This standard was last reviewed and confirmed in 2018. Therefore this version remains current.
The specified method is applicable to HCHO contents between 25 5 and 45 %. The field of application may be extended by siutably modifying the mass of the test portion. The principle consists in the reaction of the test solution with a neutral sodium sulphite solution, and acidimetric titration of the liberated sodium hydroxide in presence of thymolphthalein as indicator.
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|std 2 40||Paper|
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Stage: 90.20 (Under review)
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