Rapid extraction of BTEX in water and milk samples based on functionalized multi-walled carbon nanotubes by dispersive homogenized-micro-solid phase extraction

This study involved the development of a novel, cost-effective, fast, and highly sensitive analytical technique for quantifying minimal amounts of the drug famotidine through chemiluminescence. The method is centred around the measurement of energy emitted as a result of the interaction between the drug and Luminol in an alkaline solution; this interaction generates an electronically excited intermediate state, releasing a portion of the system’s energy as photons. The method was sensitive for the analysis of famotidine. The linear calibration curve (LR) is obtained in the range 2-12 mg mL-1, with a high correlation coefficient (R2) of 0.9929. The molecular absorption coefficient (ε) was calculated at 2621×104 L mol-1 cm-1. The method displayed excellent sensitivity with a Sandell’s sensitivity of 1.287×10-5 mg cm-2, the detection limit (LOD) was found to be 0.0314 mg mL-1, and the limit of quantification (LOQ) was 0.0952 mg mL-1. This study found that recovery was obtained at 104 - 96.5 %, and the relative standard deviation (RSD%) was below 1.981%. The results showed that the proposed technique has efficient recovery for measuring famotidine in pharmaceutical preparations.

Section: Direct Methodsmentioning

confidence: 99%

Analytical Method: Determination of famotidine drug using chemiluminescence method

Y. Al-Samarrai

2024

“…Recently, many techniques based on nanoadsorbentshave been used for the removal of dye and other organic material (BTEX) in water samples [24][25][26][27][28][29][30][31]. To further demonstrate the superiority of our proposed method, a comparison of the important features of the proposed method with those reported in the literature [32][33][34][35] is given in Table 5.…”

Section: Copper Nanowires-ac For Bromophenol Blue Removalmentioning

confidence: 98%

Analysis, construction, characterization, and application of copper nanowires loaded on activated carbon for removal of bromophenol blue in water samples

Khodadoust,

Ghadri,

Zeraatpisheh

2024

In the present work, a copper nanowire loaded on activated carbon (Cu-NW-AC) was fabricated and applied as an effective adsorbent for the removal of bromophenol blue (BPB) dye from aqueous solutions and then the percentage of removal was evaluated by UV–Vis spectrophotometer. The synthesized adsorbent was characterized and identified using techniques like Transmission electron microscopy (TEM) and Brunauer–Emmett–Teller (BET). The effective parameters of the removal process were investigated and optimized by experimental design methodology (EDM) based on response surface methodology (RSM) as a powerful optimization method. EDM is a unique method for following the effects of different factors on the removal process simultaneously. Analysis of variance (ANOVA) was used based on p-values and F-tests to investigate the accuracy and reliability of the used method. The optimized parameters were obtained as BPB concentration of 15 mg L-1, ultrasonic irradiation time of 14 min, adsorbent dosage of 0.018 g and pH= 5.5 under the desirability function. To evaluate the adsorption mechanism and calculation of maximum adsorption capacity, different adsorption isotherms were studied and according to the results, the Langmuir isotherm model showed the highest compatibility due to its higher R2 (0.9905). Also, the proposed adsorbent represented good adsorption capacity (123.45 mg g-1).

“…As opposed to typical adsorbent materials, CNTs offer great chemical stability, higher surface area, smaller pore size, hollow structure, and ease of modifying; these benefits make CNTs a more favorable adsorbent than traditional adsorbent for preparing samples techniques in addition to their purity, surface area, functional groups on the surface, adsorption sites, and experimental settings, CNTs' adsorption effectiveness also depends on these factors [20]. Also, dyes and other organic compounds (BTEX) can be extracted by nanostructures such as CNTs, graphene (G), graphene oxide(GO), silica (SiO 2 ), and Metal-organic frameworks (MOFs) by SPE methods before being determined by the liquid or gas chromatography (GC-FID/ GC-MS/ HPLC) in liquid phases [21][22][23][24][25][26][27]. This paper aims to examine the feasibility of utilizing a multi-walled carbon nanotube and its derivatives as a solid phase in solid-phase extraction (SPE) for the purification of water contaminated with organic hazardous dye Bismarck Brown-y, 1,3-Benzenediamine, 4,40 -[1,3-phenylenebis (2,1-diazenediyl)] bis-, hydrochloride (1:2) (Fig.…”

Section: Introductionmentioning

confidence: 99%

Solid phase-fabrication of multi-walled carbon nanotubes and their derivatives for efficient extraction and analysis of Bismarck Brown-Y Dye from aqueous solution

Saleh,

Abdulwahid,

N. Kadhim

2024

This investigation used efficientMWCNTs and their derivatives; MWCNT-Tris, MWCNT-H, MWCNT-Tetra and MWCNT-G, for extraction and removing the Bismarck Brown-Y (BB-Y) by solid phase extraction (SPE). The concentration of BB-Y was measured by UV-Vis spectrophotometer after the SPE technique. The solid phases were analyzed and characterized by utilizing several techniques, including Fourier Transform Infrared Spectroscopy (FTIR), FE-SEM, zeta potential measurement, and X-ray Diffraction (XRD). At optimization conditions, the optimum concentration of the BB-y was obtained at 200 mgL-1 and 300 mg L-1 for MWCNT and MWCNT-Tris, whereas 400 mg L-1 for MWCNT-H, MWCNT-Tetra, and MWCNT-G. Additionally, the optimal pH value was 6.0 for MWCNT-Tris, and it was 10 for MWCNT, MWCNT-H, MWCNT-Tetra, and MWCNT-G. However, the volume of samples was achieved at 25 mL. Furthermore, it was found that the most effective flow rate for the eluting solvent was 0.5 ml min-1. Besides the type and volume of eluents were examined and evaluated. Finally, the present work involved the determination of adsorption capacity using Langmuir and Freundlich isotherm models under ideal conditions. The Langmuir model revealed that the qmax for the MWCNT, MWCNT-tris, MWCNT-H, MWCNT-Tetra, and MWCNT-G was obtained 862.07, 1075.27, 1282.05, 1298.70, and 1333.33 mg g-1, respectively.