Chromium (Cr), 1µg/ml in 2%-HNO3 / Water, 100ml

Antimony 10,000ug/ml, 100ml

Fluoride (F-), 1.0µg/mL in Water, 500ml

Sulfide (S), 1000µg/mL in Tr. NaOH / Water, 3 x 20ml