เคมี
เอกสารมาตรฐาน
สหรัฐอเมริกา
AOCS
Ea 8-58
Moisture in Glycerin, Karl Fischer Method
2017
3
665.0288 AOCS 7th ed. 2017-2019 rev. Ref. (Loose-Leaves FL2)
This method determines the actual water content of glycerol by reaction of the water with a pyridinesulfur dioxide solution and titration with an iodine-methanol solution. Applicable to distilled glycerin. May be used with any glycerol-water solution which contain no interfering substances.