![]() ![]() Precise software-controlled PAR delivery by patented Dosino technology.The new method is convenient to use and reliable and is approved by the FDA.Īdvantages of using Metrohm IC for zinc oxide assay: The new method is documented in the Metrohm Application Note AN-U-076, which can be downloaded from the Metrohm website. The ion chromatography analysis involves separation of zinc oxide followed by post-column reaction using 4-(2-pyridylazo) resorcinol (PAR) reagent and subsequent detection at 530 nm wavelength. ![]() USP has replaced the existing manual titration methods with the ion chromatography method and has rewritten the General Chapter 591. Zinc oxide is used in various skin care creams, drugs, and drug products. The new method is approved by the FDA and benefits users with more ease of use and reliability. USP 41-NF 36 was developed in partnership with Metrohm and replaces manual titration methods. USP has updated the General Chapter 591 'Zinc Determination' monograph to include ion chromatography as the preferred method for measuring zinc oxide. ![]()
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