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Topic: Groundwater analysis  (Read 5446 times)

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Groundwater analysis
« on: October 26, 2005, 10:37:30 AM »
For the determination of CHLORIDE I use the argentometric/chromate method of Mohr.
Question:  Does the presence of sulfate (precipitation of silver sulfate) affect the results, giving a too high chloride content?  If so, should I first analyse for sulfate, then subtract the equivalent from the chloride result?

Offline Borek

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Re:Groundwater analysis
« Reply #1 on: October 26, 2005, 11:07:38 AM »
Perhaps you can precipitate sulfates adding barium nitrate?
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Offline Alberto_Kravina

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Re:Groundwater analysis
« Reply #2 on: November 07, 2005, 12:19:26 PM »
Yes! You can analyze the sulfates by precipitation with BaCl2, or Barium nitrate, it's the same thing.
If you want to do a quantitative analysis you can determine the grams/L (or moles/L) of sulfate by gravimetric.


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Re:Groundwater analysis
« Reply #3 on: November 15, 2005, 01:15:54 PM »
Adding barium nitrate is a better idea, since by adding barium chloride you are importing chloride ions (one more step in calculation, one more source of uncertainty)

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