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Topic: Formic acid  (Read 3436 times)

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Offline Naaga

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Formic acid
« on: July 14, 2023, 02:14:42 AM »
Hey,
I'm analyzing formic acid in a sample and using a standard curve to do so. But the standard curve is made with a Formate standard. Since this is the base of formic acid, do I need a correction factor in the calculation? And if so what is this factor?

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Offline Hunter2

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Re: Formic acid
« Reply #1 on: July 14, 2023, 05:55:33 AM »
What is your method and what kind of method you talking about. Normally you can do alcaline  titration with NaOH or also redox titration with Permanganate.
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Offline Naaga

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Re: Formic acid
« Reply #2 on: July 14, 2023, 05:59:23 AM »
Its on HPLC  :) therefore i need the standard curve
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Offline Hunter2

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Re: Formic acid
« Reply #3 on: July 14, 2023, 06:02:22 AM »
Why not run a blank sample with known content of HCOOH. Or calibrate with an acidic Standard.
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Offline Naaga

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Re: Formic acid
« Reply #4 on: July 14, 2023, 08:28:25 AM »
That woruld be easier, but i dont have any. That's why I tried with the base.
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Offline Babcock_Hall

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Re: Formic acid
« Reply #5 on: July 14, 2023, 01:59:00 PM »
Is there acid in the mobile phase?  This might make a difference, but I am not sure.
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Offline Borek

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Re: Formic acid
« Reply #6 on: July 15, 2023, 02:21:33 PM »
Quote from: Naaga on July 14, 2023, 08:28:25 AM
That woruld be easier, but i dont have any. That's why I tried with the base.

If samples are always buffered at the same pH ratio of HA/A- is always the same.
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