
potassium (K)                    ≤ 0.02%
lithium (Li)                     ≤ 0.0005%
magnesium (Mg)                   ≤ 0.0005%
manganese (Mn)                   ≤ 0.0005%
molybdenum (Mo)                  ≤ 0.0005%
sodium (Na)                      ≤ 0.01%
nickel (Ni)                      ≤ 0.0005%
lead (Pb)                        ≤ 0.0005%
strontium (Sr)                   ≤ 0.0005%
zinc (Zn)                        ≤ 0.0005%
A260 (1 m in water)              ≤ 0.055
A280 (1 m in water)              ≤ 0.045
pH test                          3.5 to 5.0 (1 m in water)

储存条件: 室温

用途: 生物研究用Good＇s缓冲液中的成分