如果企业客服不在线,也可拨打400电话联系。或者发布求购信息
缓冲液 (boric acid/potassium chloride/sodium hydroxide), traceable to SRM from NIST and PTB pH 9.00 (20°C) CertiPUR®
S818277-2.5kg 乙酸钠,无水,99%
M813156-500g 吗啉乙磺酸钠盐,99%
缓冲液 (citric acid/sodium hydroxide/hydrogen chloride), traceable to SRM from NIST and PTB pH 4.00 (20°C) CertiPUR®
H811129-2.5kg N-2-羟乙基哌嗪-N'-2-乙磺酸,99%
S818118-2.5kg 磷酸氢二钠,十二水合物,AR,99%
P816944-5g 哌嗪-N,N'-二(2-羟基丙磺酸)倍半钠盐,98%
M813439-2.5kg 吗啉乙磺酸,≥99.5%(T)
H823109-100ml pH标准缓冲溶液,pH=11±0.05(20℃)
pH缓冲溶液,pH 8.00±0.02 (20°C)