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

Complex Cyanide (CN-), 1000µg/ml in Tr. NaOH / Water, 100ml

Nitrate (NO3-) as N, 1000µg/mL in Water, 500ml

4-Chlorophenol solution, 200mg AOX/l, 100ml