N.N-二羟乙基甘氨酸

性状描述: 白色晶体粉末。
熔点: 190-192℃
pH range 7.6 - 9.0
pKa (25 °C) 8.3

质量标准: 99%：

外观Appearance                       White Crystalline Powder
可溶性Solubility                     Colorless，Clear，25% (w/w), H2O
水分Water (by Karl Fischer)          ≤0.2 %
紫外吸收UV Absorbance 290nm          ≤0.05，25% (w/w)
红外光谱Infrared spectrum            Conforms to Structure
重金属Heavy Metals(As Pb)            ≤5 ppm
纯化Purity (Titr. by NAOH) anhyd.    ≥99 %



品级Grade                            超纯级，≥99.5% (T)
                                (Ultra pure, ≥99.5% (T))
外观Appearance                       White Crystalline Powder
红外光谱Infrared spectrum            Conforms to Structure
含量assay                            ≥99.5% (T)
不溶物insoluble matter,              passes filter test
灼烧残渣Residue On Ignition          ≤0.1%
干燥失重loss on drying, 20 °C (HV)  ≤0.1%
pH                                   4.0-5.5 (25 °C, 1 M in H2O)
useful pH range                      7.6 - 9.0
pKa (25 °C)                         8.3
水溶性solubility H2O:                soluble1 M at 20 °C, clear, colorless
氯chloride (Cl-): ≤50 ppm
硫酸根sulfate (SO42-): ≤50 ppm
cation traces Al: ≤5 ppm
  As: ≤0.1 ppm
  Ba: ≤5 ppm
  Bi: ≤5 ppm
  Ca: ≤20 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 1 M in H2O
UV absorption λ: 260 nm A: ≤0.070
UV absorption λ: 280 nm A: ≤0.040

储存条件: 室温保存

用途: 生物缓冲剂低温生化工作中推荐buffer。用在制备稳定的底物溶液，用于血清鸟嘌呤酶测定。也是用途非常广泛的一种Buffer,用于酶反应缓冲液，电泳缓冲液，工作浓度从3-100mM。