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Author Topic: Can i use PH meter to test coolant PH?  (Read 594 times)

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xchcui

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Can i use PH meter to test coolant PH?
« on: December 01, 2018, 05:17:40 AM »

Hi.

I saw on the web several cheap ph meters that are advertised as suitable for checking  PH of portable water,swimming pools,aquarium,food,beverage,in school laboratories etc.They usually come with ph buffer powder for calibration.On the attached photo you may see two types:the upper one is calibrated by a screwdriver (potentiometer) and the one below is calibrated automatic by the buttons.screwdriver(potentiometer) and the other is calibrated automatic by the buttons.
I know,according to wikipedia,that the ph meter:
Quote
...measures the hydrogen-ion activity in water-based solutions, indicating its acidity or alkalinity expressed as pH.The pH meter measures the difference in electrical potential between a pH electrode and a reference electrode, and so the pH...
Can this type(as in the photo)of PH meter be used to check
antifreeze/coolant 50/50(50% water/50% ethylene glycol)and give an accurate ph results?

Thanks.
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chenbeier

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Re: Can i use PH meter to test coolant PH?
« Reply #1 on: December 01, 2018, 05:48:22 AM »

I think it can, but why you need the pH in a coolant, there normaly no acids in. What is a  right pH in a coolant.  The glycol is a kind of alcohol.
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xchcui

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Re: Can i use PH meter to test coolant PH?
« Reply #2 on: December 01, 2018, 07:02:09 AM »

The PH value depends at the type of the coolant and it can be found in the coolant datasheet.If the PH decrease below a certain value(glycol breakdown),galvanic corrosion may happens.But this is not exactly the purpose of my question,i would like to focus on the PH meter,please.
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Borek

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Re: Can i use PH meter to test coolant PH?
« Reply #3 on: December 01, 2018, 10:47:32 AM »

Measuring pH of a solution that is only partially water is rather tricky - depending on the electrode it may give completely unreliable results.
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xchcui

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Re: Can i use PH meter to test coolant PH?
« Reply #4 on: December 02, 2018, 03:43:48 AM »

Measuring pH of a solution that is only partially water is rather tricky - depending on the electrode it may give completely unreliable results.
What about measuring ph of that partially water solution with PH strips?Are the pH strips a better option or will they experience the same
unreliable results as the pH meter?
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xchcui

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pH meter or pH strips for testing mixed aqueous/non-aqueous samples.
« Reply #5 on: December 03, 2018, 02:59:46 AM »

Hi.

I understand that pH meter may give a false results
in mixed aqueous/non-aqueous samples like in coolant/antifreeze(50/50).
Are the pH testing strips a better choice for that testing
or will they experience the same unreliable results as the pH meter?

Thanks.
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billnotgatez

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Re: Can i use PH meter to test coolant PH?
« Reply #6 on: December 03, 2018, 04:39:12 AM »

I merged your 2 topics since both have approximately the same question.

We only post a given question once on the forum.
This is a forum policy.
Click on the link near the top center of the forum page.
Forum Rules: Read This Before Posting.
http://www.chemicalforums.com/index.php?topic=65859.0
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xchcui

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Re: Can i use PH meter to test coolant PH?
« Reply #7 on: December 03, 2018, 05:13:56 AM »

I merged your 2 topics since both have approximately the same question.

We only post a given question once on the forum.
This is a forum policy.
Click on the link near the top center of the forum page.
Forum Rules: Read This Before Posting.
http://www.chemicalforums.com/index.php?topic=65859.0
Hi billnotgatez.

Do you refer to that rule?
Quote
4.6 Don't post more than once
I opened a new topic because no one replied to my new question,so i assumed that the new question should be asked in a new topic.
Okay,i guess i was wrong.
Thanks for your remark.
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xchcui

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Re: Can i use PH meter to test coolant PH?
« Reply #8 on: December 05, 2018, 12:18:18 AM »

Hi Borek.

From your experience,will the pH strips be a better option or will they experience the same unreliable results as the pH meter?
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Borek

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Re: Can i use PH meter to test coolant PH?
« Reply #9 on: December 05, 2018, 12:49:52 AM »

Hard to say, in general I wouldn't trust things designed to work in water when used in other solvents. They may work, they may not.
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xchcui

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Re: Can i use PH meter to test coolant PH?
« Reply #10 on: December 05, 2018, 04:34:58 AM »

Hard to say, in general I wouldn't trust things designed to work in water when used in other solvents. They may work, they may not.
Thanks,Borek.
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