Buffer solution

REF : 1094750500
Marca : Supelco
Descrição :Buffer solution (citric acid/sodium hydroxide/hydrogen chloride) colour: red traceable to SRM from NIST and PTB pH 4.00 (20 C) Certipur(R)
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Descrição detalhada : The red-colored citric acid/sodium hydroxide/hydrogen chloride buffer solution is gravimetrically prepared using high-quality reagents, in accordance with DIN EN ISO/IEC 17025, at a registered calibration laboratory. Its pH value of 4.00 at 20C is measured following a 5-point calibration method, using a combined glass electrode. The measurement is made following DIN 19268 using reference buffer solutions compliant to DIN 19266, NIST, IUPAC, Ph. Eur, and USP. Its pH value is strongly dependent on the temperature and therefore a constant temperature must be maintained during its use.
Armazenamento : 15-25C
Embalagem : 1X1EA