Monitoring of organophosphorous pesticide resdues in samples of banana, papaya, and bell pepper

 

Quim. Nova 2015, 38(2), 268-273

 

Mariana F. Lemos; Mayara F. Lemos; Henrique P. Pacheco; Rodrigo Scherer^*

The objective of this paper was to monitor organophosphorus residues in samples of banana, papaya, and bell pepper from ten different markets in Vitória and Vila Velha cities (Espírito Santo, Brazil) during a three-month period.

http://dx.doi.org/10.5935/0100-4042.20150005

Publicado online: janeiro 16, 2015

Quim. Nova, Vol. 38, No. 2, 268-273, 2015

Nota Técnica http://dx.doi.org/10.5935/0100-4042.20150005

*e-mail: rodrigo.scherer@uvv.br

MONITORING OF ORGANOPHOSPHOROUS PESTICIDE RESDUES IN SAMPLES OF BANANA, PAPAYA, AND BELL PEPPER

Mariana F. Lemos, Mayara F. Lemos, Henrique P. Pacheco and Rodrigo Scherer* Departamento de Farmácia, Universidade Vila Velha, Rua Comissário José Dantas de Melo, 21, 29102-770 Vitória – ES, Brasil

Recebido em 11/07/2014; aceito em 16/10/2014; publicado na web em 16/01/2015

The objective of this study was to monitor 11 organophosphorus pesticides in samples of papaya, bell pepper, and banana, commercialized in the metropolitan area of Vitória (ES, Brazil). The pesticides were determined by an optimized and validated method using high performance liquid chromatography with tandem mass spectrometry (HPLC-MS/MS). All three samples exhibited a matrix effect for most of the pesticides, mainly with signal suppression, and therefore the calibration curves were produced in matrices. Linearity revealed coefficients of determination (r²) greater than 0.9895 for all pesticides and recovery results ranged from between 76% and 118% with standard deviation no greater than 16%. Precision showed relative standard deviation values lower than 19% and HorRat values lower than 0.7, considering all pesticides. Limits of quantification were less than 0.01 mg/kg for all pesticides. Regarding analysis of the samples (50 of each), none of the pesticides exceeded the maximum residue limit determined by Brazilian legislation.

Keywords: QuEChERS; Capsicum annuum; Musa spp.; Carica papaya; pesticide analysis.

Departamento de Farmácia, Universidade Vila Velha, Rua Comissário José Dantas de Melo

A green condom? Indian researcher gets $100,000 grant for his idea

A green condom? Indian researcher gets $100,000 grant for his idea

Read more at:

http://indiatoday.intoday.in/story/green-condom-indian-researcher-gets-dollar-100000-grant-for-his-idea/1/365636.html

 

http://indiatoday.intoday.in/story/green-condom-indian-researcher-gets-dollar-100000-grant-for-his-idea/1/365636.html

Top 10 Reasons Se/\… Is Good for You

From making you smarter to reducing cancer risk, boning does more than make you feel good.

January 19, 2014  |

 When news broke this week that sex actually makes us smarter, the collective Internet did a cartoon double-take. Sex is supposed to make us  lose our minds, not  grow them. Lust turns us into beasts, not rocket scientists, right?

read at

http://www.alternet.org/sex-amp-relationships/top-10-reasons-sex-good-you