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Continue to ChatpH Tampon Kalibrasyon Standart Solüsyonu, pH 4.00, 20°C’de ± 0.01 (Potasyum Hidrojen Ftalat) - 1000 ml https://www.elementel.com/ueruenler-ve-hizmetler/ueruen-detayi/d/ph-tampon-kalibrasyon-standart-solusyonu-908-b04-1000