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GB/T 40189-2021 English PDF (GBT40189-2021)

GB/T 40189-2021 English PDF (GBT40189-2021)

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GB/T 40189-2021: Determination of metronidazole and norfloxacin in toothpaste - High performance liquid chromatography method
This Standard specifies high performance liquid chromatography (HPLC) method for the content of ammonium chloride antibacterial agents - laura ammonium chloride, benzethonium chloride, cetylpyridinium chloride, mitanium chloride and sitacium chloride - in toothpaste. This Standard is applicable to the determination of the content of 5 kinds of ammonium chloride antibacterial agents in toothpaste.

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