Nitrogen in stone meteorites and terrestrial standards.

Murty, S. V. S.; Shukla, P. N.; Goel, P. S.

doi:10.2343/geochemj.17.165

Cited by 7 publications

(3 citation statements)

References 61 publications

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“…However, the large range for BCR‐1/2 from 15 to 62 μg g −1 possibly results from the heterogeneous distribution of N in BCR‐1/2 (Murty et al . ), or the inevitable disadvantage inherent in the NAA technique including contamination by atmospheric N 2 (Norris and Schaeffer ) or interfering reactions during neutron irradiation (Shukla et al . ).…”

Section: Resultsmentioning

confidence: 99%

“…The nitrogen mass fractions of BCR-2 and BHVO-2 have been determined by neutron activation analysis (NAA) as 34 ± 12 lg g -1 and 22.6 ± 3 lg g -1 , respectively. However, the large range for BCR-1/2 from 15 to 62 lg g -1 possibly results from the heterogeneous distribution of N in BCR-1/2 (Murty et al 1983), or the inevitable disadvantage inherent in the NAA technique including contamination by atmospheric N 2 (Norris and Schaeffer 1982) or interfering reactions during neutron irradiation (Shukla et al 1978).…”

Section: Nitrogen Mass Fractions and Isotopic Compositions Of Bcr-2 Amentioning

confidence: 99%

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Nitrogen Mass Fraction and Isotope Determinations in Geological Reference Materials Using Sealed‐Tube Combustion Coupled with Continuous‐Flow Isotope‐Ratio Mass Spectrometry

Liu

2018

Geostandard Geoanalytic Res

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A method using a high‐temperature sealed‐tube combustion technique coupled with a continuous‐flow isotope‐ratio mass spectrometer (CF‐IRMS) was developed in this study to accurately determine the nitrogen mass fractions and δ15N of silicate rocks with a low nitrogen mass fraction of < 200 μg g−1. Analysis of reference material (HBa3) demonstrated that the nitrogen mass fraction and δ15N results using the developed method were in agreement with data obtained using classical sealed‐tube combustion coupled to a dual‐inlet MS. Given the lack of commercially accessible reference materials usable for interlaboratory comparisons, two igneous reference materials (BCR‐2 and BHVO‐2) obtained from the United States Geological Survey (USGS) were analysed for nitrogen mass fractions and δ15N using the new method. Due to their homogenous characteristics, they can potentially be used as test materials for inter‐laboratory comparisons. The sealed‐tube combustion technique yielded higher N mass fractions than the elemental analyser, suggesting that previous nitrogen mass fractions measured using EA‐IRMS were underestimated. Thus, the nitrogen mass fractions and δ15N of BCR‐2 and BHVO‐2 may not have been correctly determined using EA‐IRMS.

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Section: Resultsmentioning

confidence: 99%

Section: Nitrogen Mass Fractions and Isotopic Compositions Of Bcr-2 Amentioning

confidence: 99%

Nitrogen Mass Fraction and Isotope Determinations in Geological Reference Materials Using Sealed‐Tube Combustion Coupled with Continuous‐Flow Isotope‐Ratio Mass Spectrometry

Liu

2018

Geostandard Geoanalytic Res

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“…The analytical techniques traditionally employed to determine these elements in geological materials are combustion methods, gravimetric methods and the Kjeldahl method. More recently, analytical techniques such as neutron activation analysis (Shukla et al 1978, Murty et al 1983, infrared absorption spectrometry (Terashima 1979(Terashima , 1988 and automatic elemental analyser (Din and Jones 1978, McGeehan and Naylor 1988, David et al 1989, Artiola 1990, Terashima 1993, Matejovic 1997, Kowalenko 2001) have been used. Coulometric titration (Atkin and Somerfield 1994), flame photometry (Marcó et al 2001), inductively coupled plasma-atomic emission spectrometry (ICP-AES, Okai et al 2001), high-resolution inductively coupled plasma-mass spectrometry (HP-ICP-MS, Makishima and Nakamura 2001), and elemental analyser-continuous flow isotope ratio mass spectrometry (EA-CFIRMS, Studley et al 2002) were reported as methods covering only S determination.…”

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confidence: 99%

Simultaneous Determination of Total Carbon, Nitrogen, Hydrogen and Sulfur in Twenty‐seven Geological Reference Materials by Elemental Analyser

Kubota

2009

Geostandard Geoanalytic Res

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The contents of total carbon, hydrogen, nitrogen and sulfur in twenty‐seven geological reference materials, issued by five producer organisations (USGS, CCRMP, ANRT, NIST and GSJ) were determined using an automated simultaneous elemental analyser following combustion. In order to complete gasification of C and N in some geological materials, the combustion temperature needed to be greater than 1150 °C. The calibrator prepared from known amounts of reagent material was not adopted for more than 1.2% m/m of H. Unrealistically high values in certain materials supposed to contain less than 1000 μg g−1 S may be due mainly to memory effects. The limit of detection was 50 μg g−1 for C and N, 500 μg g−1 for H and 1000 μg g−1 for S. Although the blank value of C and N was always stable and less than one third of the detection limit, it had a slightly higher value for N and S. By repeating long‐term analysis, high reproducibility for each of the four elements was verified. The method has been applied satisfactorily to a variety of geological reference materials, and recommended values for C, H and N for most of the reference materials studied have been tabulated.

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