DEHA Test Kits

Visual and Titrimetric Kits

Range MDL Method Type Kit Cat. No. Refill
0 - 400 & 400 - 3,000 ppb 15 ppb PDTS CHEMets K-3902 R-3902
25 - 250 ppm 25 ppm Ceric Sulphate Titrant with Ferroin Indicator Titrets K-3925

Instrumental Kit

Range Method Type Kit Cat. No.
0 - 2.00 ppm PDTS Vacu-vials K-3903

CHEMetrics offers test kits employing the well-known PDTS Method and also the innovative Ceric Sulphate Method to deliver sensitivity and accuracy within two minutes or less. Based on CHEMetrics patented Self-Filling Reagent Ampoule technology. Premixed. Premeasured. Precise. Each kit contains 30 tests. DEHA concentrations are routinely measured in waste water effluent, drinking water, surface water and sea-water.

The PDTS Method

The test kits employ the PDTS chemistry, in which DEHA reduces iron III (ferric state) to iron II (ferrous state), which readily reacts with PDTS (3-(2-pyridyl)-5,6-bis(4-phenylsulfonic acid)-1,2,4-triazine disodium salt) to form a pink-purple coloured complex in direct proportion to the DEHA concentration. Test results are expressed in ppb (µg/l) or ppm (mg/l) DEHA.

Reference:
G. Frederick Smith Chemical Co., The Iron Reagents, 3rd ed., p. 47 (1980).

The Ceric Sulphate Titrimetric Method

CHEMetrics developed a titrimetric method that employs a ceric sulphate titrant and ferroin end point indicator. DEHA reduces ferric iron to the ferrous state, and the resulting ferrous iron is titrated with the ceric sulphate titrant. Test results are expressed in ppm (mg/l) DEHA

Reference:
Developed by CHEMetrics, Inc.

Applications

Dissolved oxygen in boiler system water causes corrosion and pitting of metal surfaces, which can lead to boiler inefficiency, equipment failure, and system downtime. DEHA (N,N- Diethylhydroxylamine) is added to boiler system water as an oxygen scavenger to keep the dissolved oxygen levels as low as possible.


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