Solución concentrada tampón de pH 10 (borato), Fisher Chemical

Solución BS concentrada tampón de pH 4,00 (ftalato), estándar para medición de pH, Fisher Chemical

Buffer Concentrated Solution pH8.00 (Borate), NIST Standard for pH measurement, Fisher Chemical™

Número MDL: 163147

Buffer Colour Coded Concentrated Solution pH7.00 (Phosphate) Yellow, NIST Standard for pH measurement, Fisher Chemical™

Número MDL: 81857

Buffer Concentrated Solution pH2.00 (Glycine), NIST Standard for pH measurement, Fisher Chemical™

Solución concentrada tampón pH 4 (ftalato)

Solución BS concentrada tampón de pH 6,87 (fosfato), estándar para medición de pH, Fisher Chemical

Buffer Concentrated Solution pH9.2 (Borate), NIST Standard for pH measurement, Fisher Chemical™

Número MDL: 163147

Buffer Colour Coded Concentrated Solution pH10.00 (Borate) Blue, NIST Standard for pH measurement, Fisher Chemical™

Solución concentrada tampón de pH 7,00 (fosfato), estándar NIST para medición de pH, Fisher Chemical