An interlaboratory trial of the quantitation of Hb A(2) and Hb F has been carried out on two samples of blood by 90 laboratories in the British Isles. The results have been compared with those obtained by four reference laboratories. Overall, the correlation was very poor and indicated that the methods used have to be standardized before interlaboratory values become meaningful. Moreover, in ma...

Results of interlaboratory comparisons and proficiency tests are a significant parameter for the calibration testing laboratories assuring quality test results performed by those laboratories. Accredited non-accredited that have system their working areas expected to join into inter-comparisons in certain periods show degree equivalence among participant assure service quality. The necessity pa...

A small regional survey of direct spectrophotometric methods and a larger Australian and New Zealand survey of paediatric bilirubin analyses are described. The overall performance of both groups was unsatisfactory with an unacceptable high interlaboratory variation. This interlaboratory variation was reduced significantly by the use of a spectrophotometric method with a common standard of methy...