Palintest DPD No.1 Rapid Dissolve Tablets (250) - Type: 250 per pack
- Palintest DPD No.1 Tablets for testing chlorine levels with pool or hot tub water test kits.
- 250 tablets per pack.
- Best Before on current batch is beyond 2020 so 250 pack represents fantastic value for money without risk of tablets spo
- Free chlorine reacts with diethyl-p-phenylene diamine (DPD).
- The DPD Oxystop tablet is added after measurement for free chlorine but before the DPD 3 tablet
Sorry This Item is Out of Stock £19.69
Leave your email and we will message you once it's back in stock
Thank you. We will email you when the item is back in stock.
Palintest DPD No.1 Tablets for testing chlorine levels with pool or hot tub water test kits. 250 tablets per pack. Best Before on current batch is beyond 2020 so 250 pack represents fantastic value for money without risk of tablets spoiling.
This Palintest chlorine test uses the DPD method developed by Dr A T Palin and now internationally recognised as the standard method of testing for chlorine and other disinfectant residuals. In the Palintest DPD method, the reagents are provided in tablet form for maximum convenience and simplicity of use.
Free chlorine reacts with diethyl-p-phenylene diamine (DPD) in buffered solution to produce a pink coloration. The intensity of the colour is proportional to the free chlorine concentration.
Subsequent addition of excess potassium iodide induces a further reaction with any combined chlorine present. The colour intensity is now proportional to the total chlorine concentration; the increase in intensity represents the combined chlorine concentration. In this way, it is possible to differentiate between free and combined chlorine present in the sample. The colour intensities are measured using a Palintest Photometer.
The DPD Oxystop tablet is added after measurement for free chlorine but before the DPD 3 tablet. It prevents the reaction between shock treatment chemicals and potassium iodide which would give a positive response.
Other Products in Water Testing Tablets
Most Popular Products in Water Testing Tablets
Shop With Confidence
Eligible purchases are covered by the PayPal Buyer Protection scheme. If your order doesn't arrive, is faulty, damaged or vastly different to what was described, you can seek assistance from their expert dispute resolution team to claim a refund.