Analysis of disinfectants and disinfecting substances – ASTM and WHO approved Metrohm methods

With the ongoing COVID-19 pandemic, the use of disinfectant to combat the spreading of the virus, besides regular hand washing, remains important. Not only can we analyse soaps and key surfactants by titration but also disinfectants and key components in disinfectants, such as hydrogen peroxide or sodium hypochlorite.

Analysing disinfectants with Metrohm

Peroxides are often used for disinfection and water treatment purposes due to their antiseptic properties. Lower concentrations between 0.3–3% are used in households, while higher concentrations can be used for sterilisation purposes. Additionally, peroxides are utilised as oxidising and bleaching agents. Peroxides, perborates and percarbonates can easily be determined by titration.

This Application Note presents two titration methods for peroxide analysis: ASTM D2180 for concentrated hydrogen peroxide solutions, and a second method for trace determination of hydrogen peroxide, suitable for concentrations as low as 0.4 mg/L.

Follow this link to download the Application Note: https://bit.ly/39GUUST

Sodium hypochlorite and sodium chloride can be effectively used as disinfectant for water and surfaces. The World Health Organization (WHO) recommends, depending on the application, concentrations in disinfectants of 1000mg/L to 5000mg/L NaOCl and up to 200g/L NaCl.

This Application Note demonstrates a reliable method to determine the hypochlorite and sodium chloride content in disinfectants by two subsequent argentometric titrations in the range recommended by the WHO.

Follow this link to download the Application Note: https://bit.ly/3k8o9CW

METROHM SA (PTY) LTD
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www.metrohm.co.za



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