فهرس المقالات Food dyes

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  1 - Electrochemical Analysis of Sunset Yellow Based on NiO-SWCNTs NC/IL Modified Carbon Paste Electrode in Food Samples
  S. A. Shahidi P. Ebrahimi T. Zabihpour S. Naghizadeh Raeisi
  In this study, arapid and sensitive electrochemical electrode was fabricated to measure the amount of sunset yellow in food samples. This analytical sensor was mediated using a NiO-decorated single-walled carbon nanotubes (NiO-SWCNTs) nanocomposite and N-octylpyridinium أکثر

  In this study, arapid and sensitive electrochemical electrode was fabricated to measure the amount of sunset yellow in food samples. This analytical sensor was mediated using a NiO-decorated single-walled carbon nanotubes (NiO-SWCNTs) nanocomposite and N-octylpyridinium hexafluorophosphate ionic liquid (IL). The morphology of the NiO-SWCNTs nanocomposite was investigated by means of X-Ray Diffraction (XRD) and Transmission electron microscopy (TEM) methods. Cyclic Voltammetry (CV) and Square Wave Voltammetry (SWV) techniques were utilized to verify the appropriateness of the suggested sensor. In comparison to the bare carbon paste electrode (CPE), the electrochemical response of modified electrode had a considerable improve. According to the Chronoamperometry and scan rate analyses, diffusion index (D) and transfer coefficient (α) were obtained 1.8×10-5 cm2/s and 0.52, respectively. The outcomes achieved from SWV technique demonstrated a reasonable linear dynamic range (LDR) between 0.09 and 750 µM, and the Limit of Detection (LOD) was obtained 0.05 µM. Eventually, the quantity of sunset yellow in real samples showed a recovery range between 99.2 and 99.86%, confirming the accuracy of the proposed sensor. تفاصيل المقالة
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  2 - Determination of Ultra Trace Amounts of Carmoisine in Food Specimens by Ultrasound-assisted Surfactant-enhanced Emulsification Microextraction Method Coupled with UV-Visible Spectrophotometry
  Mohammad Reza Jalali Sarvestani Zohreh Doroudi
  10.22034/jchr.2021.1923785.1265
  In this research, an ultrasound-assisted surfactant emulsification microextraction technique was established as a facile, practicable and eco-friendly method for preconcentration of carmoisine (CMS) before its spectrophotometric measurement. Zephiramine and CCl4 were se أکثر

  In this research, an ultrasound-assisted surfactant emulsification microextraction technique was established as a facile, practicable and eco-friendly method for preconcentration of carmoisine (CMS) before its spectrophotometric measurement. Zephiramine and CCl4 were selected as the emulsifier and organic extractant solvent respectively. Box–Behnken design was employed for the optimization of various influencing factors in the extraction process. Under the optimized conditions, the preconcentration and enrichment factors were 666 and 630 respectively.. The limit of detection (LOD) of the designed analytical that was calculated as three times the signal-to-noise ratio (S/N) was 0.15 ng. mL-1. The limit of quantification (LOQ) was 0.47 ng. mL-1 and the working dynamic range was 0.5-80 ng. mL-1 with the correlation coefficient of 0.9995. At the end, the applicability of the designed extraction technique for the quantitation of CMS in four real specimes was also inspected and all of the calculated recovery values were between 97.5-104.2% showed the designed technique can be employed for CMS measurement in real specimens.. تفاصيل المقالة