Sherpa Level 1 Practice Exam

How often should pH meters be calibrated, and what standards should be used for calibration purposes?

Weekly, with one buffer solution. Monthly, with at least two buffer solutions. Daily, with at least two buffer solutions. Annually, with a single reference standard.

Correct Answer:

Daily, with at least two buffer solutions.

Explanation:

pH meters should be calibrated daily with at least two buffer solutions to ensure accuracy.

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