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Q: How much distilled water can be add to make a slurry without changing the pH test results?

A 1:2 ratio of sample-to-deionized water--distilled or reversed osmosis--can be used to create a slurry to test the pH of products like pickles. Purée the sample with the deionized water to create a smooth paste. Thin the paste, if needed. According to the Daily Brine, the sample may be diluted with up to 10x its weight with deionized water without affecting the pH level (e.g. 50 ml sample diluted with 500 ml water). 

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