I have a question for everyone
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Are there any other chemical or physical methods for calculating the ethanol content, in addition to determining the relative density using the specific gravity method and then converting it to get the content? Exclude gas chromatography. Can the moisture content of ethanol also be determined using the Karl Fischer titration method? Thank you all:handshake Last edited by lifanwang on 2009-4-6 19:59 ]
National standards all use the density measurement method, which is simple and easy to operate. The poster can refer to the method for determining the ethanol content in fruit and vegetable products; the principle behind this method is that ethanol is oxidized using potassium dichromate in a sulfuric acid medium, and then ammonium ferrous phenanthroline is used as an indicator to titrate the excess potassium dichromate with ammonium ferrous sulfate. This method is rather complicated. Moisture can be measured using the Karl Fischer method. This post was last edited by flks224086 on 2009-4-5 at 19:18.]
It can be detected using a Karl Fischer titrator, or it can be measured directly with a density meter
The friend on the second floor mentioned that using chemical oxidation methods for determination is a feasible approach; if there is no relevant testing equipment, the person in charge can use density measurement to determine the content.
Isn’t it also simple to use the refractive index method?
The content can be determined using a refractometer, while moisture can be measured by the Karl Fischer method. Our company often uses anhydrous ethanol, and this method is employed for that purpose as well
The Coulomb method micro moisture analyzer can also be used to measure moisture content.