Nitric acid digestion and multi‐element analysis of plant material by inductively coupled plasma spectrometry

Abstract Micronutrients are widely used in feed products and are very important to the health and productivity of farm and domestic animals. It is imperative to have analytical capabilities for rapid and accurate results. By using a simple nitric acid digestion of the feed coupled with inductively coupled plasmamass spectrometry (ICP/MS), rapid and accurate results can be obtained. ICP/MS has many advantages over classical wet chemical methods, atomic absorption methods, and other ICP methods: speed of analysis, reduced standards preparation, reduced waste stream, and qualitative scan capabilities. One gram portions of feed products were placed into 250 mL volumetric flasks and digested with 30 mL concentrated high-purity nitric acid for about 20 min. They were then brought to volume with ultra-high-purity water, shaken, and filtered. Ten milliliter portions were taken, and 0.5 mL internal standards were added. Standards were made up in concentrations to agree with the expected range of the desired element. Analysis of check samples from the Association of American Feed Control Officials shows that this method is comparable with other methods of choice

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An Objective Function for Optimization Techniques in Simultaneous Multiple-Element Analysis by Inductively Coupled Plasma Spectrometry

Applied Spectroscopy ◽

10.1366/0003702824639079 ◽

1982 ◽

Vol 36 (1) ◽

pp. 37-40 ◽

Cited By ~ 37

Author(s):

J. J. Leary ◽

A. E. Brookes ◽

A. F. Dorrzapf ◽

D. W. Golightly

Keyword(s):

Objective Function ◽

Inductively Coupled Plasma ◽

Optimization Technique ◽

Optimization Techniques ◽

Operating Conditions ◽

Objective Functions ◽

Element Analysis ◽

Plasma Spectrometry ◽

Inductively Coupled ◽

Inductively Coupled Plasma Spectrometry

This work considers several composite objective functions and uses the sequential simplex optimization technique to evaluate the performance of a proposed objective function in locating optimal instrumental operating conditions for simultaneous multiple-element determinations by inductively coupled plasma spectrometry. The proposed objective function, combined with a generalized approach to optimization, can be applied to any group of analysis elements and is of value in routine optimization procedures for simultaneous multiple-element methods of analysis.

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The effect of acid digestion technique on the performance of nebulization systems used in inductively coupled plasma spectrometry

Communications in Soil Science and Plant Analysis ◽

10.1080/00103629609369636 ◽

1996 ◽

Vol 27 (5-8) ◽

pp. 1331-1354 ◽

Cited By ~ 94

Author(s):

Bernhard A. Zarcinas ◽

Michael J. McLaughlin ◽

Michelle K. Smart

Keyword(s):

Inductively Coupled Plasma ◽

Acid Digestion ◽

Plasma Spectrometry ◽

Inductively Coupled ◽

Inductively Coupled Plasma Spectrometry ◽

Digestion Technique

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Microwave-Assisted Vapor-Phase Nitric Acid Digestion of Small Biological Samples for Inductively Coupled Plasma Spectrometry

Applied Spectroscopy ◽

10.1366/0003702981944463 ◽

1998 ◽

Vol 52 (6) ◽

pp. 900-907 ◽

Cited By ~ 11

Author(s):

Dula Amarasiriwardena ◽

Antoaneta Krushevska ◽

Ramon M. Barnes

Keyword(s):

Nitric Acid ◽

Vapor Phase ◽

Biological Samples ◽

Inductively Coupled Plasma ◽

Closed Vessel ◽

Acid Digestion ◽

Inductively Coupled ◽

Microwave Assisted ◽

Microwave Apparatus ◽

Nitric Acid Digestion

The applicability of microwave-assisted, vapor-phase nitric acid digestion of small biological samples in closed-vessel microwave systems is examined for the inductively coupled plasma atomic emission spectroscopy (ICP-AES) determination of 10 elements (Al, As, Ca, Cu, Cd, Fe, Mn, Mo, Pb, and Zn). A 1.8 mL quartz sample container geometry was optimized for the successful decomposition of 50 to 90 mg of powdered biological samples. Microwave energy was efficiently coupled by addition of 250 μL of distilled deionized water to the sample. A single microwave-assisted, vapor-phase acid sample digestion was accomplished within 30 min (including cooling time) at ∼1200 psi pressure and 450 W microwave power in a commercial pressurized microwave decomposition (PMD) system. Multiple microwave-assisted, vapor-phase acid digestions were achieved at moderately high pressure (400 to 480 psi) and 230 °C with a second closed-vessel microwave apparatus. The results for 10 elements in biological standard reference materials agree well with the certified values.

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