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commonaskedquestions_ise [22/02/2019 10:54] pieter |
commonaskedquestions_ise [22/02/2019 10:55] (current) pieter [How often do you need to calibrate?] |
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=====Frequently Asked Questions (Ion-selective electrodes)===== | =====Frequently Asked Questions (Ion-selective electrodes)===== | ||
====How often do you need to calibrate? | ====How often do you need to calibrate? | ||
- | Calibrate at least once a week, preferred is **daily**. Calibrate if in doubt of your results being accurate or reproducible. Check the manual for more information on each ISE about the expected stability. When subject to temperature changes, mind that a difference of 1°C causes a measurement error of 2%. | + | Calibrate at least once a week, preferred is **daily**. Calibrate if in doubt of your results being accurate or reproducible. When subject to temperature changes, mind that a difference of 1°C causes a measurement error of 2%. Check the manual for more information on each ISE about the expected stability. |
====How long after being opened or made are standards good?==== | ====How long after being opened or made are standards good?==== | ||
The stock standard will last at least six months before discarding, whereas diluted standards treated with ISA/pH buffer should be prepared weekly. | The stock standard will last at least six months before discarding, whereas diluted standards treated with ISA/pH buffer should be prepared weekly. |