Use of the microwave-induced nitrogen discharge at atmospheric pressure as an ion source for elemental mass spectrometry

Journal Article · Wed Jul 01 04:00:00 EDT 1987 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00140a018· OSTI ID:6228294

Wilson, D A; Vickers, G H; Hieftje, G M

A microwave-induced nitrogen discharge at atmospheric pressure (MINDAP) is used as the ion source for elemental mass spectrometry (MS) and compared to the use of the inductively coupled plasma (ICP). Optimization studies are presented to illustrate the dependence of signals on various instrumental parameters. Detection limits determined for five elements range from 3 to 22 ng/mL, somewhat higher than those determined with an ICP and the same mass spectrometer system. The background mass spectrum from the MINDAP is dominated by NO/sup +/; oxide and hydroxide ion ratios are higher than for ICP-MS. The linear dynamic range is similar to that in ICP-MS, but interferences caused by concomitant elements are much worse in MINDAP-MS.

• Research Organization: Indiana Univ., Bloomington
• OSTI ID: 6228294
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 59:13; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
ALKALINE EARTH METALS
ATMOSPHERIC PRESSURE
BARIUM
CADMIUM
CALCIUM
CHEMICAL ANALYSIS
COBALT
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
MASS SPECTROSCOPY
METALS
MICROWAVE RADIATION
NITROGEN
NONMETALS
NUMERICAL DATA
OPTIMIZATION
PLASMA
QUANTITATIVE CHEMICAL ANALYSIS
RADIATIONS
SPECTROSCOPY
STRONTIUM
TRACE AMOUNTS
TRANSITION ELEMENTS