Application of an Online Chromium Reduction System for D/H Analysis of Water Samples with Large Isotopic Variations Using Conventional Mass Spectrometer

Year : 2025 | Volume : 15 | Issue : 01 | Page : 7 12
    By

    R. B. Ingole,

  • Ravi Chaudhary,

  • R. G. Ochani,

  • M Sadique,

  • S M Yusuf,

  1. Outstanding Scientist, Department of Electromagnetic Applications and Instrumentation Division, Physics Group, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
  2. Outstanding Scientist, Department of Electromagnetic Applications and Instrumentation Division, Physics Group, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
  3. Outstanding Scientist, Department of Electromagnetic Applications and Instrumentation Division, Physics Group, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
  4. Outstanding Scientist, Department of Electromagnetic Applications and Instrumentation Division, Physics Group, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
  5. Outstanding Scientist, Homi Bhabha National Institute, Anushaktinagar, Mumbai, Maharashtra, India

Abstract

We present an online chromium (Cr) reduction system for measuring the D/H ratio of water samples exhibiting significant isotopic contrast, where the memory effect cannot be overlooked. Memory compensation is incorporated into the analysis procedure to mitigate this effect, allowing the utilization of injection results that would otherwise be discarded due to the memory effect. This approach enables a faster analysis and an increased sample throughput.  Additionally, crucial aspects of the chromium reduction system aimed at maximizing the number of samples that can be analyzed per recharge of the chromium reactor, have been brought out. To achieve this, the furnace is configured for a uniform temperature profile, Cr powder is mixed with quartz glass granules, and the furnace is kept at continuous operation. This configuration has allowed us to achieve reproducibility better than ±0.15 ppm for two injections by incorporating memory compensation and drift correction in the analysis procedure. Moreover, the present computer-controlled sample inlet system is designed for a continuous operation (24/7) allowing us for a rapid sample analysis, with analysis time per injection is approximately 6-7 minutes.

Keywords: D/H analysis, Mass Spectrometry, Chromium reduction, Sample Inlet System, isotopic contrast

[This article belongs to Journal of Instrumentation Technology & Innovations ]

How to cite this article:
R. B. Ingole, Ravi Chaudhary, R. G. Ochani, M Sadique, S M Yusuf. Application of an Online Chromium Reduction System for D/H Analysis of Water Samples with Large Isotopic Variations Using Conventional Mass Spectrometer. Journal of Instrumentation Technology & Innovations. 2025; 15(01):7-12.
How to cite this URL:
R. B. Ingole, Ravi Chaudhary, R. G. Ochani, M Sadique, S M Yusuf. Application of an Online Chromium Reduction System for D/H Analysis of Water Samples with Large Isotopic Variations Using Conventional Mass Spectrometer. Journal of Instrumentation Technology & Innovations. 2025; 15(01):7-12. Available from: https://journals.stmjournals.com/joiti/article=2025/view=195513


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Regular Issue Subscription Original Research
Volume 15
Issue 01
Received 24/12/2024
Accepted 07/01/2025
Published 27/01/2025
Publication Time 34 Days
232

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