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    Deployment and evaluation of an NH<sub>4</sub><sup>+</sup>∕&thinsp;H<sub>3</sub>O<sup>+</sup> reagent ion switching chemical ionization mass spectrometer for the detection of reduced and oxygenated gas-phase organic compounds by C. L. Zang, M. D. Willis

    Published 2025-01-01
    “…We find that <span class="inline-formula">H<sub>3</sub>O<sup>+</sup></span> optimally detects reduced ROC species with high volatility, while <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M21" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><msubsup><mi mathvariant="normal">NH</mi><mn mathvariant="normal">4</mn><mo>+</mo></msubsup></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="24pt" height="15pt" class="svg-formula" dspmath="mathimg" md5hash="fc7f721ac75f3b099ec2891c91941f4b"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="amt-18-17-2025-ie00009.svg" width="24pt" height="15pt" src="amt-18-17-2025-ie00009.png"/></svg:svg></span></span> improves detection of functionalized ROC compounds, including organic nitrates and oxygenated SVOCs and IVOCs that are readily fragmented by <span class="inline-formula">H<sub>3</sub>O<sup>+</sup></span>.…”
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