High extraction efficiency fiber coated with calix[4] open-chain crown ether for solid-phase microextraction of polar aromatic and aliphatic compounds

2005 ◽  
Vol 28 (17) ◽  
pp. 2306-2318 ◽  
Author(s):  
Mingming Liu ◽  
Zhaorui Zeng ◽  
Yun Lei ◽  
Haibing Li
Keyword(s):  
Crown Ether ◽  
Solid Phase Microextraction ◽  
Extraction Efficiency ◽  
Solid Phase ◽  
Open Chain ◽  
Aliphatic Compounds

scholarly journals Ionic Liquid-modified NiTi Composite Nanosheets Coating for Efficient Solid Phase Microextraction of Octadecylamine in Brine

2019 ◽  
pp. 1-8
Author(s):  
Huiju Wang
Keyword(s):  
Ionic Liquid ◽  
Solid Phase Microextraction ◽  
Extraction Efficiency ◽  
Solid Phase ◽  
Correlation Coefficients ◽  
Fiber Coating ◽  
Relative Standard ◽  
Optimized Conditions ◽  
As Solid Phase

Ionic     liquid (IL), 1-dodecyl-3-methylimidazolium-3-hydroxy-2-naphthoate (C12mimHNC) was synthesized and coated on the surface of NiTi as solid phase microextractiom fiber coating for determination the octadecylamine in brine. Prior to modification with IL, the NiTi was hydrothermally treated for in-situ growth of titanium and nickel oxide composite nanosheets (TiO2/NiOCNSs). The TiO2/NiOCNSs fibers coating was oriented  around the NiTi  substrate and  presented  double-faced  open  access  sites,  which provided a desired support framework for the further modification with IL. The extraction performance of C12mimHNC-TiO2/NiOCNSs fiber coating was evaluated for       detection of octadecylamine (ODA) coupled to HPLC with UV detection. As a result, the C12mimHNC-TiO2/NiOCNSs fiber coating illustrated excellent adsorption and extraction capability for ODA. The main factors affected extraction efficiency were optimized. Under the optimized  conditions,  good  linearity was  obtained  in  the  range of  1-150  µg/L with correlation  coefficients  (r2)  above  0.985.  Limits of detection (LODs) for  the  developed method was 0.280 µg/L. The proposed method was first applied to extract the ODA in brine samples. Relative recoveries varied from 78.3% to 96.5% at spiking level of 15µg/L and 30 µg/L with the relative standard deviations (RSDs) less than 8.7%.

scholarly journals The GC/MS Analysis of Volatile Components Extracted by Different Methods fromExocarpium Citri Grandis

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Zhisheng Xie ◽  
Qundi Liu ◽  
Zhikun Liang ◽  
Mingqian Zhao ◽  
Xiaoxue Yu ◽  
...  
Keyword(s):  
Solid Phase Microextraction ◽  
Large Scale ◽  
Steam Distillation ◽  
Extraction Efficiency ◽  
Solid Phase ◽  
Gas Chromatography Mass Spectrometry ◽  
Volatile Components ◽  
Germacrene D ◽  
Long Time ◽  
Sample Amount

Volatile components fromExocarpium Citri Grandis(ECG) were, respectively, extracted by three methods, that is, steam distillation (SD), headspace solid-phase microextraction (HS-SPME), and solvent extraction (SE). A total of 81 compounds were identified by gas chromatography-mass spectrometry including 77 (SD), 56 (HS-SPME), and 48 (SE) compounds, respectively. Despite of the extraction method, terpenes (39.98~57.81%) were the main volatile components of ECG, mainly germacrene-D, limonene, 2,6,8,10,14-hexadecapentaene, 2,6,11,15-tetramethyl-, (E,E,E)-, andtrans-caryophyllene. Comparison was made among the three methods in terms of extraction profile and property. SD relatively gave an entire profile of volatile in ECG by long-time extraction; SE enabled the analysis of low volatility and high molecular weight compounds but lost some volatiles components; HS-SPME generated satisfactory extraction efficiency and gave similar results to those of SD at analytical level when consuming less sample amount, shorter extraction time, and simpler procedure. Although SD and SE were treated as traditionally preparative extractive techniques for volatiles in both small batches and large scale, HS-SPME coupled with GC/MS could be useful and appropriative for the rapid extraction and qualitative analysis of volatile components from medicinal plants at analytical level.

scholarly journals Analysis of the Volatile Components of Pouteria sapota (Sapote Mamey) Fruit by HS-SPME-GC-MS

2018 ◽  
Vol 13 (8) ◽  
pp. 1934578X1801300 ◽  
Author(s):  
Candelario Rodríguez ◽  
Armando A. Durant-Archibold ◽  
Ana Santana ◽  
Enrique Murillo ◽  
Carlos M. Franco Abuín
Keyword(s):  
Aromatic Hydrocarbons ◽  
Solid Phase Microextraction ◽  
Extraction Efficiency ◽  
Solid Phase ◽  
Volatile Components ◽  
Spme Fiber ◽  
Volatile Organic ◽  
Doehlert Experimental Design ◽  
First Time ◽  
Fiber Coatings

