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Pokhrel GR, Wang K, Ying K, Wu Y, Wang Z, Zhu X, Qu C, Li H, Fu F, Yang G. Effect of inorganic arsenic in paddy soil on the migration and transformation of selenium species in rice plants. J Environ Sci (China) 2024; 143:35-46. [PMID: 38644022 DOI: 10.1016/j.jes.2023.07.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 07/19/2023] [Accepted: 07/19/2023] [Indexed: 04/23/2024]
Abstract
Selenium (Se) in paddy rice is one of the significant sources of human Se nutrition. However, the effect of arsenic (As) pollution in soil on the translocation of Se species in rice plants is unclear. In this research, a pot experiment was designed to examine the effect of the addition of 50 mg As/kg soil as arsenite or arsenate on the migration of Se species from soil to indica Minghui 63 and Luyoumingzhan. The results showed that the antagonism between inorganic As and Se was closely related to the rice cultivar and Se oxidation state in soil. Relative to the standalone selenate treatment, arsenite significantly (p < 0.05) decreased the accumulation of selenocystine, selenomethionine and selenate in the roots, stems, sheaths, leaves, brans and kernels of both cultivars by 21.4%-100.0%, 40.0%-100.0%, 41.0%-100%, 5.4%-96.3%, 11.3%-100.0% and 26.2%-39.7% respectively, except for selenocystine in the kernels of indica Minghui 63 and selenomethionine in the leaves of indica Minghui 63 and the stems of indica Luyoumingzhan. Arsenate also decreased (p < 0.05) the accumulation of selenocystine, selenomethionine and selenate in the roots, stems, brans and kernels of both cultivars by 34.9%-100.0%, 30.2%-100.0%, 11.3%-100.0% and 5.6%-39.6% respectively, except for selenate in the stems of indica Minghui 63. However, relative to the standalone selenite treatment, arsenite and arsenate decreased (p < 0.05) the accumulation of selenocystine, selenomethionine and selenite only in the roots of indica Minghui 63 by 45.5%-100.0%. Our results suggested that arsenite and arsenate had better antagonism toward Se species in selenate-added soil than that in selenite-added soil; moreover, arsenite had a higher inhibiting effect on the accumulation of Se species than arsenate.
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Affiliation(s)
- Ganga Raj Pokhrel
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, Key Laboratory for Medicinal Plant Chemistry and Chemical Biology, College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Department of Chemistry, Birendra Multiple Campus, Tribhuvan University, Chitwan 00977-44200, Bharatpur, Nepal
| | - Kaiteng Wang
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, Key Laboratory for Medicinal Plant Chemistry and Chemical Biology, College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Kaiyang Ying
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, Key Laboratory for Medicinal Plant Chemistry and Chemical Biology, College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Yongchen Wu
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, Key Laboratory for Medicinal Plant Chemistry and Chemical Biology, College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Ze Wang
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, Key Laboratory for Medicinal Plant Chemistry and Chemical Biology, College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xi Zhu
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, Key Laboratory for Medicinal Plant Chemistry and Chemical Biology, College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Can Qu
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, Key Laboratory for Medicinal Plant Chemistry and Chemical Biology, College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Hong Li
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, Key Laboratory for Medicinal Plant Chemistry and Chemical Biology, College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Fengfu Fu
- Key Laboratory for Analytical Science of Food Safety and Biology of Ministry of Education, Fujian Provincial Key Lab of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou 350116, China.
| | - Guidi Yang
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, Key Laboratory for Medicinal Plant Chemistry and Chemical Biology, College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
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Li X, Shi L, Song P, Cai W, Luo X, Zhao B. Certification of New Selenium-Enriched Yeast and Supplement Reference Materials for Selenomethionine Using Two Independent Measurement Strategies. Molecules 2024; 29:235. [PMID: 38202818 PMCID: PMC10780638 DOI: 10.3390/molecules29010235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 12/26/2023] [Accepted: 12/30/2023] [Indexed: 01/12/2024] Open
Abstract
Selenium-enriched yeast possesses the unique ability of transforming chemical selenium, such as sodium selenite, into a biologically active form, which mitigates its toxic effects on the human body. The transformation product of this process, selenomethionine, can be safely and effectively absorbed and utilized by the human body; hence, it has been spiked into a selenium-enriched supplement. This study employs two distinct measurement strategies to determine the selenomethionine content in two candidate reference materials, a selenium-enriched yeast powder and supplement, using both organic and inorganic mass spectrometry. The concentrations of selenomethionine in the selenium-enriched yeast were determined using HPLC-ICP-MS and HPLC- ESI-MS/MS, with mass fractions measured at 718 mg SeMet kg-1 and 715 mg SeMet kg-1, respectively. Notably, both methods yielded consistent results for the selenium supplement, with a selenomethionine mass fraction of 59 mg SeMet kg-1. Ultimately, the certified values of these candidate reference materials were determined as 716 mg kg-1 and 59 mg SeMet kg-1 with expanded uncertainties of 36 mg SeMet kg-1 (k = 2) and 5 mg SeMet kg-1 (k = 2), respectively. The development of these candidate reference materials serves as a valuable reference for diverse methods aiming to determine the value of organic selenium speciation in complex food substrates.
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Affiliation(s)
- Xiao Li
- School of Ocean Sciences, China University of Geosciences (Beijing), Beijing 100083, China;
- Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing 100029, China; (L.S.); (P.S.); (W.C.)
| | - Ling Shi
- Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing 100029, China; (L.S.); (P.S.); (W.C.)
| | - Panshu Song
- Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing 100029, China; (L.S.); (P.S.); (W.C.)
| | - Wei Cai
- Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing 100029, China; (L.S.); (P.S.); (W.C.)
| | - Ximing Luo
- School of Ocean Sciences, China University of Geosciences (Beijing), Beijing 100083, China;
| | - Bo Zhao
- Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing 100029, China; (L.S.); (P.S.); (W.C.)
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Speciation of Selenium in Selenium-Enriched Foods by High-Performance Liquid Chromatography-Inductively Coupled Plasma-Tandem Mass Spectrometry. SEPARATIONS 2022. [DOI: 10.3390/separations9090242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Herein, a method was established for the speciation of six selenium species by high performance liquid chromatography-inductively coupled plasma-tandem mass spectrometry (HPLC-ICP-MS/MS). The factors affecting separation were carefully investigated, including ionic strength, pH, and methanol content. Six species of selenium could be completely separated within 20 min, under the mobile phase of 25 mM citric acid in pH = 4.0 containing 2% methanol. The detection limits of selenite (Se(IV)), selenate (Se(VI)), selenomethionine (SeMet), selenocystine (SeCys2), methylselenocysteine (MeSeCys), and selenoethionine (SeEt) were 0.04, 0.02, 0.05, 0.02, 0.03, and 0.15 ng mL−1, respectively. To verify the practicality of this method, the analysis of selenium-enriched foods such as selenium-enriched spring water, selenium-enriched salts, and selenium-enriched tea were conducted, and recovery of 93.7–105% was achieved with RSD < 5%, revealing the high practical utility of the proposed method.
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