Introduction of organic solvents into inductively coupled plasmas by ultrasonic nebulization with cryogenic desolvation

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · Analytical Chemistry (Washington); (USA)

DOI:https://doi.org/10.1021/ac00210a012· OSTI ID:6150382

Wiederin, D R; Houk, R S; Winge, R K; D'Silva, A P ^[1]

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1. Iowa State Univ., Ames (USA)

A two-step desolvation system for a continuous-flow ultrasonic nebulizer reduced the solvent load on an argon inductively coupled plasma (ICP). The aerosol was first heated above the boiling point of the solvent. Subsequently, solvent vapor was removed in two condensers kept at {minus}10{degree}C and {approx equal}{minus}80{degree}C. No special plasma ignition procedures were required; a change of solvent did not cause plasma instability. The plasma was stable to a forward power as low as 0.5 kW when methanol, acetone, acetonitrile, or ethanol was nebulized. The plasma could not be sustained while organic solvents were ultrasonically nebulized without at least partial desolvation. Detection limits for metals ranged from 0.2 {mu}g L{sup {minus}1} for Fe to 5 {mu}g L{sup {minus}1} for Pb. The detection limits for each element were approximately the same regardless of the organic solvent used and were comparable to those obtained during ultrasonic nebulization of aqueous solutions. With a forward power of 1.0 kW, molecular band emission from C{sub 2} was about 25 times less than when the aerosol was partially desolvated using a condensation temperature of {minus}10{degree}C.

• OSTI ID: 6150382
• Journal Information: Analytical Chemistry (Washington); (USA), Journal Name: Analytical Chemistry (Washington); (USA) Vol. 62:11; ISSN 0003-2700; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
AEROSOLS
AQUEOUS SOLUTIONS
COLLOIDS
DISPERSIONS
EMISSION SPECTROSCOPY
MEASURING INSTRUMENTS
MEASURING METHODS
MIXTURES
ORGANIC SOLVENTS
SAMPLE PREPARATION
SENSITIVITY
SOLS
SOLUTIONS
SOLVENTS
SPECTROSCOPY