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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: xshadow on May 30, 2021, 04:34:51 AM

Title: determination of Cl-, NO3- and SO42- in water (IC)
Post by: xshadow on May 30, 2021, 04:34:51 AM

HI
I wonder if there are other analytical techniques used for determination of salts in water other than ionic chromatography (IC) ...

Thanks

Title: Re: determination of Cl-, NO3- and SO42- in water (IC)
Post by: Borek on May 30, 2021, 05:10:33 AM

A lot depends on the concentration, but nothing stops you from you using classical methods, like gravimetry and titration.

Title: Re: determination of Cl-, NO3- and SO42- in water (IC)
Post by: xshadow on May 31, 2021, 06:05:23 AM

Quote from: Borek on May 30, 2021, 05:10:33 AM

A lot depends on the concentration, but nothing stops you from you using classical methods, like gravimetry and titration.

Using tritation are Cl- NO3-  titrated  separately ??
thanks :)

( anyway concentration around 3/3.5 mg/l )

Title: Re: determination of Cl-, NO3- and SO42- in water (IC)
Post by: Orcio_87 on May 31, 2021, 09:09:26 AM

@xshadow

- Cl^- - titration with AgNO₃ (with K₂CrO₄ as indicator)
- SO₄^2- - precipitation to BaSO₄ (gravimetry)
- NO₃^- - formation of nitrosalicylic acid which give intense yellow colour (spectrophotometry)

Title: Re: determination of Cl-, NO3- and SO42- in water (IC)
Post by: Borek on May 31, 2021, 10:51:36 AM

Quote from: xshadow on May 31, 2021, 06:05:23 AM

( anyway concentration around 3/3.5 mg/l )

Well, you haven't said that earlier. That's way too low for classic methods.

Title: Re: determination of Cl-, NO3- and SO42- in water (IC)
Post by: xshadow on June 02, 2021, 03:44:14 PM

Thanks :)