Hanna Instruments HI83325 Instruction Manual page 22

Recommended Procedures/Dilutions According to Nutrient Concentration:
Parameter Estimated Concentration
Ammonia
Nitrate
Phosphorus
Potassium
The concentration of the micro-nutrients (calcium, magnesium, sulfate) is low enough in most
samples that dilution is typically not required. If necessary, a dilution procedure can be used for these
parameters as well.
22
< 2.5 ppm NH -N
3
2.5 - 9 ppm NH -N
3
9 - 100 ppm NH -N
3
< 25 ppm NO -N
3
25 - 130 ppm NO -N
3
130 - 300 ppm NO -N
3
< 9 ppm P
3-
(< 27 ppm PO )
4
9 - 45 ppm P
3-
(27 - 135 ppm PO )
4
45 - 100 ppm P
3-
(135 - 300 ppm PO )
4
< 18 ppm K
18 - 90 ppm K
90 - 180 ppm K
180 - 1000 ppm K
Dilution Method
Factor Selection
No dilution Ammonia LR
No dilution Ammonia MR
No dilution Ammonia HR
No dilution Nitrate
5 Nitrate
10 Nitrate
No dilution Phosphate HR
5 Phosphate HR
10 Phosphate HR
No dilution Potassium
5 Potassium
10 Potassium
50 Potassium
Typical Usage
Irrigation Water
Irrigation Water
Recycled Nutrient Solution
Fresh Nutrient Solution
Irrigation Water
Recycled Nutrient Solution
Fresh Nutrient Solution
Irrigation Water
Recycled Nutrient Solution
Fresh Nutrient Solution
Irrigation Water
Recycled Nutrient Solution
Fresh Nutrient Solution
Fresh Nutrient Solution