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to SRM of NIST and PTB for 500 ml buffer solution, pH 12.00 ± 0.05 (20°C) Titrisol®
Buffer concentrate (phosphate/sodium hydroxide), traceable to SRM of NIST and PTB for 500 ml buffer
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of NIST and PTB for 500 ml buffer solution, pH 8.00 ± 0.02 (20°C) Titrisol®
Buffer concentrate (borate/hydrochloric acid), traceable to SRM of NIST and PTB for 500 ml buffer
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认证二级缓冲液标准品 potassium hydrogen phthalate, directly traceable to primary SRM from NIST/PTB pH(S) = 4.00₅ (25°C) CertiPUR®
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of NIST and PTB for 500 ml buffer solution, pH 5.00 ± 0.02 (20°C) Titrisol®
Buffer concentrate (citrate/sodium hydroxide), traceable to SRM of NIST and PTB for 500 ml buffer
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of NIST and PTB for 500 ml buffer solution, pH 6.00 ± 0.02 (20°C) Titrisol®
Buffer concentrate (citrate/sodium hydroxide), traceable to SRM of NIST and PTB for 500 ml buffer
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from NIST/PTB pH(S) = 1.68₁ (25°C) CertiPUR®
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缓冲剂 (Boric acid, Sodium hydroxide, Potassium chloride) tracable to SRM from NIST and PTB pH 11.00 (25°C) CertiPUR®
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缓冲剂 (Citric acid, Sodium hydroxide, Hydrogen chloride), tracable to SRM from NIST and PTB pH 2.00 (25°C) CertiPUR®
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pH标准缓冲溶液(pH=4.00±0.02),pH=4.00±0.02 (25℃)
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pH标准缓冲溶液(pH=7.00±0.02),pH=7.00±0.02 (25℃)
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