Question

what do you mean by external standard calibrations
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Answer 1

Answer:

external standard quantitation, known data from a calibration standard and unknown data from the sample are combined to generate a quantitative report. It is called external standard because the standard or known material is separate or external to the unknown material.

Answer 2

External calibration requires optimal settings and proper care of both balance and weights. It's quick and easy, but requires diligence to maintain optimal calibration.

hope it helps :)