A blank value in

analytical chemistry Analytical skill, Analytical chemistry studies and uses instruments and methods to Separation process, separate, identify, and Quantification (science), quantify matter. In practice, separation, identification or quantification may constitute t ...

is a measurement of a

blank Blank or Blanks may refer to: *Blank (archaeology), a thick, shaped stone biface for refining into a stone tool *Blank (cartridge), a type of gun cartridge *Blank (Scrabble), a playing piece in the board game Scrabble *Blank (solution), a solutio ...

. The reading does not originate from a sample, but the

matrix effect In chemical analysis, matrix refers to the components of a sample other than the analyte of interest. The matrix can have a considerable effect on the way the analysis is conducted and the quality of the results are obtained; such effects are call ...

reagent In chemistry, a reagent ( ) or analytical reagent is a substance or compound added to a system to cause a chemical reaction, or test if one occurs. The terms ''reactant'' and ''reagent'' are often used interchangeably, but reactant specifies a ...

s and other residues. These contribute to the sample value in the analytical measurement and therefore have to be subtracted. The limit of blank is defined by the Clinical And Laboratory Standards Institute as the highest apparent analyte concentration expected to be found when replicates of a sample containing no analyte are tested.

References

Analytical chemistry {{analytical-chem-stub

See also

References