Can I determine nitrate in units other than ppm nitrate-N using NECi NTK Systems?
2.11 A: Yes, 1 ppm nitrate-N is equal to 4.4 ppm nitrate or 71 M nitrate. You can also determine nitrate as a quantity since this is related to the volume of sample used in the NTK System. In the Standard Range NTK series, 1 ppm nitrate-N is 3.55 nmole nitrate (0.05 ml sample * 71 M nitrate). In the Low Range NTK series, 1 ppm nitrate-N is 35.5 nmole nitrate (0.5 ml * 71 M). In the Standard Range NTK microplate kit, 1 ppm nitrate-N is 0.72 nmole nitrate (0.01 ml * 71 M). In the Low Range NTK microplate kit, 1 ppm nitrate-N is 3.55 nmole nitrate (0.05 ml * 71 M).
