Ph metre

Are you planning something like this?

www.presens.de/.../sensors

Why is the word 'metre' used as the heading in this article? It should be 'meter'!  'Metre' is a unit of length, similar to a yard.  A 'Meter' is an instrument used to measure a quantity, as in 'thermometer' (measures temperature), 'voltmeter' (measures volts, surprise surprise) and 'speedometer'. It's bad enough seeing these words incorrectly used in low-quality newspapers, but to see it being done within a much-respected scientific discussion group is just too much...

Happy New Year everybody!

P.S. 'Year' is a unit of time, sometimes pronounced 'Yer', as in 'Woss yer name?'

It's french. Thermometer = thermomètre, voltmeter = voltmètre and pH meter = pH-mètre.

Wikipédia

He doesn't want to have to clean the pH electrodes.

And here in the US... meter is also how we spell the unit of length.   It's just our rebellious nature.  
I've gotten the colour/color thing down, but I still haven't figured out the grey/gray thing.  And I've jokingly said aluminum wrong for so many years that I can't say it right to save my soul.  Or it that sole...

Yes, it is something like this, but it is more professional and simple and useful because my sample is cake cream. The measurement needs to be more practical and easy, and at the same time, it should be a clear measurement, just like a digital pH meter.

1. I want to clean pH probes with a simple method, but I could not find a simple and effective method. I can only do this with ultrasonic cleaners. I don't know what liquid to use for this.

can you leave a link

kmikemoo said:

And I've jokingly said aluminum wrong for so many years that I can't say it right to save my soul.

 kmikemoo  I recall lexicographer Susie Dent discussing this one on several occasions.

At one time British English also used 'aluminum' in order to match the ending of the likes of 'platinum' but then later on changed it to 'aluminium' to match the endings of  the likes of 'magnesium' and 'potassium'.

kmikemoo said:

I've gotten the colour/color thing down

Similar sort of story there with both forms being in common use up until around the time Samuel Johnson attempted to standardise spelling. Then Noah Webster came along and attempted to simplify spelling by removing superfluous letters...

An ultrasonic cleaner is quite simple and straightforward to use and your lab should already have one and buffer solution. I already answer this question in private: 

24 Dec 2024

• • 2:07 PM

  Miraç keyvan

  Actually, I'm wondering if a normal pH sensor probe can be cleaned in an ultrasonic cleaner.
• • 2:23 PM

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  anniel747

  Yes, you can clean a pH sensor probe in an ultrasonic cleaner.
• • 4:00 PM

  Miraç keyvan

  Thank you very much. So, what temperature should it be? How many kHz should the liquid inside be? Is tap water acceptable as a cleaning fluid or what kind of liquid should be used?
• • 4:31 PM

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  anniel747

  Use warm (~120°F) 4.0 molar KCI (potassium chloride) solution or warm 4.01 pH buffer solution for pH electrodes unless you have a specific contaminant. Variable frequency ultrasonic cleaners are best. Only deionized or distilled water should be used for rinsing.
• • 4:39 PM

  Miraç keyvan

  Thank you very much, I have a few more questions for you. I'm sorry, I'm taking your time. I'm testing an oily and sticky sample, cake cream, so I use it with a probe test 15 times a day.

• • 4:50 PM

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  anniel747

  Can you give a list of ingredients? Oil is better cleaned 1% (0.5N) HCl solution unless heavy contamination.
• • 5:00 PM

  Miraç keyvan

  pastry cream pH range is 7.0 to 5.0, milk, egg, sugar, starch are used, margarine, vanillin, liquid cake whipped cream, these are:

• anniel747

  I would use warm 4.01 pH buffer solution as a start and see if there is specific residual contaminants.
• • 5:12 PM

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  anniel747

  You should copy this conversation in the public thread, others may have expertise in the food industry.
• • 5:12 PM

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  anniel747

  I don't.
• • 5:13 PM

  Miraç keyvan

  So, would it be a problem if we drop liquid detergent into tap water and clean it with an ultrasonic cleaner?
• • 8:12 PM

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  anniel747

  Yes.
• • 10:22 PM

  Miraç keyvan

  How can this be a problem?

• 25 Dec 2024
• • 12:43 PM

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  anniel747

  Tap water is dommageable to pH electrodes and has it's own contaminants.
• • 1:18 PM

  Miraç keyvan

  So, is there an easier, more practical way to clean this probe?
• • 1:27 PM

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  anniel747

  Yes, use warm 4.01 pH buffer solution.
• • 1:27 PM

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  anniel747

  https://ca.hach.com/buffer-solution-ph-4-01-0-02-4-l/product-details?id=14533970669#