High-tech: Samplers

Sept. 20, 2001

About the author: For further information, phone Hach Company at 800-227-4224.

New Analyzer Offers Continuous Measurement, Dual Stream Sample A new analyzer from Hach is designed to perform continuous on-line analysis of Total Organic Carbon (TOC) in drinking water tre

A new analyzer from Hach is designed to perform continuous on-line analysis of Total Organic Carbon (TOC) in drinking water treatment plants. The dual-stream analyzer uses a reliable UV-persulfate analysis technique and is designed to meet the Disinfectants and Disinfection By-Products Final Rule (DBPR). The analyzer acquires a removal percentage measurement by continuously alternating between inlet and outlet water sampling points.

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With the introduction of the Disinfectants and Disinfection By-Product Rule (D/DBPR) by the United States Environmental Protection Agency, the measuring of Total Organic Carbon concentrations throughout a drinking water plant has become very important. The D/DBP rule requires those in the industry to report the TOC removal percentage based on the TOC and Alkalinity concentration of the source water compared to the TOC concentration of the distribution water.

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Continuous on-line measurement of TOC removal percentage provides two key benefits. The first benefit is an immediate knowledge of your compliance status. The second benefit is continuous knowledge of removal percentage information, which allows you to actively control the employed removal technology (e.g. enhanced coagulation).

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According to the company, the 1950plus On-line TOC Analyzer offers the following benefits:

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  • Intelligent software reports pass/fail status for TOC removal

percentage;

  • Complies with Standard Methods 5310 C and EPA Method 415.1;
  • Dual stream sample system for source and distribution water;
  • Grab sample analysis capability for immediate manual TOC measurements;
  • Flexible analysis system with CO2 NDIR detection and onboard sample dilution allows high salts and hard-to-oxidize sample analysis;
  • Loss of sample and loss of UV reactor flow are standard integrated analyzer diagnostics features;
  • Tolerant to changes in sample composition, pH, and temperature;
  • Drift and interference free NDIR detector with PVDF (KYNAR) flow-through cell;
  • Modular construction simplifies maintenance and service;
  • Optional self-cleaning blowback filter removes particles from sample lines;
  • Optional air purifier upgrades compressed air supply and improves analyzer efficiency.
About the Author

Hach Company

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