Patent · US Active

Method for simultaneous determination of nitrogen and oxygen isotope compositions of natural nitrate and nitrite

US11561209B2 · kind B2 · utility

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13Claims

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Assignee

SHAANXI UNIVERSITY OF SCIENCE AND TECHNOLOGY · CN

Inventors

Youping Zhou · Tuji, CN
Bo Wang · Baofeng County, CN
Zhenyu Zhu · Lynnfield, US
Ran Ma · San Francisco, US
Yan Huang · 安丰镇, CN
Shuai Zheng · Berkeley, US
Ying Wang · Beijing, CN
Benli Zhang · Tuji, CN

Key dates

Filing date	Feb 7, 2020
Grant date	Jan 24, 2023
Priority date	—
Expiry date	Feb 27, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG01N2030/8868
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for simultaneous determination of nitrogen and oxygen isotope compositions of natural nitrate and nitrite, which quantitatively converts natural nitrate and nitrite into an organic ester and a nitro-compounds respectively, and then nitrate and nitrite δ18O and δ15N are simultaneously determined by adopting a gas chromatography/pyrolysis/gas chromatography/isotope ratio mass spectrometry coupling technology (GC/Py/GC/IRMS). According to the method for simultaneously determining the nitrogen and oxygen isotope compositions of the natural nitrate salt and nitrite salt, the small amount of sample does not result in the loss, acquisition, exchange and fractionation of nitrogen and oxygen.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.