Please wait, while we are loading the content...
Please wait, while we are loading the content...
| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Hong, Shenqiu Yang, Jun Li, Panpan Tian, Zhenfeng Zhu, Xiaolan |
| Copyright Year | 2012 |
| Abstract | A new ultrasound-assisted extraction (UAE) followed by dispersive liquid–liquid microextraction (DLLME) method has been developed for the simultaneous determination of flavoring compounds, including safrole, coumarin, 6-methylcoumarin, 7-metheoxycoumarin, estragole, methyleugenol, pulegone and thujone, in tobacco additives. In this method, the targets were extracted from tobacco additive sample using ethanol by UAE. Then, 0.5 mL of the extract were used for the DLLME. In the DLLME, the target analytes in the extraction solvent were rapidly extracted into a small volume of chloroform and analyzed by chromatography-mass spectrometry (GC-MS). The parameters affecting the DLLME, including type and volume of extraction and disperser solvents, salt effect and extraction time, were investigated and optimized. Under the optimum conditions, the enrichment factors (EFs) ranged from 140 to 208. The linear relationship was obtained in the range of 0.4–928 ng mL−1, which showed satisfactory linearity with correlation coefficients (r2) over 0.9989 for all the analytes. The limits of detection (LOD) were between 0.04 and 0.24 ng mL−1 and the average recoveries were between 89.9 and 99.7% with relative standard deviations (RSDs) ranging from 2.5 to 6.7% in all cases. The method was successfully applied to the preconcentration and determination of these target compounds in tobacco additives. |
| Starting Page | 995 |
| Ending Page | 1000 |
| Page Count | 6 |
| File Format | HTM / HTML PDF |
| ISSN | 17599660 |
| Volume Number | 4 |
| Issue Number | 4 |
| Journal | Analytical Methods |
| DOI | 10.1039/c2ay05866a |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Gas chromatography\u2013mass spectrometry Ethanol Chloroform United Arab Emirates Coumarin Estragole Safrole Tobacco UAE Thujone Methyl eugenol Solvent Pulegone |
| Content Type | Text |
| Resource Type | Article |
| Subject | Analytical Chemistry Engineering Chemical Engineering |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|