RT Journal Article SR Electronic T1 Shelf Life of Some Common Winery Laboratory Reagents JF American Journal of Enology and Viticulture JO Am J Enol Vitic. FD American Society for Enology and Viticulture SP 159 OP 163 DO 10.5344/ajev.1982.33.3.159 VO 33 IS 3 A1 B. A. Bruer A1 D. R. G. Bruer A1 C. J. Brien YR 1982 UL http://www.ajevonline.org/content/33/3/159.abstract AB Storage times of some common laboratory reagents have been determined. Solutions of 0.057N Na2S2O3 in 0.05N NaOH, 0.1N I2, 0.68N K2Cr2O7 in 12N H2SO4 and commercial pH 4.01 and 7.00 buffers keep with no apparent deterioration for at least 90 days. The deterioration of the Fehlings A and B solutions stored separately in the dark over a 96 day interval was not chemically significant. Significant deterioration was apparent in 0.1N NaOH, 0.01N NaOH 0.34N FeSO4 (NH4)2 SO4 in 2N H2SO4, Fehlings A and B (stored separately in the light) and the Soxhlet solutions. Deterioration of 0.3% H2O2 was found after storage for 90 days; however, this decrease would not affect the quantitative recovery of SO2 in a wine of 150 mg/L total SO2 if the aspiration method of analysis was used.