| Package | packet |
|---|---|
| Quantity | 100 tests |
| Method | Adaptation of USEPA method 315B and Standard Method 3500-Fe B. The reaction between iron and the phenanthroline reagent causes an orange tint in the sample. |
| Package | packet |
|---|---|
| Quantity | 100 tests |
| Method | Adaptation of USEPA method 315B and Standard Method 3500-Fe B. The reaction between iron and the phenanthroline reagent causes an orange tint in the sample. |