Section 144-267-4 - ANALYSIS OF BLOOD AND BREATHA. All blood specimens received by the laboratory should be refrigerated until the analysis has been performed.B. Replicate analyses are recommended in order to minimize the possibility of undetected errors.C. Results should be expressed in terms of % w/v, that is, grams of alcohol per 100 milliliters of blood, rounded downward, to the second decimal place; for example, 0.237% should be reported as 0.23%.D. Analytical procedure for determining alcohol in blood should meet the following performance requirements: (1) The accuracy and sensitivity of the procedure should be such as consistently to attain results within 10% of the known value over the range of 0.10% and greater, or + 0.01% w/v of the known value for values less than 0.10%, in the analysis of appropriate reference materials of known ethyl alcohol concentration for blood determinations.(2) The accuracy and sensitivity of the procedure should be such as consistently to attain results within 15% of the known value over the range of 0.10% and greater, or + 0.015% w/v of the known value for values less than 0.10%, in the analysis of appropriate reference materials of known ethyl alcohol concentration for breath determinations.(3) The blank values yielded by the procedure in analyses of alcohol - free blood or breath specimen consistently should be not greater than 0.01%.10- 144 C.M.R. ch. 267, § 4