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- [ PCB/Chloride Analyzer
Model L2000 ]
- [ Test Kit Water content
in Oil-Hydroscout ]

The Dexsil L2000 provides a fast, easy, accurate way of quantifying PCBs (polychlorinated biphenyls) in both soil and transformer oil. Designed to be used in the field, it provides a part per million readout on an LCD display and operates over the range of 2 to 2000 ppm.

The L2000 PCB/Chloride Analyzer is a portable instrument used to test for the presence of PCBs in soil, in transformer oil, and on surfaces. It uses a chloride specific electrode to quantify the concentration of PCBs in a sample after the sample has been reacted with a reagent that removes all of the chloride from the organic molecule. The instrument converts the chloride reading into ppm PCB and displays the result on the LCD readout. When the Aroclor type is known, the concentration of
PCBs can be accurately quantified by the L2000. If the Aroclor type is unknown, a general screening test can be run that will provide an upper limit for the amount of PCB that the sample contains. An inexperienced operator can learn to use the L2000 in a few minutes by simply reviewing the operator's manual. A test takes less than 10 minutes to run. All required reagents are in the reagent pack that is supplied with the instrument.

Industry Acceptance
The L2000 has been in the field since 1989. Hundreds of units are in use worldwide. The L2000 has received EPA approval and has been assigned SW-846 number 9078.

Uses and Limitations
The L2000 is sensitive to organic chloride from any source, not just PCBs, so if other chlorinated organic compounds are present, they will be detected as well. This also means that the L2000 may be used to test for DDT and other chlorinated pesticides and herbicides. Inorganic chlorides such as road salt will not be detected by this method. A ten gram soil sample is required to complete the test. A portable electronic balance is included with the instrument. The range of detection for the
instrument is from 2 ppm to 2000 ppm. It can be operated over a temperature range of 5°C to 45°C. The results achieved with the L2000 are unaffected by moisture up to 20%. Unlike other field tests for PCBs, petroleum hydrocarbons do not interfere with the test.

Using the L2000
The L2000 works by detecting all of the chlorinated organic chemicals in a given soil or transformer oil sample. In the case of a soil, the sample (10 g) is weighed out using the electronic balance included with the instrument. It is then extracted with a proprietary extraction solvent and a cleanup column to remove any inorganic chloride. This system extracts greater than 90% of the PCBs that may be present without interference from inorganic chlorides. This extract (or in the case of an oil sample, the oil it self) is then reacted with an alkali metal reagent which strips any chlorine atoms that are present off of the organic molecule. The resulting chloride ions are transferred from the organic extract solution to an aqueous based solution where the concentration of chloride ions can be measured accurately with a chloride ion specific electrode. The L2000 translates the reading from the electrode into parts per million PCBs and displays the reading on the LCD display.

Training
The L2000 has been designed to be used by those with little or no training in analytical chemistry. No calculations are required and reagent handling has been minimized by shipping the reagents in pre-measured, breakable glass ampules. Users should understand what a PCB is and should know the difference between Aroclor 1242 and Aroclor 1260. Users should also be trained in the safe handling of reagent chemicals.