1
|
Wang J, Long J, Yang F, Yang X, Jiao W, Huang C. Open acid dissolution-Ammonia solution extraction-ICP OES rapid determination of 7 trace metal elements in soil. PLoS One 2023; 18:e0292168. [PMID: 37816018 PMCID: PMC10564144 DOI: 10.1371/journal.pone.0292168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Accepted: 09/14/2023] [Indexed: 10/12/2023] Open
Abstract
To overcome the corrosion of hydrofluoric acid on the ICP OES injection system in the acid dissolution system, this paper makes some improvements based on the traditional open digestion. The improved method does not require the complete removal of hydrofluoric acid. After appropriate digestion of the sample with a mixed acid, the solution can be transferred to a colorimetric tube containing ammonium hydroxide solution to give the final volume for analysis. In this paper, two-point standard curves are plotted using soil standards and process blanks, which is not only convenient but also overcomes the interference of the matrix effect. Through continuous experiments, the preferred ratio of mixed acid is 3 mL nitric acid + 5 mL hydrofluoric acid, and the concentration of ammonia solution is 0.5%. The spectral lines of the measured elements V (292.4), Cr (283.5), Co (228.6), Ni (231.6), Cu (324.7), Zn (213.8) and Pb (220.3) were determined. The method quantification limits of the seven measured elements V, Cr, Co, Ni, Cu, Zn and Pb were 0.909, 4.32, 0.269, 0.261, 0.968, 3.69 and 2.64 μg g-1, respectively, and the precision was 3.5%, 5.2%, 4.8%, 2.4%, 6.1% and 4.5%, respectively. After processing six national standard materials according to the experimental method, the measured values of each measured element were basically in agreement with the certified values, indicating that this method is fully feasible for the measurement of V, Cr, Co, Ni, Cu, Zn and Pb in soil. This method greatly improves the efficiency of pretreatment and is particularly suitable for analysing large batches of samples.
Collapse
Affiliation(s)
- Jiahan Wang
- Haikou Marine Geological Survey Center of China Geological Survey, Haikou, 571127, China
| | - Junqiao Long
- Haikou Marine Geological Survey Center of China Geological Survey, Haikou, 571127, China
| | - Feng Yang
- Haikou Marine Geological Survey Center of China Geological Survey, Haikou, 571127, China
| | - Xiujin Yang
- Haikou Marine Geological Survey Center of China Geological Survey, Haikou, 571127, China
| | - Wenguang Jiao
- Haikou Marine Geological Survey Center of China Geological Survey, Haikou, 571127, China
| | - Cheng Huang
- Haikou Marine Geological Survey Center of China Geological Survey, Haikou, 571127, China
| |
Collapse
|
2
|
Spanu A, Langasco I, Barracu F, Deroma MA, López-Sánchez JF, Mara A, Meloni P, Pilo MI, Estrugo ÀS, Spano N, Sanna G. Influence of irrigation methods on arsenic speciation in rice grain. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 321:115984. [PMID: 36001913 DOI: 10.1016/j.jenvman.2022.115984] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 07/31/2022] [Accepted: 08/07/2022] [Indexed: 06/15/2023]
Abstract
Although the bioaccumulation of arsenic (As) in rice grains is a global health issue, its speciation is not less worrying. Despite the ascertained effectiveness of the intermittent irrigation methods in minimizing the amount of total As in rice, knowledge of its influence on the As speciation has been insufficient so far. Hence, this contribution was aimed to measure the concentrations of As(III), As(V), dimethylarsinic acid (DMA), and monomethylarsonic acid (MMA) in grains from twenty-six different rice genotypes irrigated either with continuous flooding (CF), periodic saturation (SA) or sprinkler irrigation (SP). In CF-irrigated rice, As(III) and DMA prevailed in roughly equal amounts, only As(III) was found in SA-irrigated rice, whereas As(V) was largely predominant on As(III) in SP-irrigated rice. Organoarsenic species were below the limits of detection (LoD) in rice irrigated by intermittent methods. Principal component analysis (PCA) explained the influence of the irrigation method on the total amount of As, its chemical species, and their correlation. Furthermore, PCA showed also significant differences in As speciation as a function of the rice genotype, whereas no differences were found among Indica and Japonica subspecies.
Collapse
Affiliation(s)
- Antonino Spanu
- Dipartimento di Agraria, Università Degli Studi di Sassari, Viale Italia, 39A, I-07100 Sassari, Italy
| | - Ilaria Langasco
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università Degli Studi di Sassari, Via Vienna, 2, I-07100 Sassari, Italy
| | - Francesco Barracu
- Dipartimento di Agraria, Università Degli Studi di Sassari, Viale Italia, 39A, I-07100 Sassari, Italy
| | - Mario Antonello Deroma
- Dipartimento di Agraria, Università Degli Studi di Sassari, Viale Italia, 39A, I-07100 Sassari, Italy
| | - José Fermín López-Sánchez
- Secció de Química Analítica, Facultat de Química, Universitat de Barcelona, Martí I Franquès, 1, E-08028 Barcelona, Spain
| | - Andrea Mara
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università Degli Studi di Sassari, Via Vienna, 2, I-07100 Sassari, Italy
| | - Paola Meloni
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università Degli Studi di Sassari, Via Vienna, 2, I-07100 Sassari, Italy
| | - Maria Itria Pilo
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università Degli Studi di Sassari, Via Vienna, 2, I-07100 Sassari, Italy
| | - Àngels Sahuquillo Estrugo
- Secció de Química Analítica, Facultat de Química, Universitat de Barcelona, Martí I Franquès, 1, E-08028 Barcelona, Spain
| | - Nadia Spano
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università Degli Studi di Sassari, Via Vienna, 2, I-07100 Sassari, Italy
| | - Gavino Sanna
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università Degli Studi di Sassari, Via Vienna, 2, I-07100 Sassari, Italy.
| |
Collapse
|
3
|
Multi-Elemental Analysis as a Tool to Ascertain the Safety and the Origin of Beehive Products: Development, Validation, and Application of an ICP-MS Method on Four Unifloral Honeys Produced in Sardinia, Italy. Molecules 2022; 27:molecules27062009. [PMID: 35335374 PMCID: PMC8950479 DOI: 10.3390/molecules27062009] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/17/2022] [Accepted: 03/18/2022] [Indexed: 12/27/2022] Open
Abstract
Despite unifloral honeys from Sardinia, Italy, being appreciated worldwide for their peculiar organoleptic features, their elemental signature has only partly been investigated. Hence, the principal aim of this study was to measure the concentration of trace and toxic elements (i.e., Ag, As, Ba, Be, Bi, Cd, Co, Cr, Cu, Fe, Hg, Li, Mn, Mo, Ni, Pb, Sb, Sn, Sr, Te, Tl, V, and Zn) in four unifloral honeys produced in Sardinia. For this purpose, an original ICP-MS method was developed, fully validated, and applied on unifloral honeys from asphodel, eucalyptus, strawberry tree, and thistle. Particular attention was paid to the method’s development: factorial design was applied for the optimization of the acid microwave digestion, whereas the instrumental parameters were tuned to minimize the polyatomic interferences. Most of the analytes’ concentration ranged between the relevant LoDs and few mg kg−1, while toxic elements were present in negligible amounts. The elemental signatures of asphodel and thistle honeys were measured for the first time, whereas those of eucalyptus and strawberry tree honeys suggested a geographical differentiation if compared with the literature. Chemometric analysis allowed for the botanical discrimination of honeys through their elemental signature, whereas linear discriminant analysis provided an accuracy level of 87.1%.
Collapse
|