Qualidade Do Leite Cru Refrigerado Avaliado Por Diferentes Laboratórios Credenciados Pelo MAPA

The objective of this study was to analyze and to correlate the results of refrigerated raw milk quality in ten farms of Viçosa (MG).The milk was analyzed by the Ministério da Agricultura, Pecuária e Abastecimento standard methods and by infrared spectrophotometers in three laboratories (A, B and C) accredited by the same institution.The milk samples were analyzed for bacterial counts, somatic cell count (SCC) and fat, protein and solids not fat (SNF) tenors.There were no disagreement milk samples as the protein and fat tenors.Different percentages of disagreement were observed between the results of laboratory and standard method as the SCC, bacterial count and SNF tenor.The protein mean tenor of A and B laboratories and the SNF mean tenor of all laboratories were not statistically equal (p<0.05) the tenors obtained by standard method.The fat tenors obtained in B laboratory were not statistically correlated (p>0.05) with tenors obtained by the standard method.It was observed that the means of SCC and bacterial counts of all laboratories were statistically the same (p>0.05)and correlated (p<0.05) to the means counts obtained by standard methods.It is concluded that the protein tenors in two laboratories and SNF in all laboratories are not equivalent with the reference methods of MAPA.It is important that laboratories review the calibration of the equipment on the quantification of milk solids tenors.