Comparison of Digestion Methods Using Atomic Absorption Spectrometry for the Determination of Metal Levels in Plants

被引:16
|
作者
Bankaji, Insaf [1 ]
Kouki, Rim [1 ]
Dridi, Nesrine [1 ]
Ferreira, Renata [2 ,3 ]
Hidouri, Saida [4 ]
Duarte, Bernardo [5 ,6 ,7 ]
Sleimi, Noomene [1 ]
Cacador, Isabel [5 ,6 ,7 ]
机构
[1] Univ Carthage, Fac Sci Bizerte, RME Lab Resources Mat & Ecosyst, Bizerte 7021, Tunisia
[2] Polytech Inst Beja, Sch Agr, Dept Technol & Appl Sci, P-7800295 Beja, Portugal
[3] Univ Lisbon, CERENA, Inst Super Tecn, P-1049001 Lisbon, Portugal
[4] Univ Monastir, Fac Med Monastir, LR12SP13, Monastir 5000, Tunisia
[5] Univ Lisbon, MARE Marine & Environm Sci Ctr, Fac Ciencias, P-1749016 Lisbon, Portugal
[6] Univ Lisbon, Fac Ciencias, ARNET Aquat Res Network Assoc Lab, P-1749016 Lisbon, Portugal
[7] Univ Lisbon, Dept Biol Vegetal, Fac Ciencias, P-1749016 Lisbon, Portugal
关键词
trace metal elements; acid mineralization; environmental protection; spectroscopic analysis; SEASONAL-VARIATION; TRACE-ELEMENTS; AQUA-REGIA; SALT; RECOVERY; IRON; ZINC; ZN; CD; CU;
D O I
10.3390/separations10010040
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Trace metal elements (TMEs) are among the most important types of pollutants in the environment. Therefore, a precise determination of these contaminants in several environmental components is required for the safety assurance of living organisms. Spectroscopic analysis is an efficient technique employed to detect and determine TME contents in numerous samples. Hence, to achieve reliable and accurate results when using spectroscopic analysis, samples should be carefully prepared. In the present study, the comparison of eight digestion methods of five vegetal samples was carried out to quantify Cd, Mn, Al and Mg contents using the atomic absorption spectroscopy technique. According to the extraction techniques used in this study, results showed an outstanding difference in TME levels determined in the same vegetal sample. The results obtained indicated that the highest Mn concentrations were recorded when using the mixture of HNO3-HClO4 in the studied species: atriplex portulacoides, arthrocnemum indicum, olea europaea BCR-62, ulva lactuca and ulva lactuca BCR-279 compared to all other methods. Regarding the extraction of Cd, our results showed that heated extraction using different acids (HNO3-H2SO4-HClO4, HCl-HNO3, HNO3-HClO4, HNO3-H2SO4, HNO3-HCl-HClO4 and HNO3-HCl-H2SO4) was the most efficient in atriplex portulacoides, arthrocnemum indicum, olea europaea BCR-62, ulva lactuca and ulva lactuca BCR-279. Similarly, these heated acid digestion techniques (efficient for Cd) showed the highest levels of Al in atriplex portulacoides and arthrocnemum indicum. However, for the Mg extraction, our results revealed that the effectiveness of the method used depended on the plant species studied. Regarding these findings, the efficiency of metal quantification by AAS depends on the digestion procedure, the metallic ion to determine and the plant species.
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页数:11
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