Determination Of Dibutyl Phthalate Research Articles

Efficient Near-Infrared Light-Responsive Imprinted Polymers as Pipette Tip Microsolid Phase Extraction Sorbent for Extraction and Determination of Dibutyl Phthalate in Plastics

Efficient Near-Infrared Light-Responsive Imprinted Polymers as Pipette Tip Microsolid Phase Extraction Sorbent for Extraction and Determination of Dibutyl Phthalate in Plastics

Surface blocking of azolla modified copper electrode for trace determination of phthalic acid esters as the molecular barricades by differential pulse voltammetry: response surface modelling optimized biosensor.

In this work, a sensitive and efficient voltammetric biosensor was introduced for differential pulse voltammetric (DPV) determination of some phthalic acid esters (PAEs) including dibutyl phthalate (DBP), dimethyl phthalate (DMP), di(2-ethylhexyl)phthalate (DEHP) and dicyclohexyl phthalate (DCHP) in aqueous solutions. Briefly, the surface of a copper electrode was modified by azolla paste prepared using azolla powder and electroencephalography gel (EEG). The modified surface was characterized by electrochemical impedance spectroscopy (EIS), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), Brunauer–Emmett–Teller (BET) analysis and energy dispersive X-ray (EDX) methods. Determination of PAEs was conducted based on their blocking effect on the electrode surface for ferrous ion oxidation. The central composite design (CCD) was conducted to optimize the effects of four experimental parameters including the concentration of Fe2+ ions (CFe2+) and supporting electrolyte (Csup. elec), solution pH and modifier/gel mass ratio on the decrease in the anodic peak current of ferrous ions as the response. Predicted optimal conditions (CFe2+= 319 μM, Csup. elec= 0.125 M, pH = 7.52 and modifier/gel mass ratio = 0.19) were validated by experimental checking which resulted in an error of 1.453%. At the optimum conditions, linear relationships were found between the DPV responses and PAEs concentrations and the limit of detection (LOD) and limit of quantification (LOQ) values were in the ranges of 0.2–0.4 μg L−1 and 0.5–1.0 μg L−1, respectively. Good recovery percentages ranging from 97.3 to 100.3% with RSD < 3.2% suggested the proposed method for efficient, accurate and quick determination of PAEs in real water samples.

Erratum to: A one-step incubation ELISA kit for rapid determination of dibutyl phthalate in water, beverage and liquor

Erratum to: A one-step incubation ELISA kit for rapid determination of dibutyl phthalate in water, beverage and liquor

Molecularly imprinted polymer based on metal-organic frameworks: synthesis and application on determination of dibutyl phthalate

ABSTRACT The molecular surface imprinted graft copolymer of metal-organic framework MOF-5 with methacrylic acid were prepared by free radical polymerization with dibutyl phthalate as the template molecule using initiator of azobisisobutyronitrile as adsorption system. The prepared MIPs@MOF-5 were characterized by fourier transform infrared spectroscopy, scanning electron microscopy, Brunner−Emmet−Teller measurements, adsorption isotherms, kinetics and selectivity experiments, which showed higher specificity, sensitivity, stability, and better adsorption performance. The results suggested that MIPs@MOF-5 had two sites of adsorption behavior and can recognize sensitively and selectively the template molecules. Moreover, the MIPs@MOF-5 was successfully applied to the analysis of tap water sample.

Determination of Dibutyl o‐Phthalate by Antigen‐Coated Competitive Fluorescence Immunoassay

A reliable and sensitive competitive fluorescence immunoassay for the quantitative determination of dibutyl phthalate (DBP) was developed. The hapten of dibutyl phthalate was synthesized. The hapten‐protein conjugate was used as an immunogen, demonstrating that it is suitable for polyclonal antibody production. With this polyclonal antibody, a novel fluorescence immunoassay for detection of DBP was described. Under best conditions, DBP can be determined in the concentration range of 0.1∼100 µg/L with a detection limit of 0.05 µg/L. The cross‐reactivities of the anti‐DBP antibody to six structurally related phthalate esters were below 9%. Some environmental samples were analyzed with satisfactory results.

Method for determination of plasticizers in industrial emissions

A simple method has been developed for the determination of dibutyl phthalate, di-(2-ethylhexyl) phthalate, diisodecyl phthalate, and di(2-ethylhexyl) adipate in industrial emissions. A cartridge packed with a modified silica gel is used as adsorbent and adsorbed compounds are eluted and analyzed by HPLC in normal and reversed phase system.

Determination of Dimethyl, Diethyl, and Dibutyl Phthalates in Small Arms Double-Base Propellants by Gas Chromatography

Abstract : Rapid and accurate methods are proposed for the determination of dimethyl, diethyl, and dibutyl phthalates in small arms double-base propellants by gas chromatography. The phthalates are extracted from the propellant with methylene chloride and an aliquot is passed through a silicone rubber SE-30 column at a temperature of 200C for dimethyl and diethyl phthalates and 230C for dibutyl phthalate. Triacetin is used as the internal standard in the determination of dimethyl and diethyl phthalates, while dimethyl sebacate is used as the internal standard in the determination of dibutyl phthalate. None of the compounds found in ordinary small arms propellants interferes with the methods. Diphenylamine produces a peak that would interfere. However, it was found that the nitroglycerin usually present in small-arms propellants containing phthalates decomposes in the injector and the column and nitrates the diphenylamine and in this manner eliminates the interference from diphenylamine. (Author)

Polarographic determination of dibutylphthalate in propellant compositions containing nitroglycerine.

Polarographic determination of dibutylphthalate in propellant compositions containing nitroglycerine.