| Investigations of Nebulizer Techniques for Direct Determination of Metals in Lubricating Oils by ICP |
01 FEB 1982 |
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| Authors:
J. D. Algeo; D. R. Heine; H. A. Phillips; M. B. Denton; ARIZONA UNIV TUCSON DEPT OF CHEMISTRY
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 | Equipment and procedures are described which allow the analysis of metals in lubricating oils w/o need for dilution or other sample pretreatment. A sample heater has been added to a modified Babington principle nebulizer. This nebulizer is capable of producing, from undiluted oils, aerosols suitable for introduction into an Inductively Coupled Plasma Atomic Emission Spectrophotometer. Heating the samples immediately prior to nebulization greatly increases the output of aerosol and reduces ... |
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| Determination of Nucleotides by Liquid Chromatograpy with a Phosphorus Sensitive Inductively Coupled Plasma Detector |
14 DEC 1981 |
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| Authors:
D. R. Heine; M. B. Denton; ARIZONA UNIV TUCSON DEPT OF CHEMISTRY
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| Quantitative analysis of 100 microliters nucleotide samples is accurately performed by analyzing total phosphorus concentration using an inductively coupled plasma (ICP) system. A single calibration using Na2HPO4 (aq) is useful for all nucleotides. A detection limit of 750 ng of phosphorus is determined with an RSD of 4.5%. High performance liquid chromatography (HPLC) is used to separate mixtures of nucleotides on an anion exchange column using acetate buffers. The ICP ... |
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| Qualitative Aspects of an Inductively Coupled Plasma in the Spectral Region between 120 and 185 nm. |
JAN 1980 |
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| Authors:
D. R. Heine; J. S. Babis; M. B. Denton; ARIZONA UNIV TUCSON DEPT OF CHEMISTRY
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| Investigations of the atomic emission lines produced by a variety of non-metals in the vacuum ultraviolet spectral region are reported. A number of promising analytical lines for oxygen, nitrogen, carbon, bromine, sulfur, and chlorine were observed between 120 and 185 nm using both photographic and electronic detection. A unique experimental configuration employing a side-arm torch which directly couples to the vacuum spectrometer/spectrograph is described. (Author) |
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| A High Power Inductively Coupled Plasma Torch and Impedance Matching Network. |
13 APR 1979 |
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| Authors:
D. L. Windsor; D. R. Heine; M. B. Denton; ARIZONA UNIV TUCSON DEPT OF CHEMISTRY
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| The relative ease of operation, power handling capabilities and overall performance of an inductively coupled- plasma-optical emission spectrometer (ICP-OES) depends upon numerous factors, not the least important of which is the design of the torch. A variety of such designs has appeared in the literature. Most workers have employed three concentric fused silica and/or pyrex tubes, referred to as an inner sample gas tube, a 'flaired mouth' plasma gas tube, ... |
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