Parameter |
Container |
Preservative 1 |
Maximum Holding Time 2 |
---|
Nitrate + Nitrite |
100 ml. poly |
cool 4°C, H2SO4 to pH<2 |
28 days |
Ammonia |
100 ml. poly |
cool 4°C, H2SO4 to pH<2 |
record pH and temp. at time of collection 28 days |
Base Neutral Pesticides (MDA List 1) |
1000 ml. amber glass |
cool 4°C |
follow applicable method holding times |
Acid Pesticides (MDA List 2) |
1000 ml. amber glass |
cool 4°C, H2SO4 to pH<2 |
follow applicable method holding times |
Carbamates (MDA List 3) |
1000 ml. amber glass |
cool 4°C, 5 mls. of 1% phosphoric acid |
follow applicable method holding times |
Pentachlorophenol |
1000 ml. amber glass |
cool 4°C, H2SO4 to pH<2 |
7 days until extraction |