48602 Tris乙磺酸 Ultra pure,≥ 99.5%（T） 25g 275
48606 Tris乙磺酸 Ultra pure,≥ 99.5%（T） 100g 988
48610 Tris乙磺酸 99% 25g 170
48613 Tris乙磺酸 99% 100g 568
48616 Tris乙磺酸 99% 500g 1200
useful pH range 6.8 - 8.2 pKa (25 °C) 7.5
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)

生物研究用Good's缓冲液中的成分