Coupled Argon Plasma Emission Spectroscopy Research Articles

Simultaneous Determination of Total Boron, Calcium, Copper, Iron, Magnesium/Manganese, Phosphorus, Potassium, and Zinc in Fertilizers by Inductively Coupled Argon Plasma Emission Spectroscopy

Abstract Nine elements (B, Ca, Cu, Fe, Mg, Mn, P, K, and Zn) were determined in 34 Magruder fertilizer standards by inductively coupled argon plasma (ICAP) emission spectroscopy. The total elemental concentrations found for each of the 9 elements compared favorably with known concentrations. Seventeen of the fertilizer samples were also extracted with ammonium citrate, and the phosphorus in the extract was determined by ICAP emission spectroscopy with good results compared with the known Magruder concentration for available phosphate. Concentrations of other elements (Al, Ba, Cd, Co, Cr, Na, Ni, Pb, Si, and Sr) were also obtained but were not verified.

Sample digestion procedures for simultaneous determination of arsenic, antimony, and selenium by inductively coupled argon plasma emission spectrometry with hydride generation

Sample digestion procedures for simultaneous determination of arsenic, antimony, and selenium by inductively coupled argon plasma emission spectrometry with hydride generation

Critical evaluation of a multi-element scheme using plasma emission and hydride evolution atomic-absorption spectrometry for the analysis of plant and animal tissues

An analytical scheme that uses inductively coupled argon plasma emission spectroscopy (ICAP) and hydride evolution atomic-absorption spectrometry (HEAA) for the determination of trace elements in plant and animal tissues has been evaluated. The scheme incorporates the ion-exchange procedure of Kingston et al., which uses Chelex 100 resin to concentrate trace elements and remove potentially interfering alkali and alkaline earth metals. The separation procedure is included in a scheme designed to maximise the number of analyte metals that can be determined from a single digestion of a biological matrix. Acid-digested samples are divided into two fractions. One fraction (5% of the total) is measured directly by ICAP for alkali and alkaline earth metals and phosphorus and for transition metals such as iron and manganese, which are not well behaved on the resin. The other fraction (95% of the total) is subjected to the separation procedure whereby a number of biologically important trace elements, including cadmium, copper, molybdenum, nickel, vanadium and zinc, are initially sequestered by the resin, and then stripped into a small volume of dilute nitric acid for ICAP measurement of the “matrix-free” analytes. Arsenic, selenium and antimony, which are not retained by the resin, are collected with the initial column effluent, acidified and determined by HEAA. The reliability of the scheme is influenced by the nature of the acid digestion procedure used to oxidise the organic matrix. The scheme was tested by analysis of ten National Bureau of Standards biological reference materials.

A critical examination of the analytical significance of extended linear working ranges in inductively coupled argon plasma emission spectrometry

If least squares analytical curves for Inductively Coupled Argon Plasma-Atomic Emission Spectrometry (ICAP-AES) that cover the entire linear working range are plotted under the assumption of equal weights for all of the calibration standards, severe errors can occur. A systematic study of the relationship between concentration and the standard deviation of the resulting net line intensity revealed that the concentration range that can be calibrated by one and the same analytical curve is limited under three orders of magnitude. From the results of analytical curves based on large numbers of measurements, it appeared that a linear scale is required for the lower concentration range, and a logarithmic scale for the upper range. The analytical implications of these transformations of scale are discussed on the basis of the width of confidence intervals along the analytical curves.

Analysis of Laboratory Animal Feed for Toxic and Essential Elements by Atomic Absorption and Inductively Coupled Argon Plasma Emission Spectrometry

Analytical procedures are described for the determination of arsenic, cadmium, calcium, copper, lead, mercury, selenium, and zinc in animal feed. Mercury is determined by digesting the feed sample in a mixture of concentrated nitric and sulfuric acids with vanadium pentoxide added as an oxidation catalyst, reducing with stannous chloride, and sweeping the elemental mercury into an absorption tube for measurement by atomic absorption (AA) spectrophotometry. Arsenic and selenium are determined simultaneously by digesting the sample with a mixture of concentrated nitric, sulfuric, and perchloric acids; the hydrides of arsenic and selenium, which are formed with the addition of sodium borohydride, are swept into an argon-hydrogen flame for analysis by AA. A low temperature ash is prepared and dissolved in IN HNO3 for the analysis of calcium, copper, and zinc by emission spectroscopy using the inductively coupled argon plasma source; the same solution is used for the determination of cadmium and lead by flameless AA. Animal feed spiked with 3 levels of each of the 8 elements gave recoveries that ranged from 80 to 107%.

Determination of arsenic and selenium in water, fish, and sediments by inductively coupled argon plasma emission spectrometry.

Determination of arsenic and selenium in water, fish, and sediments by inductively coupled argon plasma emission spectrometry.

Sample introduction system for simultaneous determination of volatile elemental hydrides and other elements in food by inductively coupled argon plasma emission spectrometry.

Sample introduction system for simultaneous determination of volatile elemental hydrides and other elements in food by inductively coupled argon plasma emission spectrometry.

Elemental content of predigested liquid protein products

Eight commercially available partially digested gelatin liquid products that have been used as a source of protein in dietary regimens for weight reduction and for protein supplementation were analyzed for their elemental composition. These products were prepared either by dry ashing or wet digestion techniques that were suitable for the analysis of individual elements by their respective analytical methods. Analytical methods used to assess the elemental content included inductively coupled argon plasma emission spectrometry for Ca, Mg, P, Fe, Zn, Cu, Mn, Ni, Mo, V, Be, Co, Cr, Tl, Al, Te, Sn and Sb; atomic absorption spectrophotometry for Na and K; hybride generation with atomic absorption spectrophotometry for Se and As; anodic stripping voltammetry for Cd and Pb; and ion selective electrode for F. The content of almost all of the elements in these products was extremely low compared with the amounts supplied daily for normal individuals by usual sources of dietary protein, the adult United States Recommended Daily Allowances, and typical intakes from the Total Diet Study. The following elements were not detectable in significant amounts in these products by inductively coupled argon plasma emission spectrometry: Mo, V, Be, Co, Cr, Tl, Al, Te, Sn, and Sb. The results suggest that use of these predigested liquid protein products as a sole source of nutriment will result in an inadequate intake of all of the essential elements. These products contained insignificant amounts of Ce and Pb, nonessential toxic elements.