Abstract
The committee for laboratory data standardization of Tokyo Metropolitan Association of Medical Technologists conducts an annual quality control survey using human fresh materials to evaluate testing data from participating institutions without distinct machines and reagents. However, in serum albumin testing, there is a significant difference between values of the bromocresol green (BCG) method and those of the modified bromocresol purple (BCP) method; this testing item was not evaluated for the past two years. In this report, we analyzed the serum albumin data from the surveys conducted in 2010 and 2011. As a result, there was a large difference between the data obtained by the two methods; the difference was smaller in 2011 than in 2010. The ratio of α-globulin in survey samples was smaller in 2011 than in 2010, and similar to the ratio in each manufacturer’s standard product. Moreover, there was an obvious difference among values obtained by the modified BCP method. It is our mission to elucidate the cause of the data difference among reagents based on the modified BCP method and to further standardize serum albumin measurement.
