Fluoride (F-), 10µg/mL in Water, 500ml

Nitrite (NO2-) as N, 1000µg/ml in Water, 100ml

Fe, 1000 µg/mL in 5% HNO3, 100ml

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