University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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NIST 1573

Classification: Reference Material -> NIST -> 1573 -> Tomato leaves

Citations 2

"Atomic Absorption Spectrometric Analysis Of Solids With Online Microwave-assisted Digestion"
J. Anal. At. Spectrom. 1992 Volume 7, Issue 7 Pages 1085-1089
V. Carbonell, A. Morales-Rubio, A. Salvador, M. de la Guardia, J. L. Burguera and M. Burguera

Abstract: A description is given of a procedure for online microwave-assisted digestion of solid samples prior to analysis by flame AAS as described previously (Anal. Chim. Acta, 1990, 238, 417). A slurry of the sample is transported in HNO3 - H2O2 (1:1) to extract Cu and Mn quantitatively in a few min. Digestion times vary from 4 min for sewage sludges to 2 min for matrices like artichoke. Detection wavelengths were 324.7 nm for Cu and 279.5 nm for Mn. A closed flow injection system allows digestion to be conducted online. Sample flow rate was 2.8 mL min-1. Over 15 samples h-1 can be analyzed using the procedure which allows for sequential treatment of different samples. A procedure was developed for the online microwave-assisted digestion of solid samples and their anal. by flame atomic absorption spectrometry. The method involves the transport of a slurry of the sample in a 1+1 mixture of concentrated HNO3 and H2O2, which provides quant. extraction of Cu and Mn in a few minutes. Real samples of sewage sludges dispersed in 20 mL of HNO3 and H2O2 can be digested in 4 min and other matrixes, such as artichoke and diet samples dispersed in 10 mL of HNO3 and H2O2 are digested in only 2 min. A closed flow injection system permits the online digestion to be carried out; the use of two interconnected injection valves allows the measurement of standards during the digestion of samples. The method permits the anal. of more than 15 samples per h and provides accurate results, as demonstrated by the anal. of certified samples of sewage sludges and tomato leaves.
Copper Manganese Sample preparation Spectrophotometry Microwave Online digestion Slurry Reference material

"Use Of Inductively Coupled Mass Spectrometry For Trace-metal Analysis In Natural Systems"
Lab. Pract. 1988 Volume 37, Issue 1 Pages 61-63
Eaton, A.N.;Hutton, R.C.

Abstract: Standard reference materials, e.g., human serum, tomato leaves, pine needles and hair, were analyzed with use of a VG PlasmaQuad ICP-MS instrument operated with recommended parameters (cf. Hutton and Eaton, J. Anal. Atomic Spectrom., 1987, 2, 595). The results (tabulated) show the method to be accurate; detection limits are typically at the pg mL-1 level. Use of the instrument in the rapid multi-element semi-quantitative screening mode as well as in the conventionally calibrated mode is described. A rapid data-acquisition system (Transcan) is available that permits elementary screening even for transient signals, e.g., from flow injection sample introduction.
Metals, trace Mass spectrometry Multielement Reference material