Micro-chemical test pH value: Difference between revisions
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Author:[[User:CBlaeuer|Christine Bläuer]] | |||
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back to [[Micro-chemical testing]] <br><br> | |||
== Determination of pH == | |||
For more information on the required equipment and materials see [[Micro-chemical testing]]. | |||
=== Analytical procedure === | |||
The 1-14 pH indicator paper is dipped into the aqueous solution of the sample. The color of the pH indicator paper is compared to the color matching chart given on the wrapping. | The 1-14 pH indicator paper is dipped into the aqueous solution of the sample. The color of the pH indicator paper is compared to the color matching chart given on the wrapping. | ||
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'''or''' | '''or''' | ||
The powdered sample is dispersed on a previously slightly wetted (with distilled or deionized water) pH indicator paper. The pH value in the vicinity of individual grains of the powder can be observed. This can be helpful when dealing with salt mixtures containing both alkaline earth metal sulfates and alkali carbonates.[ | The powdered sample is dispersed on a previously slightly wetted (with distilled or deionized water) pH indicator paper. The pH value in the vicinity of individual grains of the powder can be observed. This can be helpful when dealing with salt mixtures containing both alkaline earth metal sulfates and alkali carbonates.<ref>[[Micro-chemical_testing#Interpretation_of_the_results]]</ref> | ||
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[[category:Bläuer,Christine]][[category:approved]][[category: microchemistry]] | |||
Revision as of 10:39, 20 September 2013
Author:Christine Bläuer
back to Micro-chemical testing
Determination of pH
For more information on the required equipment and materials see Micro-chemical testing.
Analytical procedure
The 1-14 pH indicator paper is dipped into the aqueous solution of the sample. The color of the pH indicator paper is compared to the color matching chart given on the wrapping.
or
The powdered sample is dispersed on a previously slightly wetted (with distilled or deionized water) pH indicator paper. The pH value in the vicinity of individual grains of the powder can be observed. This can be helpful when dealing with salt mixtures containing both alkaline earth metal sulfates and alkali carbonates.[1]