Preconcentration of carbamate insecticides in water samples by using modified stir bar with ZnS nanoparticles loaded on activated carbon and their HPLC determination: Response surface methodology

Fabrication of boron‐rich multiple monolithic fibers for the solid‐phase microextraction of carbamate pesticide residues in complex samples

“…Besides, the sensitivity obtained in this work is better than that obtained by other methods with the same kind of detector . It also can be seen from the comparison that the recoveries obtained in the present study are comparable with other mentioned methods . The comparison well demonstrates the proposed VPED/MMF‐SPME‐HPLC‐DAD method possesses some merits such as convenient operation, satisfactory sensitivity and eco‐friendliness, in the analysis of CPs.…”

“…However, the LODs achieved in the present method are lower than that achieved on SPE-HPLC-MS/MS [27] and LLME-MEKC-MS/MS [33]. Besides, the sensitivity obtained in this work is better than that obtained by other methods with the same kind of detector [21][22][23][24][28][29][30][31][32]. It also can be seen from the comparison that the recoveries obtained in the present study are comparable with other mentioned methods [21][22][23][24][25][26][27][28][29][30][31][32][33].…”

“…As shown, the consumption of organic solvent in the proposed method is at the same level as that used in micro-SPE (μ-SPE)-HPLC-UV [21], stir bar sorptive extraction-HPLC-UV [22], ultrasound-assisted surfactant enhanced mulsification microextraction-HPLC-UV [23], and less than other methods [24][25][26][27][28][29][30][31][32][33]. The consumed sample volume in the proposed method is slightly higher than that used it some reported methods [21][22][23][24]27,29,30,32,33], but far lower than that consumed in SPE-HPLC-MS/MS [25], SPE-HPLC-MS [26] and SPE-HPLC-UV [3]. Typically, for the determination of CPs, better sensitivity can be achieved when high sensitivity detector such as MS is used [25,26].…”

Synthesis of mesoporous silica for adsorption of chlordiazepoxide and its determination by HPLC: Experimental design

“…According to Supporting Information , at pH about 5–7 and the volume of desorption solvent in the range of 0.8 to 1.2 mL, the recovery rate is relatively good (70–80). The volume of desorption solvent is a significant factor affecting ER . In Supporting Information , at amount of sorbent about 9–11 mg and adsorption time at 12–18 min, the ER% is high (about 100%).…”

An Ag2S@ZnS‐coated fiber for efficient, long‐life solid‐phase microextraction of polycyclic aromatic hydrocarbons in water

“…Nanocomposite ZnS as a stable, non-toxic, and easy-toprepare material has potential application value in SPME technology. It has been found that ZnS nanomaterials have two reactive sites with analytes: (1) Zn site tends to interact with the structures containing OH group and (2) S site can react with π electrons of analytes [15]. It has also been reported that the introduction of metal element, especially Ag, into the matrix is proven to be an easy but effective way to enhance the properties [16][17][18][19].…”