Nitrate pack test
1. Pull out the filament of tube’s tip.
2. Evict the air in the tube.
3. Insert the liquid which is detected, stop inhaling water when it is half around.
4. Rock 5 to 6 times slightly, after the specified time(pls rock 1 to 2 times in the halfway),compare with the standard colorimetric card.
Other product for nitrate test:
Nitrate test strip
Nitrate test kit
Nitrate test tube