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xii UK Focus - Water/Wastewater TOC Analyser Improves Lab Efficiency


Hach Lange (UK) is helping a number of key customers save valuable time and costs with its new IL550 TOC-TN analyser. TOC analysis is vitally important in applications ranging from power generation, wastewater, drinking water, surface water and ultrapure water, to agricultural soils, contaminated land and food. Hach Lange analysers therefore offer a range of options designed to meet every need. A typical analysis for total organic carbon (TOC) measures both the total carbon present as well as the inorganic carbon. This method has traditionally been the preferred analytical technique to measure water quality during the purification process.


COD (Chemical Oxygen Demand) is the total measurement of all chemicals in the water that can be oxidised. BOD (Biochemical Oxygen Demand) is a longer method designed to measure the amount of material (or organic carbons) that bacteria can oxidise. Although closely related to both BOD and COD analysis, TOC is important in its own right because it is the sole analytical method able to quantify only those species that contain carbon. For this reason TOC is a parameter that is required by regulations in many industries, for example, as a waste acceptance criterion of hazardous waste TOC analysis is now compulsory. It also provides a number of key benefits over BOD and COD including a significantly improved analysis speed and higher accuracy.


The IL550 can also be used for the determination of dissolved organic carbon (DOC) as well as total organic carbon (TOC) in sewage, river, landfill leachates, effluents and groundwater samples. Subsequently, it has proved to be an important addition for Hach Lange customers including the Environment Agency’s National Laboratory Services (NLS), South West Water and laboratory testing services company Chemtest. At the NLS, much of the analytical work is for regulatory purposes, so it is vitally important that fast, accurate, reliable results are produced. Richard Yates, Inorganic Analysis Team Leader at the NLS, said: “The high calibration range of the IL550 reduces the number of over-range repeat analyses we have to perform, thereby saving valuable lab time and improving the sampling process. In addition, the instrument is very easy to use and meets our required limit of detection.”


Tracy Churchill, Senior Assistant Scientist for South West Water, also praised the benefits of the IL500. She explained: “The IL 550 software is very user-friendly, making it easy to train analysts. Additionally, and most importantly, because the analyser has a ‘stand-by’ mode we are able


to leave the instrument on at a reduced temperature, which prolongs the life of the catalyst. As a result of these features we have significantly reduced downtime and maintenance costs, because previously we had to replace the catalyst on a fairly regular basis. We are delighted with the TOC-TN analyser and the results it is producing.”


The IL550 has also helped Chemtest save significant time and costs over the past year. Laboratory manager Darrell Hall said: “We have found the IL550 more reliable than the previous methods we used for TOC analysis on water and leachates samples and in general it has made the lab analysis process much more efficient.”


Reader Reply Card no 251 Oil Film Detection


Continuous on-line measurement for water intake protection & compliance applications requiring oil film detection


• trace oil level detection • non-contact laser measurement • reliable compact technology • low cost instrument • static or winched systems


Pollution & Process Monitoring Ltd. Tel: +44 (0) 1732 882044, Fax: +44 (0) 1732 780190


Email:TOC@pollution-ppm.co.uk, Web:www.pollution-ppm.co.uk Reader Reply Card no 252


New Logger for Water Level/ Pressure and Temperature


In-Situ Inc.(UK) announce the new Level TROLL 200 instrument with direct-read cable for monitoring and logging water level/pressure and temperature. The new absolute (non-vented) Level TROLL 200 instrument further expands In-Situ Inc.’s water level instrument offering. The Level TROLL 200 features corrosion resistance, flexible communications, low power consumption, and durable direct-read cable. For monitoring water levels and collecting hydrologic event data, the instrument offers linear, fast linear, and event logging modes. Chemical- and corrosion-resistant ABS construction makes the instrument suitable for saltwater and other harsh environments. Flexible Modbus, RS485, or SDI-12 output enable connection to TROLL®


Link telemetry systems, the RuggedReader® SCADA systems, or third-party data collection platforms.


“As the environmental monitoring industry seeks to reduce costs and maximise budgets, the new Level TROLL 200 instrument is designed for economical monitoring,” said Bob Blythe, CEO and President of In-Situ Inc. “With this addition to our Level TROLL line, we can cover our customers needs for any application, at any budget. For unattended field operation, the Level TROLL 200 offers low power consump- tion and durable construction, which extend deployments and significantly reduce mainten- ance and field visits.”


The TROLL® Com 200 is used to download


data from instruments deployed on direct-read cable. A docking station is used to download data from instruments deployed on suspension wire. To simplify data collection and manage- ment, the Level TROLL®


200 uses In-Situ® intuitive user interface, Win-Situ® Inc.’s 5 software.


Win-Situ 5 operates across the entire Level TROLL® platform and features setup wizards, fast data download rates, multiple water level reference options, and more.


The Level TROLL® 200 instrument is factory


calibrated over the full pressure and tempera- ture range (0° to 50° C) to ensure its specified accuracy. Many other loggers on the market are calibrated at only one or two points and meet stated accuracy only at those points. Each instrument includes a serialised calibration report.


To compensate for changes in water level due to barometric pressure fluctuations, the BaroTROLL®


100 instrument should be used. The BaroTROLL 100 measures and logs barome- tric pressure and temperature data and offers the same communication output options as the Level TROLL 200 instrument. Baro Merge™ soft- ware simplifies post-correction of data. The Level TROLL 200 instrument and TROLL Com 200 are now commercially available.


Reader Reply Card no 254 Reader Reply Card no 253 handheld PC, laptop,


IET


Annual Buyers Guide 2009


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