0.10 N KMnO4 Standard Soln.

BHC (beta isomer-13C6), 50µg/ml in Nonane, 2x1,2ml

Stigmastanol

2,3,4,6,9-Pentachlorodibenzofuran (or 1,4,6,7,8), 1.2ml x 50ug/ml, nonane