The comparison of SPME fiber coatings, and optimization of temperature and time of extraction for headspace solid phase microextraction (HS-SPME) of volatile organic compounds (VOCs) present in Pouteria sapota (sapote mamey) fruits is presented. The PDMS/DVB coating afforded the highest extraction efficiency. The extraction conditions were optimized by using Doehlert experimental design. By using the optimized HS-SPME method, 21 VOCs were identified, which include mainly terpenoids and esters, followed by aromatic hydrocarbons, aldehydes, alcohols and ketones. The most abundant compounds in Pouteria sapota pulp were cedrol (25.0%), azulene (7.3%), β-ionone (5.7%) naphthalene (5.6%), α-pinene (5.0%), and benzaldehyde (4.3%). Seventeen VOCs were identified for the first time in the fruit.

scholarly journals Optimization of Headspace Solid-Phase Microextraction Conditions for the Identification of Phytophthora cinnamomi Rands

Plant Disease ◽  
2014 ◽  
Vol 98 (8) ◽  
pp. 1088-1098 ◽  
Author(s):  
Rui Qiu ◽  
Dong Qu ◽  
Giles E. St. J. Hardy ◽  
Robert Trengove ◽  
Manjree Agarwal ◽  
...  
Keyword(s):  
Solid Phase Microextraction ◽  
Extraction Efficiency ◽  
Phytophthora Cinnamomi ◽  
Solid Phase ◽  
Colony Development ◽  
Fiber Types ◽  
Headspace Solid Phase Microextraction ◽  
Morphological Studies ◽  
Relative Standard

A robust technique was developed to identify Phytophthora cinnamomi using headspace solid-phase microextraction (HS-SPME) combined with gas chromatography (GC) coupled to a flame ionization detector (FID) for analyzing volatile organic compounds (VOCs). Six fiber types were evaluated and results indicated that the three-phase fiber 50/30 μm divinylbenzene/carboxen/polydimethylsiloxane (DVB/CAR/PDMS) had the highest extraction efficiency for both polar and nonpolar GC columns. The maximum extraction efficiency (equilibrium absorption) was achieved 16 h after fiber exposure in the HS. Absorbed compounds on the fiber were completely desorbed in the GC injector after 5 min at 250°C. Compared with the nonpolar column, the polar column showed optimum separation of VOCs released from P. cinnamomi. Under the optimized HS-SPME and GC/FID conditions, lower detection limits for the four external standards was found to be between 1.57 to 27.36 ng/liter. Relative standard deviations <9.010% showed that the method is precise and reliable. The method also showed good linearity for the concentration range that was analyzed using four standards, with regression coefficients between 0.989 and 0.995, and the sensitivity of the method was 104 times greater than that of the conventional HS method. In this study, the VOC profiles of six Phytophthora spp. and one Pythium sp. were characterized by the optimized HS-SPME-GC method. The combination of the VOCs creates a unique pattern for each pathogen; the chromatograms of different isolates of P. cinnamomi were the same and the specific VOC pattern of P. cinnamomi remained consistently independent of the growth medium used. The chromatograms and morphological studies showed that P. cinnamomi released specific VOCs at different stages of colony development. Using the optimized HS-SPME GC method, identification of P. cinnamomi from 15 in vivo diseased soil samples was as high as 100%. Results from this study demonstrate the feasibility of this method for identifying P. cinnamomi and the potential use of this method for physiological studies on P. cinnamomi.

The Determination of Galaxolide in Water Samples with SPME Coupled with GC-MS

2011 ◽  
Vol 183-185 ◽  
pp. 184-187
Author(s):  
Bi Dong Su ◽  
Chen Zhen Min ◽  
Chen Dong Hui
Keyword(s):  
River Water ◽  
Solid Phase Microextraction ◽  
Extraction Efficiency ◽  
Solid Phase ◽  
Water Solution ◽  
Mass Spectrometric ◽  
Limit Of Quantification ◽  
Urban Sewage ◽  
Direct Sampling

Described is a solid-phase microextraction-gas chromatography mass spectrometric procedure for the determination of galaxolide (HHCB) in water solution samples. In which 100 μm PDMS coated fiber were used. From the optimization experiments of SPME, we found the direct sampling is necessary. The extraction time and temperature were 40min and 35°C, respectively. the salinity of the solution almost has no effect on the extraction efficiency and pH=7.0 was suitable for the extraction of HHCB. The method were applied to the urban sewage and river water respectively and found the content of HHCB in the urban sewage is 286ng/L, while those in river water below limit of quantification.

Electrochemical preparation of a poly(aniline-co-m-aminobenzoic acid)–ionic liquid composite coating for the head-space solid phase microextraction and analysis of aryl halides

2014 ◽  
Vol 6 (23) ◽  
pp. 9453-9458 ◽  
Author(s):  
Youhong Ai ◽  
Faqiong Zhao ◽  
Baizhao Zeng
Keyword(s):  
Ionic Liquid ◽  
Composite Coating ◽  
Solid Phase Microextraction ◽  
Extraction Efficiency ◽  
Solid Phase ◽  
Aryl Halides ◽  
Aminobenzoic Acid ◽  
Electrochemical Preparation ◽  
Mesh Structure ◽  
Poly Aniline

An electrodeposited poly(aniline-co-m-aminobenzoic acid)–ionic liquid composite coating presents a porous mesh structure, and shows high extraction efficiency for aryl halides.

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