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IWA-35EP - Isotopic Water Analyzer (Liquid+Vapor)

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IWA-35EP - Isotopic Water Analyzer (Liquid+Vapor)

LGR’s Isotopic Water Analyzer (model IWA-35EP) is the world’s most advanced instrument for measurements of both isotopic liquid water and isotopic water vapor. The IWA-35EP combines the features of LGR’s Liquid Water Isotope Analyzer and Water Vapor Isotope Analyzer (Enhanced Performance model) in a single instrument. For liquid water samples, the IWA-35EP reports measurements at a rate of 1080 injections per day.  With the typical operating procedure (6 injections per sample), this measurement rate yields 150 unknowns and 30 reference samples per day. For continuous measurements of water vapor, the IWA-35EP reports δ18O and δ2H and water vapor mole fraction over a range of mole fractions greater than 60000 ppm H2O in air.   Changing between operational modes could not be simpler  - with only a software command, the user can switch from measuring liquid water to measuring water vapor, or vice versa.


The IWA-35EP is part of LGR’s new “Enhanced Performance' series which incorporates proprietary internal thermal control for ultra-stable measurements with negligible drift, unsurpassed precision and highest accuracy.

The Analyzer uses LGR’s patented Off-axis ICOS technology, a fourth-generation cavity ringdown spectroscopy (CRDS) technique, which employs an optical cavity to greatly enhance spectral absorption and enable the fastest and highest precision measurements of any laser absorption technique. LGR’s patented technology has many proven advantages over conventional first-generation CRDS techniques. As a result, LGR analyzers are simple to build, inherently robust and easy to operate. As with all LGR analyzers, the IWA-35EP provides users with measured high resolution absorption spectra for comprehensive performance validation and diagnostics in real time.  Similarly, the instrument has an internal computer (Linux OS) that can store data practically indefinitely on an internal hard disk drive and send real time data to a data logger via the digital (RS232) or Ethernet outputs. In addition, the Analyzer includes advanced Post-Analysis Software which provides many features that increase user productivity, decrease data processing time, and provide data and system diagnostics.

LGR’s acclaimed Post Analysis Software automatically performs many analysis procedures on liquid measurements that were previously done by researchers after the data was collected. Among the capabilities of LGR’s software are to automatically apply calibration standard measurements made during the sample run, to graphically display all results, and to diagnose instrument operation. Moreover, the Post Analysis Software includes LGR’s proprietary Spectral Contamination Identifier (SCI) technology, which detects and quantifies the presence of organic contaminants in water samples based on a detailed analysis of the measured high-resolution absorption spectra that only LGR's systems provide.

Finally, all LGR analyzers may be controlled remotely via the Internet. This capability allows users to operate the Analyzer using a web browser anywhere internet access is available. Furthermore, remote access provides the opportunity to obtain and share data and to diagnose the instrument operation without being on site.


Features

Features


  • Highest precision: liquid water AND water vapor
  • Liquid water: 1080 injections (150 unknowns) per day
  • High Throughput and High Performance Modes with same Autoinjector
  • Switch (via software) between liquid and vapor measurements in seconds
  • Fastest response: liquid water and water vapor
  • Isotopic water vapor reported at high and low mole fractions
  • Enhanced Performance: unsurpassed stability and lowest drift
  • No cross-sensitivity to atmospheric species

Specification

Specification


Performance

Concentration Range
Water Vapor
1000 - 60000 ppm (non-condensing)

Maximum Drift
Water Vapor:
(15-minute average at STP over 24 hrs)
δ18O: 0.2 per mil
δ2H: 0.8 per mil
H2O: 0.1%

Liquid Water:no drift (< measurement precision)

Precision (1σ, 10 seconds/100 seconds)
Water Vapor:
δ18O: 0.5‰ / 0.15‰
δ2H: 2.0‰ / 0.7‰
[H2O]: 0.2% / 0.07%

Repeatability (High-Precision Mode)
Liquid Water Guaranteed:
0.1‰ for 18O/16O
0.3‰ for D/H

Liquid Water Typical:
0.07‰ for 18O/16O
0.2‰ for D/H

Repeatability (High-Throughput Mode)
Liquid Water Guaranteed:
0.2‰ for 18O/16O
0.6‰ for D/H

Liquid Water Typical:
0.1‰ for 18O/16O
0.3‰ for D/H

Throughput
Liquid Water
1080 injections/day (180 samples, >150 unknowns)

Size & Weight
Dimensions
11' H x 38' W x 22' D

Operating Requirements

Operating Temperature
5-45 °C

Power Requirements
180 W (steady state);
115/230 VAC; 50/60 Hz

Sample Temperature
5 - 50 °C (liquid)
-20 - 50 °C (vapor)

Configuration

Data Storage
Internal Hard Drive

Outputs
Digital (RS232), Ethernet, USB

Salinity
>40 parts per thousand (40 PSU)


Los Gatos Research
Los Gatos Research
67 East Evelyn Avenue, Suite 3
Mountain View ,  California 94041-1529
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