In Hospital, specifically Kidney hospital, RO water was used for the cleaning of many equipment that could be reuse after cleaning. The RO water line would be sanitize with formalin to prevent microbial contamination. After disinfecting by formalin it should be necessary to identify whether formalin was removed or not. So, How to check the formalin residue with very short time.
Presence of formaldehyde in water is a serious issue in such application. it is recommended to use Gas Chronograph / flame ionisation detector / Integrator and column. for the analysis of formaldehyde.
Read this paper about determination of formaldehyde in aquas solutions:
http://www.sciencedirect.com/science/article/pii/S1319610312001913
Regards
Thanks for providing information, Furthermore, some strips are available into the market to check the content of formalin,
So, Is that product is reliable? and By which principle the strip can detect the formalin?
Read these kits carefully because in some cases it has limited detection. Also, read it's methodology to know if it work depend on color or not. Just search for those strips online or send it the name and company of it.
But I suggested that you do it practically.
Regards
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