"orange de méthyle"

This is a complete set of all the solutions required for routine pH measurement.

High quality reagents that are pre-measured, allowing for users to achieve fast and accurate colorimetric measurements.

CHEMets® Chlorine Visual HR Test 0 to 25 ppm

This product is a refill for K-7404 Ozone CHEMets visual kit for the analysis of ozone in water. It contains 30 self-filling CHEMets ampoules packaged securely in cardboard trays and box. R-7404 Ozone CHEMets refill is compatible with C-7404 low range ozone comparator and C-7405 high range ozone comparator.

The NED method is widely used in the quantitative analysis of nitrite and nitrate in water samples. NED readily undergoes a diazonium coupling reaction in the presence of nitrite to give a strongly colored pink azo compound. The intensity of the color is directly proportional to the concentration of nitrite in the sample. Due to the significant intensity of the developed color even at very low nitrite/nitrate concentrations, lower detection limits and measurement ranges are possible vs. chromotropic acid kits. In addition, the nitrate measurement uses only zinc which is less toxic than cadmium, making handling and disposal safer.

Low dissolved oxygen levels in surface water systems usually indicate serious pollution

Kit provides measurement of ortho- (reactive) and meta- (condensed) phosphate (requires hot acid digestion).

Dissolved Oxygen in water test kits for environmental and drinking water applications (ppm range) employ the indigo carmine method. The reduced form of indigo carmine reacts with D.O. to form a blue product. The indigo carmine methodology is not subject to interferences from temperature, salinity, or dissolved gases such as sulfide, which plague users of D.O. meters.

Most natural waters range from pH 4 to pH 9, but commonly are above pH 7 because of carbonates and bicarbonates (alkalinity).

Easy way to test water for carbon dioxide concentration.

Easy way to test plant samples for their required macronutrients.

Easy way to test soil for the macronutrients that grow healthy plants.

Easy way to test urban water for multiple factors.

The Backpack Lab is designed for educators and environmental science students, containing lessons, activities, and test kits that relate to important parameters evaluated in marine science.

Test method: The Peracetic Acid CHEMets® test kit (0 to 1 and 0 to 5 ppm) employs the DPD chemistry. The sample is treated with an excess of potassium iodide. Peracetic acid oxidizes the iodide to iodine. The iodine then oxidizes DPD (N,N-diethyl-p-phenylenediamine) to form a pink colored species in direct proportion to the peracetic acid concentration. Various oxidizing agents such as halogens, ferric ions and cupric ions will produce high test results. Hydrogen peroxide does not interfere with this test if present at levels comparable to the peracetic acid levels.

This kit requires the use of the V-2000 or V-3000 Photometer, a SAM Photometer or a spectrophotometer capable of accepting a 13 mm diameter round cell.