Solution for calibrating a chemical analyzer for alcohol, carbonate and ammonia assays

Abstract

A multi-analyte calibration solution having known amounts of sodium carbonate, ammonium bicarbonate, and ethyl alcohol, with pH adjusted within a range between about 7.8 and 8.4.

1 . (canceled)  
     
     
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         3 . A stable liquid multi-analyte calibration solution for use in an immunoassay for measuring an amount of blood alcohol, total serum carbonate, and blood ammonia in a test sample, wherein said calibration solution comprises known amounts of sodium carbonate, ammonium bicarbonate, and ethyl alcohol, has a pH from 7.8 to 8.4, and remains stable for a period of at least three hundred (300) days when stored at a temperatures about 4° C.  
     
     
         4 . The calibration solution of  claim 3  further comprising a preservative selected from the group consisting of an antibiotic isolated from strains of  Bacillus polymyxa,  sodium pyrithione and polyhexamethylene biguanide.