Comparison of normal and low-flow torches for inductively coupled plasma mass spectrometry using optimized operating conditions

1991 ◽  
Vol 6 (6) ◽  
pp. 421 ◽  
Author(s):  
E. Hywel Evans ◽  
Les Ebdon
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Operating Conditions ◽  
Low Flow ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry

Use of a water-cooled low-flow torch in inductively coupled plasma mass spectrometry

1988 ◽  
Vol 60 (4) ◽  
pp. 372-375 ◽  
Author(s):  
J. S. Gordon ◽  
P. S. C. Van der Plas ◽  
Leo. De Galan
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Low Flow ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry

Characterization of a 23-mm Torch for Use in Inductively Coupled Plasma Mass Spectrometry

1992 ◽  
Vol 46 (3) ◽  
pp. 448-457 ◽  
Author(s):  
L. A. Norman ◽  
M. Muñoz ◽  
D. P. Myers ◽  
B. S. Ross ◽  
G. M. Hieftje
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Detection Limits ◽  
Low Flow ◽  
High Mass ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry ◽  
Low Mass ◽  
Doubly Charged ◽  
Oxide Ion

A 23-mm-i.d. torch is described and evaluated for use in inductively coupled plasma mass spectrometry. The plasma operates optimally at 1.50 kW forward power and 19.2 L/min total argon flow. The effect of the customary operating parameters (nebulizer flow rate, rf power, sampling depth, and ion-lens voltages) on analyte signals is discussed. Detection limits, oxide-ion ratios, and doubly charged ion ratios have been measured and are compared with those produced by an 18-mm-i.d. low-flow MAK torch. When compared to the conventional torch, the 23-mm system exhibits comparable detection limits for low-mass ions but better detection limits for high-mass ions (Pb and U). Oxide-ion ratios are lower in the larger torch, but doubly charged ion ratios are higher. Because optimal sampling depths in the larger torch are higher, entrained air in the tail flame causes instability and results in increased ArO+ and ArN+ background signals.

A Study of Internal Standardization in Inductively Coupled Plasma-Mass Spectrometry

1987 ◽  
Vol 41 (5) ◽  
pp. 801-806 ◽  
Author(s):  
Joseph J. Thompson ◽  
R. S. Houk
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Internal Standard ◽  
Operating Conditions ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Ionization Suppression ◽  
Plasma Mass Spectrometry ◽  
Internal Standardization ◽  
Very High

Internal standardization is employed to compensate for ionization suppression in inductively coupled plasma-mass spectrometry (ICP-MS). By examination of the response of over 50 elements to a sodium matrix under different operating conditions, it is apparent that an internal standard is most effective when it is close in mass and ionization energy to the analyte. The extent of suppression and the relative order of suppression of various analyte elements can differ for various matrix elements. Generally, precision was improved by the use of internal standardization; the extent of improvement differed for different analyte elements and operating conditions. A comparison between ICP-MS with ultrasonic and pneumatic nebulization is described. The ultrasonic nebulizer usually exhibits better sensitivity and detection limits for analyte elements, unless the extent of suppression induced by the concomitant matrix is very high.

Reduction of Mass-Dependent Interferences in Inductively Coupled Plasma-Mass Spectrometry by using Flow-Injection Analysis

1989 ◽  
Vol 43 (8) ◽  
pp. 1330-1333 ◽  
Author(s):  
George H. Vickers ◽  
Barbara S. Ross ◽  
Gary M. Hieftje
Keyword(s):  
Mass Spectrometry ◽  
Flow Injection ◽  
Flow Injection Analysis ◽  
Inductively Coupled Plasma ◽  
Flow Analysis ◽  
Operating Conditions ◽  
Inductively Coupled ◽  
Signal Suppression ◽  
Plasma Mass Spectrometry ◽  
Mass Dependent

The use of flow-injection analysis to reduce mass-dependent interferences in inductively coupled plasma-mass spectrometry has been assessed. Results are presented which demonstrate nearly complete elimination of analyte-signal suppression under operating conditions where dispersion ( D) is approximately 25. Furthermore, results obtained with flow-injection analysis exhibit greater precision, take less time, and suffer only a 40% reduction in sensitivity, compared to continuous-flow analysis.

Exploration of robust operating conditions in inductively coupled plasma mass spectrometry

2003 ◽  
Vol 58 (11) ◽  
pp. 1927-1944 ◽  
Author(s):  
John W Tromp ◽  
Mario Pomares ◽  
Manuel Alvarez-Prieto ◽  
Amanda Cole ◽  
Hai Ying ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Operating Conditions ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry
Sign in / Sign up

Export Citation Format

Share Document