Division 9.1 Because of differences between amino acid analysers the final concentrations of the calibration solutions of standard amino acids (see 3.27.4 and 3.27.5) and of the hydrolysate (see 5.3.4) shall be taken as a guideline.
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The range of linear response of the apparatus has to be checked for all amino acids.
The standard solution is diluted with citrate buffer to give peak areas in the middle of the range.