When confirming the calibration results, first check whether all the parameters to be calibrated have been calibrated, whether the certificate reflects the standard value, sample value or sample error, etc. Pay attention to the following situations:

Some equipment requires multiple parameters to be calibrated. For example, the voltage machine cannot be calibrated for force alone. If the displacement and displacement rate have a significant impact on the test results, they should also be calibrated.

Some equipment may have different detection methods. For example, the atomic absorption spectrophotometer has two detection methods, the flame method and the graphite method. If two methods are used, the detector used in each method should be calibrated.

The calibration parameters of analytical instruments are usually the characteristic values of the instrument, such as detection limit, repeatability, measurement linearity, initial noise, baseline drift, wavelength, etc., which must be determined according to the different detection principles of the instrument. Instrument.