A COMMERCIAL SYSTEM FOR AUTOMATED NITROGEN ISOTOPE-RATIO ANALYSIS BY THE RITTENBERG TECHNIQUE

被引：83

作者：

MULVANEY, RL ^{[1
]}

FOHRINGER, CL ^{[1
]}

BOJAN, VJ ^{[1
]}

MICHLIK, MM ^{[1
]}

HERZOG, LF ^{[1
]}

机构：

[1] MEASUREMENT & ANAL SYST,BELLEFONTE,PA 16823

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1990年 / 61卷 / 02期

关键词：

D O I：

10.1063/1.1141460

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A sequential sample treatment system is described that permits use of an isotope-ratio mass spectrometer for automated Rittenberg analyses of ammonium salts. This system is based on the design of McInteer and Montoya [Recent Developments in Mass Spectrometry in Biochemistry, Medicine and Environmental Research, edited by A. Frigerio (Elsevier, Amsterdam, 1981), Vol. 7, p. 343]. An x-y table and a set of valves under computer control are used to automatically perform hypobromite oxidations, introduce the N2 thus liberated to the mass spectrometer for isotope-ratio analysis, and effect spent sample pumpaway. Analyses can be performed on samples containing 20 μg of N. When operated with a Nuclide Model 3-60-RMS double-collector mass spectrometer, the standard deviation for measurements at the natural abundance level (12 samples, 50 or 100 μg of N per sample) ranged from 0.0002 to 0.000 06 at. % 15N. Throughput capacity is 100-250 samples per day, and unattended operation can continue for at least three days.

引用

页码：897 / 903

页数：7

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[11] A MASS SPECTROMETER FOR ISOTOPE AND GAS ANALYSIS [J].