Determination of Antimony Speciation in Cow Milk Using Dispersive Micro-solid Phase Extraction Based on Fibrous TiO2@g-C3N4 Nanocomposites and ICP-MS After Sample Pretreatment by Artificial Gastric Juice

2020 ◽  
Vol 13 (11) ◽  
pp. 2102-2110
Author(s):  
Shizhong Chen ◽  
Yuxiu Liu ◽  
Chunlei Wang ◽  
Juntao Yan ◽  
Dengbo Lu
Keyword(s):  
Solid Phase Extraction ◽  
Gastric Juice ◽  
Solid Phase ◽  
Sample Pretreatment ◽  
Cow Milk ◽  
Phase Extraction ◽  
Icp Ms ◽  
Artificial Gastric Juice ◽  
Antimony Speciation

Fibrous g-C3N4@Tio2 Nanocomposites-Based Dispersive Micro-Solid Phase Extraction for Chromium Speciation in Cow Milk by ICP-MS after Digestion Treatment with Artificial Gastric Juice

2020 ◽  
Author(s):  
Shizhong Chen ◽  
Yuxiu Liu ◽  
Juntao Yan ◽  
Chunlei Wang ◽  
Dengbo Lu
Keyword(s):  
Solid Phase Extraction ◽  
Gastric Juice ◽  
Solid Phase ◽  
Selective Adsorption ◽  
Cow Milk ◽  
Phase Extraction ◽  
Digestion Solution ◽  
Icp Ms ◽  
Relative Standard ◽  
Artificial Gastric Juice

Abstract Background Chromium is an interesting element because its toxicity depends on its speciation. Thus, knowledge of Cr speciation in cow milk is essential to human health. Objective This study aims to achieve real bioaccessible species in cow milk, including Cr(III), Cr(VI), residual, digestible, and total Cr. Methods Samples were treated with artificial gastric juice, followed by dispersive micro-solid phase extraction (DMSPE) combined with ICP-MS for Cr speciation. Fibrous g-C3N4@TiO2 nanocomposites (FGCTNCs) were used as a novel adsorbent for DMSPE. Results The method detection limits were 110 pg/g (Cr(III)) and 260 pg/g (Cr(VI)) for milk powder (0.1 g), and 5.1 pg/g (Cr(III)) and 13 pg/g (Cr(VI)) for liquid cow milk (2 mL). The relative standard deviations (RSDs), obtained by analyzing the standard solutions containing 1.0 ng/mL of the analytes in sequence for nine times, were 4.3% and 5.1% for Cr(III) and Cr(VI), respectively. Linearity was observed over the range of 4 magnitude orders with correlation coefficients better than 0.9961. The enrichment factor of 100 was obtained. The majority of Cr in the samples was transferred into digestion solution. The content of Cr(III) is much higher than that of Cr(VI) in the digestion solution. Conclusions This method has the advantages of reduced solvent consumption, less adsorbent dosage, and high extraction efficiency. It may become a valuable strategy for elemental species in food samples. Highlights The samples were treated with artificial gastric juice to avoid the inter-conversion of species. FGCTNCs exhibit the merits of N-rich functional groups and selective adsorption for the analytes.

scholarly journals Determination of Trace Elements in High Purity Iron by Solid Phase Extraction Using Bonded Silica/ICP-MS

2003 ◽  
Vol 89 (9) ◽  
pp. 958-961 ◽  
Author(s):  
Shin-ichi HASEGAWA ◽  
Kunikazu IDE ◽  
Takeshi KOBAYASHI ◽  
Koichi SATO ◽  
Shukuro IGARASHI ◽  
...  
Keyword(s):  
Trace Elements ◽  
Solid Phase Extraction ◽  
High Purity ◽  
Solid Phase ◽  
Phase Extraction ◽  
Icp Ms ◽  
Purity Iron ◽  
High Purity Iron

scholarly journals Determination of Available Phenolic Compounds in Soils by Liquid Chromatography with Solid-Phase Extraction

2002 ◽  
Vol 85 (6) ◽  
pp. 1210-1216
Author(s):  
David Matějíček ◽  
Bořivoj Klejdus ◽  
Vlastimil Kubáň
Keyword(s):  
Phenolic Compounds ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Sample Pretreatment ◽  
Dry Weight ◽  
Soil Samples ◽  
Phase Extraction ◽  
Cinnamic Acids ◽  
Water Ph

Abstract A fast, selective, and sensitive liquid chromatographic (LC) method was developed for determination of derivatives of benzoic and cinnamic acids (gallic, protocatechuic, 2,3,4–trihydroxybenzoic, 4-hydroxybenzoic, vanillic, caffeic, syringic, 4-coumaric, ferulic, sinapic, benzoic, 2-coumaric, cinnamic acids, and 4-hydroxybenzaldehyde and vanillin) in soil samples. The method for sample pretreatment is based on temperature-controlled extraction with water (pH 5.6) for 60 min. Extracts were preconcentrated and purified by solid-phase extraction on OASIS HLB sorbent, with subsequent separation and quantification of individual substances by LC with UV diode-array detection. Limits of detection (3 signal-to-noise LODs) better than 65 ng/g (dry weight) and recoveries from 88 to 99% were found for each compound at absorbance 280 nm. The method was used for determination of bioavailable phenolic compounds in different soil samples.

Amine functionalized polyacrylonitrile fibers for the selective preconcentration of trace metals prior to their on-line determination by ICP-MS

2021 ◽  
Author(s):  
Xiaoyu Jia ◽  
Junyi Zhao ◽  
Jiani Wang ◽  
Hongyun Ren ◽  
Zixiao Hong ◽  
...  
Keyword(s):  
Trace Metals ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Phase Extraction ◽  
The Core ◽  
Amine Functionalized ◽  
Selective Preconcentration ◽  
Icp Ms ◽  
On Line

Amine functionalized polyacrylonitrile fibers (PANFs) were designed and utilized as the core adsorbent for solid phase extraction (SPE). The on line SPE-ICP-MS method was established for the separation and determination of V(v), As(iii), Sn(iv), Sb(iii) and Bi(ii).

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