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

GSC
Hal Gillette
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2001-09-20T22:41:00Z
2001-09-20T22:41:00Z
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1946
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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.