H2O2 Field Methods and Test Kits
The table below lists several easy-to-use products for measuring H2O2 residuals in the field. The more appropriate selection will depend on a number of factors including the concentration of H2O2 expected, the potential for interfering substances in the water, and the frequency of analysis. Note that the upper limit of each detection range is somewhat artificial, since higher concentrations of H2O2 may be determined by diluting the sample.
| | Test Strips | Test Kits |
|---|
| Manufacturer | EM Science | Macherey-Nagel | CHEMetrics | LaMotte | Hach |
|---|
| Source | Lab Safety Supply | Scientific Products | CHEMetrics | LaMotte | Hach |
|---|
| Basis | Peroxidase enzyme | Starch-Iodide | Iron Thiocyanate | DPD | Starch-Iodide, Thiosulfate |
|---|
| Method | Color comparison | Color comparison | Ampule color comparator titration | Disk color | Drop count colorimetric comparator |
|---|
| Range, mg/L | 0.5-25 | 3-100 | 0.05-10 | 0.1-40 | 0.2-10 |
|---|
| Interferences | None likely or reducing agents | Oxidizing or reducing agents | Oxidizing or reducing agents | Oxidizing or reducing agents | Oxidizing or reducing agents |
|---|
| Ease of Operation | Very easy | Very easy | Easy | Moderate | Moderate |
|---|
| Product Name | Merckoquant Peroxide Test | Quantofix Peroxide | Peroxide Test Kit | Peroxide DPD Tablet | Model HYP-1 |
|---|
| Manufacturer No. | 10011-1 | 91312 | K-5510 | 3138 | 22917-00 |
|---|
| Unit | Tube of 100 strips | Tube of 100 strips | 30 ampules | Kit of 50 tests, refills available | Kit of 100 tests |
|---|
| Cost | $41.65 | $22.40 | $50.30 | $32.25 | $40.50 |
|---|
| Comments | Semi-quantitative, loses accuracy with age - must be refrigerated | Semi-quantitative, interferences may cause problems | Quantitative, poor sensitivity in lower ranges, interferences are common | Quantitative, poor sensitivity in lower ranges, interferences are common | Quantitative, interferences may cause problems |
|---|
Manufacturers and Sources
EM Science (division of EM Industries, Inc.). 480 N. Democrat Road, Gibbstown, NJ 08027. (856) 423-6300.
Lab Safety Supply. P.O. Box 1368, Janesville, WI 53547-1368. (800) 356-0783.
Scientific Products (division of Baxter Diagnostics). 1430 Waukegan Road, McGaw Park, IL 60085-6787. (800) 234-5227.
CHEMetrics, Inc. 4295 Catlett Road, Calverton, VA 22016. (800) 356-3072.
Hach Company, P.O. Box 608, Loveland, CO 80539-0608. (800) 227-4224.
LaMotte, Inc. Chestertown, MD 21620. (410) 778-3100.