carbon disulfide/dichloromethane

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مقالاتالتجارب السريريةبراءات الاختراع

اختر نوع الفرز

13 النتائج

Monitoring of occupational exposure to dichloromethane by diffuse vapor sampling and urinalysis.

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OBJECTIVE The aim of the present study was to develop valid methods for monitoring of occupational exposure to dichloromethane (DCM). METHODS Carbon cloth as an adsorbent in diffusive sampling was tested for its capacity to adsorb DCM vapor and to retain adsorbed DCM after termination of the

Solvent vapour monitoring in work space by solid phase micro extraction.

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Solid phase micro extraction (SPME) is a fast, solvent-less alternative to conventional charcoal tube sampling/carbon disulfide extraction for volatile organic compounds (VOC). In this work, SPME was compared to the active sampling technique in a typical lab atmosphere. Two different types of fibre

Determination of phosphine and other fumigants in air samples by thermal desorption and 2D heart-cutting gas chromatography with synchronous SIM/Scan mass spectrometry and flame photometric detection.

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Fumigants and volatile industrial chemicals are particularly hazardous to health when a freight container is fumigated or the contaminated material is introduced into its enclosed environment. Phosphine is now increasingly used as a fumigant, after bromomethane--the former fumigant of choice--has

Fibrillar morphology of derivatives of poly(3-alkylthiophene)s by solvent vapor annealing: effects of conformational transition and conjugate length.

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A fibrillar morphology was obtained, compared to the featherless pristine films, via solvent annealing the films of a series of derivatives of poly(3-alkylthiophene)s (P3ATs): poly(3-dodecylthiophene) (P3DDT), poly(3,3'''-didodecyl-quaterthiophene) (PQT12), and

In Search of a Green Process: Polymeric Films with Ordered Arrays via a Water Droplet Technique.

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As an efficient technique for the preparation of polymeric hexagonal orderly arrays, the breath figure (BF) process has opened a modern avenue for a bottom-up fabrication method for more than two decades. Through the use of the water vapor condensation on the solution surface, the water droplets

Health risk assessment of odors emitted from urban wastewater pump stations in Tianjin, China.

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In order to evaluate the potential adverse health effects of odor emissions from wastewater pump stations (WWPSs) to human, a health risk assessment was performed to study the odors emitted from an urban WWPS in a residential area, Tianjin (in North China). First, 15 types of volatile organic

Rapid hydrocarbon analysis using a miniature rectilinear ion trap mass spectrometer.

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A miniature ion trap mass analyzer was applied to the analysis of traces of hydrocarbons and simple heteroatomics in the vapor phase and in aqueous solution. Vapors of acetone, acetic acid, acetonitrile, benzene, butanethiol, carbon disulfide, hexane, dichloromethane, naphthalene, toluene and

Selection of desorbing solvents for organic compounds from active carbon tubes.

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To ensure the effective performance of active carbon tubes for working environment measurements, suitable desorbing solvents were selected for 46 kinds of organic compounds by the phase equilibrium method. The criteria for suitable desorbing solvents in this study was desorption of the objective

Piperazine-functionalized C60 and diiodine or iodine monochloride as components in forming supramolecular assemblies.

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The reaction of the piperazine mono-adduct, N(CH2CH2)2NC60, with diiodine produced well ordered, black crystals of (I2N(CH2CH2)2NI2)C60·2.884(C6H6)·0.116I2, which contains two nearly linear N-I-I units. Reaction of N(CH2CH2)2NC60 with iodine monochloride produced two materials: the dihalogen adduct,

Technetium-99m spiperone dithiocarbamate: a potential radiopharmaceutical for dopamine receptor imaging with SPECT.

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Spiperone dithiocarbamate (SPDC) was prepared by reacting spiperone with carbon disulfide followed by sodium hydroxide. SPDC was labelled with 99mTc by reduction of pertechnetate with formamidine sulfinic acid or sodium dithionite at alkaline pH, resulting in approximately 40% incorporation of

Study of the composition of tars produced from blends of coal and polyethylene wastes using high-performance liquid chromatography.

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Tars produced at semi-industrial scale in a coke oven of 6 x 10(3) kg capacity were used to investigate the effect of using polyethylene waste as an additive in the carbonization process with coal. The polyethylene wastes used were low-density polyethylene from the agriculture greenhouses and

Simultaneous anaerobic transformation of tetrachloroethene and carbon tetrachloride in a continuous flow column.

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Tetrachloroethene (PCE) and carbon tetrachloride (CT) were simultaneously transformed in a packed column that was bioaugmented with the Evanite culture (EV). The data presented here have been obtained over a period of 1930days. Initially the column was continuously fed synthetic groundwater with PCE

Odor composition analysis and odor indicator selection during sewage sludge composting.

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On the basis of total temperature increase, normal dehydration, and maturity, the odor compositions of surface and internal piles in a well-run sewage sludge compost plant were analyzed using gas chromatography-mass spectrometry with a liquid nitrogen cooling system and a portable odor detector.

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