Chlorine (Free & Total), Vacu-vials Instrumental Kit, CHEMetrics

The Vacu-vials® instrumental test kits employ the DPD chemistry and are accepted by the USEPA for wastewater and drinking water analysis.

• Analysis Time: 1 minute

Chlorine is a halogen and strong oxidizing agent that is used by many industries as a disinfectant in water. Total chlorine is the sum of free chlorine (hypochlorite ion and hypochlorous acid) and chloramines (also known as combined chlorine) which are formed by the reaction of free chlorine with ammonia. Free chlorine is routinely added to water as a disinfectant (chlorination). Disinfection with monochloramine (chloramination) is an alternative or a supplement to chlorination to maintain long-lived residuals in water distribution pipelines. Chlorine was one of the first chemicals ever used in water treatment and has been in use since the 19th century to treat drinking water. Today, it is also used to treat municipal wastewater, swimming pools and spas.

While both free and combined chlorine act as disinfectants, free chlorine has stronger disinfecting properties. It is therefore advantageous to distinguish between free and combined chlorine in treated waters. In addition, due to the formation of harmful disinfectant byproducts (DPB) it is imperative to closely monitor the residual concentration of chlorine. The Maximum Residual Disinfectant Level for chlorine in drinking water is 4 mg/L. Total water chlorination tests can also be used to determine the total residual oxidizer (TRO) concentration of seawater.

Ordering information: 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. Instrument sold separately.

Delivery information: The free and total Chlorine testing kit (K-2513) comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules, Activator Solution, 25 ml sample cup, ampoule blank, and instructions.