Multivariate response surface methodology assisted modified QuEChERS extraction method for the evaluation of organophosphate pesticides in fruits and vegetables cultivated in Nilgiris, South India

Publication date: Available online 16 July 2019Source: Food ChemistryAuthor(s): S.T. Narenderan, S.N. Meyyanathan, Veera Venkata Satyanarayana Reddy Karri, B. Babu, Pavankumar ChintamaneniAbstractAn effective, simple and sensitive analytical method has been developed employing liquid chromatography coupled with tandem mass spectrometry and validated for estimation of five organophosphate pesticides at trace levels in six fruits and twelve vegetables. Plackett-Burman design and central composite design was used to screen and optimize the significant factors in modified QuEChERS (quick, easy, cheap, effective, rugged and safe) extraction method. The method evaluation was done by matrix-matched calibration with linearity ranging from 5 to 500 µg/L with a correlation coefficient more than 0.990. The detection and quantification limit ranged from 0.1 to 1.0 µg/ kg and 0.5 to 5 µg/kg, respectively. The mean recoveries were in the range of 76.89 - 110.30 % with the relative standard deviation less than 13.26 % for all pesticides. Further, the method developed was applied to analyze real samples cultivated in the hill areas of Nilgiris, South India.
Source: Food Chemistry - Category: Food Science Source Type: research

Related Links:

This study showed the antileishmanial activity of compounds 1 and 2 isolated from N. oppositifolia. Furthermore, compound 2 demonstrated an antileishmanial activity towards amastigotes associated to an immunomodulatory effect.
Source: Journal of Venomous Animals and Toxins including Tropical Diseases - Category: Tropical Medicine Source Type: research
Conclusions: Proper sample preparation allowed the proteomic and de novo identification of different proteins in the D. melanostictus parotoid macrogland secretion. These results may increase the knowledge about the universe of molecules that compose amphibian skin secretion, as well as to understand their biological/physiological role in the granular gland.
Source: Journal of Venomous Animals and Toxins including Tropical Diseases - Category: Tropical Medicine Source Type: research
Source: Women and Birth - Category: Midwifery Source Type: research
Publication date: Available online 19 August 2019Source: Artificial Intelligence in MedicineAuthor(s): Anders Reenberg Andersen, Wim Vancroonenburg, Greet Vanden BergheAbstractProviding patients with the best possible care is the most essential function of any hospital. In an increasing number of countries, hospitals are governed by the number of patients they are able to attract and the corresponding services they provide for patients. One such service, which is often of significant importance for patients, is the option to choose their room type.Hospital decision makers would benefit from a strategic method for optimizin...
Source: Artificial Intelligence in Medicine - Category: Bioinformatics Source Type: research
In present work, we use an electromagnetic surface mode excited at the interface of a finite one-dimensional photonic crystal utilizing a ...
Source: Journal of the Optical Society of America B - Category: Physics Authors: Source Type: research
Sparse representation is commonly used in correction models to reduce thermal radiation effects. If the correction problem is restricted to ...
Source: Journal of the Optical Society of America A - Category: Physics Authors: Source Type: research
Titanium nitride (TiN) is a metal-like refractory material that can be used as a substitution for metals in many applications. In this ...
Source: Applied Optics - Category: Physics Authors: Source Type: research
This study found that liver transplant patients are at high risk of developing cardiovascular events post transplantation, even with no pre-existing risk factors. Can predictors be determined?Liver International
Source: Medscape Transplantation Headlines - Category: Transplant Surgery Tags: Transplantation Journal Article Source Type: news
Org. Biomol. Chem., 2019, Accepted Manuscript DOI: 10.1039/C9OB01686D, CommunicationShiva P Adhikari, Raymond Emehiser, Saswata Karmakar, Patrick J. Hrdlicka Double-stranded oligodeoxyribonucleotides with +1 interstrand zipper arrangements of 2'-O-(pyren-1-yl)methyl-RNA monomers are additionally activated for highly specific recognition of mixed-sequence DNA targets through incorporation of non-nucleotidic spermine bulges. The content of this RSS Feed (c) The Royal Society of Chemistry
Source: RSC - Organic and Biomolecular Chemistry - Category: Molecular Biology Authors: Source Type: research
Legislators, nonprofit groups and business leaders attended a blessing ceremony for the the new Joint Outreach Center medical clinic in Kaneohe on Friday. The following day, the center held an open house that allowed members of the community to learn more about how the clinic plans to respond to the health care needs of Windward Oahu's homeless population — the second highest number of unsheltered homeless on the Island, according to the Institute for Human Services. This three-year pilot program…
Source: bizjournals.com Health Care:Biotechnology headlines - Category: Biotechnology Authors: Source Type: news
More News: Chemistry | Food Science | Fruit | India Health | Vegetables