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Altunay N, Gürkan R, Kır U. Spectrophotometric determination of low levels arsenic species in beverages after ion-pairing vortex-assisted cloud-point extraction with acridine red. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2015; 33:259-70. [PMID: 26605790 DOI: 10.1080/19440049.2015.1118561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
A new, low-cost, micellar-sensitive and selective spectrophotometric method was developed for the determination of inorganic arsenic (As) species in beverage samples. Vortex-assisted cloud-point extraction (VA-CPE) was used for the efficient pre-concentration of As(V) in the selected samples. The method is based on selective and sensitive ion-pairing of As(V) with acridine red (ARH(+)) in the presence of pyrogallol and sequential extraction into the micellar phase of Triton X-45 at pH 6.0. Under the optimised conditions, the calibration curve was highly linear in the range of 0.8-280 µg l(-1) for As(V). The limits of detection and quantification of the method were 0.25 and 0.83 µg l(-1), respectively. The method was successfully applied to the determination of trace As in the pre-treated and digested samples under microwave and ultrasonic power. As(V) and total As levels in the samples were spectrophotometrically determined after pre-concentration with VA-CPE at 494 nm before and after oxidation with acidic KMnO4. The As(III) levels were calculated from the difference between As(V) and total As levels. The accuracy of the method was demonstrated by analysis of two certified reference materials (CRMs) where the measured values for As were statistically within the 95% confidence limit for the certified values.
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Affiliation(s)
- Nail Altunay
- a Faculty of Science, Department of Chemistry , University of Cumhuriyet , Sivas , Turkey
| | - Ramazan Gürkan
- a Faculty of Science, Department of Chemistry , University of Cumhuriyet , Sivas , Turkey
| | - Ufuk Kır
- a Faculty of Science, Department of Chemistry , University of Cumhuriyet , Sivas , Turkey
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Hao K, Li Y, Feng J, Zhang W, Zhang Y, Ma N, Zeng Q, Pang H, Wang C, Xiao L, He X. Ozone promotes regeneration by regulating the inflammatory response in zebrafish. Int Immunopharmacol 2015; 28:369-75. [PMID: 26033494 DOI: 10.1016/j.intimp.2015.05.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Revised: 05/03/2015] [Accepted: 05/18/2015] [Indexed: 12/22/2022]
Abstract
Ozone is thought to advance wound healing by inhibiting inflammation, but the mechanism of this phenomenon has not been determined. Although the zebrafish is often used in regeneration experiments, there has been no report of zebrafish treated with ozonated water. We successfully established a zebrafish model of ozonated water treatment and demonstrate that ozonated water stimulates the regeneration of the zebrafish caudal fin, its mechanism, and time dependence. The growth rate of the caudal fin and the number of neutrophils migrating to the caudal fin wound after resection were higher in the experimental (ozonated) group than in the control group, preliminarily confirming that ozone-promoted regeneration is related to the stimulation of an early inflammatory response by ozone. Ozone modulated the expression of tumor necrosis factor-α (TNF-α) in two ways by regulating interleukin 10 (IL-10) expression. Therefore, ozone promotes tissue regeneration by regulating the inflammatory pathways. This effect of ozone in an experimental zebrafish model is demonstrated for the first time, confirming its promotion of wound healing and the mechanism of its effect in tissue regeneration. These results will open up new directions for ozone and regeneration research.
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Affiliation(s)
- Kenan Hao
- Interventional Diagnosis and Treatment Department, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong Province, China
| | - Yanhao Li
- Interventional Diagnosis and Treatment Department, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong Province, China
| | - Jianyu Feng
- Interventional Diagnosis and Treatment Department, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong Province, China
| | - Wenqing Zhang
- Key Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases Institute, Southern Medical University, Guangzhou 510515, Guangdong Province, China
| | - Yiyue Zhang
- Key Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases Institute, Southern Medical University, Guangzhou 510515, Guangdong Province, China
| | - Ning Ma
- Key Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases Institute, Southern Medical University, Guangzhou 510515, Guangdong Province, China
| | - Qingle Zeng
- Interventional Diagnosis and Treatment Department, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong Province, China
| | - Huajin Pang
- Interventional Diagnosis and Treatment Department, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong Province, China
| | - Chunyan Wang
- Interventional Diagnosis and Treatment Department, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong Province, China
| | - Lijun Xiao
- Interventional Diagnosis and Treatment Department, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong Province, China
| | - Xiaofeng He
- Interventional Diagnosis and Treatment Department, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong Province, China
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Gao Y, Liu X, Qi W, Gao W, Li Y, Xu G. Highly efficient quenching of tris(2,2′-bipyridyl)ruthenium(ii) electrochemiluminescence by ozone using formaldehyde, methylglyoxal, and glyoxalate as co-reactants and its application to ozone sensing. Analyst 2015; 140:3996-4000. [DOI: 10.1039/c5an00292c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Ozone can dramatically quench tris(2,2′-bipyridyl)ruthenium(ii) ECL of formaldehyde, methylglyoxal, and glyoxalate, enabling highly sensitive ozone detection.
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Affiliation(s)
- Ying Gao
- School of Chemistry and Environmental Engineering
- Changchun University of Science and Technology
- Changchun 130022
- China
| | - Xiaoyun Liu
- School of Chemistry and Environmental Engineering
- Changchun University of Science and Technology
- Changchun 130022
- China
- State Key Laboratory of Electroanalytical Chemistry
| | - Wenjing Qi
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Wenyue Gao
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Yunhui Li
- School of Chemistry and Environmental Engineering
- Changchun University of Science and Technology
- Changchun 130022
- China
| | - Guobao Xu
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
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