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Home  >  Colorimetry Reagents

Colorimetry Reagents

Colorimetry Reagents

For centuries scientists have used a colorimetric reagent to determine quality in compounds. Technology has made using a colorimetric reagent a bit easier but no less potent. Colorimetry tests are quick and easy and often cost less than alternative test methods. A colorimeter is an optical measurement that uses color to quantitatively determine the concentration of a compound in a sample. A colorimetric reagent for the compound of interest is added to the sample being tested. A color will develop in proportion to the level of compound present, and can be measured by the instrument. Many parameters have EPA approval and meet the regulatory requirements for many industries. Choose from single parameter or multiparameter colorimeters to meet your application. The process is founded upon Beer's Law; which describes the relationship between the amounts of light transmitted and the concentration of the sample. The typical instrument used in this process has one or more fixed wavelengths--to match the maxima (strong peak) of the components spectrum. In free chlorine the DPD spectrum has a maxima peak near 520nm, the wavelength for the test. If you want more information about selecting the right colorimetric reagent for your application contact a Cole-Parmer Technical Expert today.
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Representative photo only DPD Total Chlorine Reagent Powder Pillow Packs 25 mL 1000 Tests

DPD Total Chlorine Reagent Powder Pillow Packs, 25 mL, 1000 Tests

Product Type Water Testing Kit,Model RP013-3
EW-99560-61
Usually ships in 7 days.
$186.00 USD/PACKAGE

Qty:

Representative photo only DPD Free Chlorine Reagent Powder Pillow Packs 10 mL 1000 Tests

DPD Free Chlorine Reagent Powder Pillow Packs, 10 mL, 1000 Tests

Product Type Water Testing Kit,Model RP010-3
EW-99560-55
In stock.
$175.00 USD/PACKAGE

Qty:

Representative photo only Replacement total chlorine test kit for Oakton colorimeters 100 tests kit

Replacement total chlorine test kit, for Oakton colorimeters, 100 tests/kit.

Product Type Water Testing Accessories,Brand Oakton
EW-35645-66
In stock.
$27.00 USD/EACH

Qty:

Representative photo only Replacement free chlorine test kit for Oakton colorimeters 100 tests kit

Replacement free chlorine test kit, for Oakton colorimeters, 100 tests/kit.

Product Type Water Testing Accessories,Brand Oakton
EW-35645-64
In stock.
$27.00 USD/EACH

Qty:

Representative photo only DPD Total Chlorine Reagent Powder Pillow Packs 10 mL 1000 Tests

DPD Total Chlorine Reagent Powder Pillow Packs, 10 mL, 1000 Tests

Product Type Water Testing Kit,Model RP012-3
EW-99560-59
Usually ships in 6 days.
$175.00 USD/PACKAGE

Qty:

EW-99574-04 Hach<small><sup>&reg;</sup></small> Test Kits

Hach Free Chlorine (USEPA) Test Kit

Product Type Water Testing Kit,Range 0 to 2.0 ppm,Model 21055-69
EW-99574-04
In stock.
$24.00 USD/EACH

Qty:

Representative photo only DPD Free Chlorine Reagent Powder Pillow Packs 10 mL 100 tests

DPD Free Chlorine Reagent Powder Pillow Packs, 10 mL, 100 tests

Product Type Water Testing Kit,Range 0 - 2.00,Model RP010-0
EW-99560-54
In stock.
$20.00 USD/PACKAGE

Qty:

Representative photo only Replacement pH test kit for Oakton colorimeter 50 tests kit

Replacement pH test kit, for Oakton colorimeter, 50 tests/kit.

Product Type Water Testing Accessories,Brand Oakton
EW-35645-60
In stock.
$25.50 USD/EACH

Qty:

EW-99574-14 Hach<small><sup>&reg;</sup></small> Test Kits

Hach Total Nitrogen (TNT) Test Kit

Product Type Water Testing Kit,Range 0 to 25 ppm,Model 26722-45
EW-99574-14
Usually ships in 6 days.
$159.00 USD/EACH

Qty:

Representative photo only DPD Powder Pop Dispenser for Free Chlorine 1000 Tests 10 mL

DPD Powder Pop Dispenser for Free Chlorine, 1000 Tests, 10 mL

Product Type Water Testing Kit,Model 10504C,Brand DPD Powder Pop
EW-99560-16
In stock.
$161.00 USD/PACKAGE

Qty:

Representative photo only Total Phosphate Reagent Set 50 Tests

Total Phosphate Reagent Set, 50 Tests

Product Type Water Testing Kit,Model Rs5210
EW-99560-79
Usually ships in 5 days.
$51.50 USD/PACKAGE

Qty:

EW-99574-11 Hach<small><sup>&reg;</sup></small> Test Kits

Hach High-range Nitrate Test Kit

Product Type Water Testing Kit,Range 0 to 30 ppm,Model 21061-69
EW-99574-11
In stock.
$47.00 USD/EACH

Qty:

Representative photo only DPD Powder Pop Dispenser for Free Chlorine 1000 Tests 5 mL

DPD Powder Pop Dispenser for Free Chlorine, 1000 Tests, 5 mL

Product Type Water Testing Kit,Model 10500C,Brand DPD Powder Pop
EW-99560-12
Usually ships in 6 days or sooner.
$140.00 USD/PACKAGE

Qty:

EW-99560-11 DPD Powder Pop<small><sup>&reg;</sup></small> Dispenser for Free Chlorine, 100 Tests, 5 mL

DPD Powder Pop Dispenser for Free Chlorine, 100 Tests, 5 mL

Product Type Water Testing Kit,Model 10500,Brand DPD Powder Pop
EW-99560-11
Usually ships in 8 days or sooner.
$16.50 USD/EACH

Qty:

Representative photo only DPD Powder Pop Dispenser for Total Chlorine 1000 Tests 5 mL

DPD Powder Pop Dispenser for Total Chlorine, 1000 Tests, 5 mL

Product Type Water Testing Kit,Model 10502C,Brand DPD Powder Pop
EW-99560-14
Usually ships in 7 days.
$140.00 USD/PACKAGE

Qty:

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