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How to test for sodium hydroxide residue in juice?


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#1 Rol Natty

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Posted 26 May 2020 - 08:43 PM

I prepare juice on a tank then by the operator fault the volume increased when see it so how can we know it is cip caustic soda solution or normal water the added by error i need ur help pls



#2 Rol Natty

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Posted 26 May 2020 - 08:46 PM

The volume that i prepare is 4300 liter of mango juice when we after 8 hour it increased to 4850 liter i think some cip ( causti soda solution or Ro water inserted by the operator fault how can i verify it pls urgently i ask the operator but they told me that they dont know about it



#3 pHruit

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Posted 27 May 2020 - 07:45 AM

As a rudimentary test, NaOh is alkaline and would therefore be expected to raise the pH of your product, so before/after comparison of the pH results might give you an indication. Whether it will be sufficient to discern anything useful is another question...

It may also have an impact on the colour and aroma (and possibly taste, but I'm not sure if you really want to drink it to find out?!) of the blend.

Depending on how your CIP system is set up, you may be able to check if there is "missing" volume of around 550L there?

 

Unfortunately I'd suggest that as a general principle if something has been put into your product and you can't confirm exactly what it is, and particularly if you suspect that it could be something that definitely isn't suitable for consumption, then the product should probably be disposed of.



#4 Ryan M.

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Posted 28 May 2020 - 02:33 PM

Brix, titratable acidity, pH, sensory, density.  Compare to a control sample.






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