Question: Pumps must be calibrated both when a sample is placed on a pump and when it is collected. Which of the following should be done

Pumps must be calibrated both when a sample is placed on a pump and when it is collected. Which of the following should be done if the initial calibration differs significantly from the final calibration reading? a. The average of the two readings should be taken and used to calculate the volume b. The first reading should always be used in all calculations c. The sample should not be sent for analysis because the result will not be reliable d. The rotometer should be replaced

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