Riaz Uddin

Pakistan Agricultural Research Council | PARC · Food Quality and Safety Research Institute

In this study, Polyethylene glycol (PEG400) stabilized silver nanoparticles (PEG-AgNPs) were used as a colorimetric nanosensor to detect diazinon selectively. Highly stable PEG-AgNPs were synthesized through the one-pot two-phase procedure. The characterization of nano-sensor was performed via UV–vis spectroscopy, scanning electron microscopy (SEM)...

A reliable, easy, and reproducible method was developed for the quantification of λ-cyhalothrin and malathion residues in desert locust. For the extraction, a mixture of acetone and methanol (1 : 1) was used, and clean-up was performed by solid-phase extraction. Method efficacy was checked by fortification results at 0.01, 0.05, 0.10, and 0.5 mg/kg...

A reliable, easy, and reproducible method was developed for the quantification of λ-cyhalothrin and malathion residues in desert locust. For the extraction, a mixture of acetone and methanol (1 : 1) was used, and clean-up was performed by solid-phase extraction. Method efficacy was checked by fortification results at 0.01, 0.05, 0.10, and 0.5 mg/kg...

A precise, accurate, simple and low cost reverse phase high performance liquid chromatographic (RP-HPLC) method was developed and validated for the simultaneous quality assessment of commonly used insecticide carbofuran and fipronil in its technical and formulated products. The chromatographic parameters, i.e. mobile phase composition, wavelength a...

Abstract: Present study was conducted to investigate the levels and persistence of imidacloprid residues in wheat grains and straw of field crop samples grown from treated seed and foliar application. Objective of the study was to assess the best practices that may be used to produce safe grains and straw. Residual uptake of imidacloprid was measur...

Present study was conducted to investigate the levels and persistence of imidacloprid residues in wheat grains and straw of field crop samples grown from treated seed and foliar application. Objective of the study was to assess the best practices that may be used to produce safe grains and straw. Residual uptake of imidacloprid was measured after s...

A pot experiment was conducted in order to know the phosphorus requirement of wheat as affected by different levels of phosphorus (P) for obtaining 95% relative yield grown in four soil series i.e. Gishkori, Buzdar, Sultanpur and Tikken of Dera Ismail Khan Khyber Pakhtunkhwa, Pakistan. The various treatment levels were consisted of 0, 5.5, 11.0, 16...

The experiment to investigate the impact of Zn and B on yield of some rice cultivars was carried out during 2013 to 2015 at the experimental field of Shaheed Benazir Bhutto Rice Research Institute (previously RRI) Dokri, Larkana. Five rice varieties (IR6, IR8, DR92, DR83 and Shahkar) were selected for the purpose. B at 5 Kgha-1 as Boric Acid (H 3 B...

A simple, cheap, easy and efficient multi-residue analytical method is reported for simultaneous determination of sixteen different multiple pesticide residues including organochlorines, organophosphates, synthetic pyrethroids and herbicides in rice grains and for the analysis of thirteen insecticide residues in wheat grains. Extraction was carried...

A study was undertaken in order to find out the effect of incubation periods of phosphorus applied in soil samples of four series i.e. Gishkori, Buzdar, Sultanpur and Tikken with varying clay contents of 52, 48, 21 and 20% collected from Dera Ismail Khan, Khyber Pakhtunkhuwa, Pakistan. Soil samples were equilibrated in 20 ml aliquot of 0.01M CaCl2...

Imidacloprid is mainly used as seed treatment before sowing. Despite its moderate toxic effect, its excessive use may lead to adverse effects on health. The present study was conducted to evaluate the persistence of imidacloprid in wheat grains at 28±2°C and 18±1°C and also the time required for degradation of imidacloprid residues in wheat grains...

Imbalance use of three major essential nutrients such as nitrogen, phosphorus and potassium along with other production factors is the main cause of low yield of radish in Pakistan. To inquire the fact, a field experiment was conducted to find out the effect of nitrogen along with constant doses of phosphorus and potassium. Four different levels of...

Field experiment was conducted to assess the response of five rice varieties; IR6, IR8, DR92, DR84 and Shahkaar at different treatments of fertilizers. Higher uptakes; 4.08± 0.37, 4.72±0.45, 3.88±0.24, 2.47±0.09, 4.08±0.14 μg g 1 of boron; 15.08±0.83, 12.29±0.05, 13.35±0.57, 11.67±0.3, 15.65±0.21 μg g 1of Zn and 36.98±0.5, 23.65±0.0.59, 28±0.41, 28...

Besides NPK, zinc and boron fertilizers are needed to improve grain yield and quality with respect to physicochemical properties such as yield, thousand grains mass, protein and fat content. Responses of varieties may vary over micronutrient fertilization in conjunction with the recommended doses of N and P fertilizers. In this connection the exper...

This study presents an improved method for quantitative analysis of imidacloprid residues in wheat grain using high performance liquid chromatography. The study used chromatographic response (in terms of peak height) as a quantitative tool for determination instead of peak area. The peak height of imidacloprid showed a very good linear correlation...

A simple, easy, cheap and efficient analytical method for determination of multiple pesticide residues including organochlorine, organophosphorus, synthetic pyrethroids and herbicides in rice grain by capillary gas chromatography is developed. The quantification of residues was done by capillary gas chromatography with a μ-ECD detector and a HP-5MS...

The undesirable effects of green revolution include residues of extensively used pesticides in various food commodities. Several studies showed that pesticides could cause health problems. Keeping in view the problem of pesticide residues in various food commodities, the present study was conducted on domestic stored wheat as well as on imported wh...

A monitoring study was carried out with the aim to assess the level of toxic metals i.e., lead (Pb), cadmium (Cd), arsenic (As) and mercury (Hg) in different vegetables grown in Sindh province of Pakistan during 2007-2008. Two hundred ten samples of twenty one vegetables were collected from farmers' field of Sindh and exporters at Karachi. These sa...