Haleh Omoori Sarabi; Zarrin Eshaghi; Javad Feizy
Abstract
For the first time, hollow fiber-solid liquid phase microextraction (HF-SLPME) using multiwalled carbon nanotube- ion exchange polyurethane foam (MWCNT-PUFIX) as adsorbent along with graphite furnace atomic absorption spectrometry was used to extract and measure the anticancer drug cisplatin. In this ...
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For the first time, hollow fiber-solid liquid phase microextraction (HF-SLPME) using multiwalled carbon nanotube- ion exchange polyurethane foam (MWCNT-PUFIX) as adsorbent along with graphite furnace atomic absorption spectrometry was used to extract and measure the anticancer drug cisplatin. In this method, the nanocomposite dispersed in octanol, is located in the pores and lumen of a porous polypropylene hollow fiber, was used as the extracting phase, this method benefits from high selectivity, high sample purification and enrichment, and reducing the consumption of organic solvents. The major factors affecting the extraction efficiency were investigated. The validation of the method was assessed by linearity, limit of detection, and accuracy calculated as relative recovery percent. The calibration curve was constructed under the optimal conditions was linear in the range of 1.00-55.0 µg/mL and the detection limit was 0.5 µg/mL. This method was successfully used for analysis of biological samples and the obtained results showed that the method has good accuracy and precision.
Aida Esmati Arze Olia; Javad Feizy
Abstract
In the present study, a novel sorbent-based microextraction method was developed for the quick extraction of ochratoxin A from food samples. The extraction was performed based on graphene-reinforced fabric phase sorptive extraction (FPSE) followed by HPLC-FLD analysis. Chromatographic separations were ...
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In the present study, a novel sorbent-based microextraction method was developed for the quick extraction of ochratoxin A from food samples. The extraction was performed based on graphene-reinforced fabric phase sorptive extraction (FPSE) followed by HPLC-FLD analysis. Chromatographic separations were performed on a C18 column with H2O: ACN: acetic acid (49:49:2, v/v/v) as mobile phase at a flow rate of 1.0 mL/min and with fluorescence detection (λex= 333 nm and λem= 447 nm). The effect of graphene in the sol solution, extraction time, ionic strength, solvent extraction volume, desorption time, and desorption solvent type and volume were evaluated to obtain the maximum extraction efficiency. The optimum condition was obtained at pH=7, 40 mg of graphene per 10 mL of sol solution, 40 min for extraction time and 20 min for desorption time, the best solvent for desorption was 1 mL of ACN: HOAC (95:5 V/V) and extraction volume was 10 mL. The method showed a linear range of 2.0-17.5 ng/mL with a correlation coefficient greater than 0.97. The limit of detection and limit of quantification were found 0.49 ng/g and 1.49 ng/g, respectively with absolute good recoveries (67.7-104.0%) and low relative standard deviations. In addition, ochratoxin A was quantified with the developed method in wheat and chickpea samples and the results indicate the effectiveness of the presented method.
Javad Feizy; Sima Ahmadi; Moslem Jahani; R. Lakshmipathy
Abstract
The present investigation reports a quantitative analysis of metals in the saffron samples collected from seven different saffron production areas in the Khorasan Razavi province, Iran. Khorasan Razavi is the leading producer of saffron in Iran, and more than 95% of the global production of this expensive ...
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The present investigation reports a quantitative analysis of metals in the saffron samples collected from seven different saffron production areas in the Khorasan Razavi province, Iran. Khorasan Razavi is the leading producer of saffron in Iran, and more than 95% of the global production of this expensive spice is attributed to Iran. Since environmental pollution is increasing, saffron is contaminated with various organic and inorganic contaminants such as heavy metals. Twenty-one saffron samples were collected in the flowering season of 2018 and analyzed for metal content. The concentration of microelements and heavy metals including Zn, Fe, Ca, Mn, Mg, Na, K, Pb, Cd, Cu, and Cr was determined in the samples collected from three farms in each production area with graphite furnace and flame atomic absorption spectroscopy. The results revealed that the collected saffron stigmas contain a wide range of minerals and heavy metals with different concentrations. Potassium is the most abundant element, and Cd had the least concentration in the saffron. It can be concluded that ecological management plans such as reducing chemical fertilizers and improving organic fertilizers can decline the extent of heavy metals in the saffron.
