نتایج جستجو برای: toluene vapor
تعداد نتایج: 44566 فیلتر نتایج به سال:
OBJECTIVES The aim of this investigation was to use activated carbon cloth (ACC) patches to study the probability and extent of dermal exposure to benzene and toluene in a shoe factory. METHODS Inhalation and dermal exposure loading were measured simultaneously in 70 subjects on multiple days resulting in 113 observations. Dermal exposure loading was assessed by ACC patches attached to likely...
Objectives . To investigate the effectiveness of various options for organizing process diabatic distillation in separation a mixture acetone–toluene–n-butanol by extractive (ED) with dimethylformamide as an entrainer scheme where is used first column. Methods Mathematical modeling Aspen Plus v. 12.1 software package was primary research method. The local Non-Random Two Liquid composition equat...
An improved method was developed and validated for measuring low-level concentrations of toluene diisocyanates (TDls) in air. The method is based on OSHA Method 42 for industrial applications. Airborne TDls were trapped on a 25-mm glass-fiber filter impregnated with 50 pg of 1-(2pyridy1)piperazine. A filter holder for was constructed to minimize contamination and losses of the analytes. The der...
The behavior of pr imary, secondary, tert iary and quaternary dodecylammonium chloride and bromide in benzene and toluene was investigated by surface tension measurements , the dye-solubilizafion and iodine-complex formation method and vapor pressure osmometry a t 37 ° and 50°C. The smooth cont inui ty in the measured properties of these solutions as a function of concentration has been interpr...
Scaling of the homogenous vapor-to-liquid nucleation rate, J, is observed in a model Lennard-Jones (LJ) system. The model uses Monte Carlo simulation-generated small cluster growth to decay rate constant ratios and the kinetic steady-state nucleation rate formalism to determine J at four temperatures below the LJ critical temperature, T{c}. When plotted vs the scaled supersaturation, lnS/[T{c}/...
An application of spectral analysis to the transient response signals of ALD-fabricated conductometric sensors (chemiresistors) upon exposure to short vapor pulses is discussed. It is based on the representation of a response curve in the frequency domain, followed by the multi-dimensional Quadratic Discriminant Analysis (QDA) for analyte identification. Compared to the standard steady-state am...
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