As @ 1000 µg/mL in 5% HNO3, 100ml

Method 200.8/1638/1640 Internal Standard, 10µg/ml in 2%-HNO3, 4x25ml

Mo, 1000 µg/mL in 5% HNO3, tr. HF, 100ml

Nitrite Standard: NO2-, 1000µg/mL iin Water, 100ml