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Buffer solution (potassium hydrogen phthalate), traceable to SRM from NIST and PTB pH 4.01 (25°C) Certipur®
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1990010001 · Merck
Buffer solution (potassium hydrogen phthalate), traceable to SRM from NIST and PTB pH 4.01 (25°C) Certipur
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1990190001 · Merck
Buffer solution (di-sodium tetraborate)tracable to SRM from NIST and PTB pH 9.18 (25°C) Certipur
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1016451000 · Merck
Buffer solution (di-sodium tetraborate), traceable to SRM from NIST and PTB pH 9.22 (20°C)
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1098790001 · Merck
Buffer concentrate for buffer solution acc. to WEISE
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