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Don't the solutions come already made up and wouldn't one be at a pH of about 10 so it would be quite alkaline. But in any event you want to store the buffers in a container that will not react with acids or bases. I would think glass if you had to make up the solutions.
What came with the meter is powdered and requires mixing with distilled water. There's a 6.86 pH and a 4.00. I have glass canning jars but they have coated metal lids that I'm afraid would corrode. Just wondering how other folks deal with this.
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