Thermo Fisher, 057590, Dionex™ Inorganic Anion and Oxyhalide Standards

Dionex™ Combined Seven Anion Standard II is a multi-component ion chromatography reference solution for routine anion calibration. The 100 mL standard contains fluoride, bromide, chloride, nitrite, nitrate, sulfate and phosphate at 20, 100, 100, 100, 100, 200 and 100 mg/L, respectively. It is designed for routine anion determinations and can be used to prepare multi-point calibration solutions without weighing and combining seven separate salts. The standard is prepared from high-purity reagent-grade chemicals and purified water, is NIST traceable and is supplied with a certificate of analysis. Its defined composition supports reproducible calibration, retention-time confirmation and system-performance checks across common suppressed-conductivity IC methods. Working standards should be prepared by appropriate dilution when the analytical method requires concentrations below the stock levels. The fixed component ratios are convenient for routine multi-anion methods, while separate single-ion standards can still be used when independent calibration or spiking is required.