PH标准缓冲液
pH标准缓冲液pH=4.00(20°C)
pH标准缓冲液pH=4.00(20°C)红色
pH标准缓冲液pH=7.00(20°C)
认证二级缓冲液标准品 di-sodium tetraborate decahydrate, directly traceable to primary SRM from NIST/PTB pH(S) = 9.18 (25°C) CertiPUR
认证二级缓冲液标准品 potassium tetraoxalate dihydrate, directly traceable to primary SRM from NIST/PTB pH(S) = 1.68 (25°C) CertiPUR
pH标准缓冲液pH=9.00(20°C)
pH标准缓冲液pH=10.00(20°C)紫色
pH标准缓冲液pH=7.00(20°C)绿色
认证二级缓冲液标准品 potassium hydrogen phthalate, directly traceable to primary SRM from NIST/PTB pH(S) = 4.00 (25°C) CertiPUR
pH标准缓冲液pH=10.00(20°C)
pH标准缓冲液pH=9.00(20°C)蓝色
pH缓冲液/标准液