XS Buffer pH 4,01 Red, N.I.S.T. Certificate, Accuracy: ±0,02, 5l

pH buffers XS are standardized solutions of pH values of 4.00, 7.00, 9.00, 9.21 and 10.01 with two years expiration. XS Buffers have metrological traceability to NIST standard and come with a certificate that is available for download from the website www.chromservis.cz. Buffers are color-coded and are factory tested for stability upon exposure to UV radiation and during freezing. The solutions are supplied in volumes of 250 ml, 500 ml and 5 I. XS Conductivity standards are available as pH buffers with a two year expiration and a certificate. Solutions are available in packs of 500 ml.

All solutions delivered in a volume of 250 ml and 500 ml are in a practical plastic canisters that facilitates calibration and prevents contamination of the stock solution.

Important features

• Metrological traceability (N.I.S.T.)
• Easy to use
• Economical operation (for calibration use only a small quantity of sample)
• Stability 2 years