REDUCTION OF INTERFERENCES IN THE DETERMINATION OF RARE EARTH ELEMENTS BY AN OCTOPOLE COLLISION/REACTION CELL INDUCTIVELY COUPLED PLASMA MASS SPECTROMETER–APPLICATION TO THE ANALYSIS OF CHIOS MASTIC GUM (original) (raw)
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Rapid Communications in Mass Spectrometry, 2009
In recent years identification of the geographical origin of food has grown more important as consumers have become interested in knowing the provenance of the food that they purchase and eat. Certification schemes and labels have thus been developed to protect consumers and genuine producers from the improper use of popular brand names or renowned geographical origins. As the tomato is one of the major components of what is considered to be the healthy Mediterranean diet, it is important to be able to determine the geographical origin of tomatoes and tomato-based products such as tomato sauce. The aim of this work is to develop an analytical method to determine rare earth elements (RRE) for the control of the geographic origin of tomatoes. The content of REE in tomato plant samples collected from an agricultural area in Piacenza, Italy, was determined, using four different digestion procedures with and without HF. Microwave dissolution with HNO3 + H2O2 proved to be the most suitable digestion procedure. Inductively coupled plasma quadrupole mass spectrometry (ICPQMS) and inductively coupled plasma sector field plasma mass spectrometry (ICPSFMS) instruments, both coupled with a desolvation system, were used to determine the REE in tomato plants in two different laboratories. A matched calibration curve method was used for the quantification of the analytes. The detection limits (MDLs) of the method ranged from 0.03 ng g−1 for Ho, Tm, and Lu to 2 ng g−1 for La and Ce. The precision, in terms of relative standard deviation on six replicates, was good, with values ranging, on average, from 6.0% for LREE (light rare earth elements) to 16.5% for HREE (heavy rare earth elements). These detection limits allowed the determination of the very low concentrations of REE present in tomato berries. For the concentrations of REE in tomato plants, the following trend was observed: roots > leaves > stems > berries. Copyright © 2009 John Wiley & Sons, Ltd.
Jan. Detection and Quantification of Mineral and Heavy Metals
It is a poisonous and toxic plant but they are sources of many bioactive compounds i.e. aryl naphthalene, alkaloids and some terpenoids. The plant is made in different region of Maharashtra, India and across the world. It contaminates the water in affected area for digestion metabolism. Along with that they may also contain some substances as pesticides, heavy metals and which have harmful effect on the body. In this work, Cleistanthus collinus were studied to determine Pb , Cd , As, Mn , Cu , Co , Ni contents in them .This was analyzed using Inductively coupled plasma Spectroscopy (ICP-OES). The results were compared with the safety standards of world Health Organization (WHO). The average concentrations of heavy metals detected are ranged higher than the permissible limits. Pb (18.20 ppm) is not ranges from 3.3ppm-4.59 ppm, Cd (0.60 ppm) is not ranged from 0.04pm-0.4 ppm. Concentration of As (2.00ppm) was not ranges from 0.7ppm-1.5 ppm, Ni (27.40 ppm) was not found to range between 2.82 ppm-5.76 ppm , in clasthnthus collinus and most of them were well higher than maximum permissible limits (MPL).
Analytical Methods, 2018
There are several international regulations regarding trace elements. The use of ICP-MS for their determination is usually a difficult task, especially when Hg is one of the target elements.