An assessment of an automated fluorimetric blood phenylalanine technique for phenylketonuria screening and for accurate estimations

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Abstract
An assessment of the automated fluorimetric technique for the estimation of phenylalanine, using blood collected and stored on filter paper, indicated that its accuracy and precision compared favourably with those of other methods, including the bacteriological inhibition assay. The method appeared to offer advantages, both in the detection of phenylketonuria and for the more accurate determinations required in the further investigation and control of known cases.