試題詳解

15. Which of the following statements about the blank analysis is correct?
(A) An ideal blank should be free of matrix.
(B) An ideal blank is a solution containing solvents, reagents and analytes.
(C) A field blank should never leave the laboratory to avoid contamination.
(D) The step of blank analysis can be omitted if the sample solution is clear and homogeneous.
(E) The signal from the blank should be subtracted from that of the sample when determining the concentration of analyte.