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Illinois Fertilizer Conference Proceedings
January 23-25, 1995

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Table 4: Effect of Cl and NO2 on NO3-N analyses with the Cardy Nitrate Meterspacer

Prepared Concentration of
Interfering Ion (ppm)		 NO3-N Recovered
Soil #3 Soil #4 Soil #7 Soil #8 Soil #9
------------- ppm (NO3-N) -------------
Cl
0 0 5 9 15 20
25 1 5 11 15 20
50 1 6 11 14 20
100 2 6 11 15 20
200 3 7 12 15 21
400 6 9 13 17 21
800 9 13 15 20 26
1600 14 19 24 26 29
NO2
0 0 5 10 15 20
25 1 5 11 15 20
50 2 6 11 17 21
100 4 7 14 18 22
200 6 11 16 20 24
400 13 18 20 24 29
800 20 25 30 33 40
1600 39 43 45 49 51

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