摘要:
An aliphatic hydrocarbon solvent solution obtained by extracting dioxins contained in a specimen such as soil with an aliphatic hydrocarbon solvent is supplied to an alumina layer 33 side of a sample-preparation column 30 in which the alumina layer 33 is placed on a carbon material layer 32. Upon flowing and passing of an aliphatic hydrocarbon solvent through the alumina layer 33 and the carbon material layer 32 in this order, the dioxins contained in the aliphatic hydrocarbon solvent solution are trapped in these layers. Then, one extracting solvent among toluene, a mixed solvent of toluene and an aliphatic hydrocarbon solvent, and a hydrophilic solvent capable of dissolving dioxins is supplied to the sample-preparation column 30 in the direction opposed to the passing direction of the aliphatic hydrocarbon solvent, the dioxins trapped in the carbon material layer 32 and the alumina layer 33 are extracted to obtain a sample for analysis of dioxins.
摘要:
Device for recovering a material to be measured comprising a reservoir filled with a sample holding material impregnated with a sample liquid in which a material to be measured is dissolved and an adsorbing column for adsorbing the material to be measured, wherein the reservoir and the adsorbing column are communicated by a straight pipe, and further communicated with a recovery vessel via a recovery pipe branched out the straight pipe. Accordingly, operations of opening/closing or switching a first valve provided on the in-flow side of the reservoir, a second valve provided on the out-flow side of the adsorbing column, and a third valve provided to a vent hole to the atmosphere in the recovery vessel, make it possible to recover the material to be measured without depositing the material on the valves.
摘要:
The collecting filter can capture and collect various chlorinated organic compounds in both particulate form and gaseous form contained in a fluid at the same time, and is easy to extract the collected chlorinated organic compounds therefrom. This collecting filter 7 is provided with a fluid-permeable molded body containing fibers and an inorganic binder for binding the fibers to one another, and a hydrophobic material having higher hydrophobicity than that of the fibers and the inorganic binder, which is retained in the molded body. When the collecting filter 7 is disposed in a holder 6 having a discharging path 12a, and a sample gas containing various chlorinated organic compounds is flown into the holder 6 from a flue 25 via a collecting tube 2 and an introducing tube 8, the various chlorinated organic compounds such as dioxins in both particulate form and gaseous form contained in the sample gas are captured and collected upon passage through the collecting filter 7, and the sample gas is discharged through the discharging path 12a to the outside.
摘要:
A collector is provided which is capable of simultaneously capturing and collecting particulate and gaseous chlorinated organic compounds contained in a fluid. The collector 3 includes a housing 6 and a captor 7 disposed within the housing 6. The captor 7 includes a tubular porous core member 7a of a sintered glass having one end closed with a close member 7c, and a gas-permeable sheet 7b fitted around the core member 7a. The gas-permeable sheet 7b is, for example, a paper-like sheet having a fibrous activated carbon and inorganic fibers. The particulate and gaseous chlorinated organic compounds contained in a gas sample flowing into the captor through a sampling tube 2 are simultaneously collected and removed from the gas sample by the core member 7a and the gas-permeable sheet 7b, and the gas sample free from the chlorinated organic compounds is then discharged from an outlet port 6b.
摘要:
A highly reliable hydrophilic sample for analysis of dioxins suitable for analysis through a bioassay method is prepared from a hydrophilic solution of dioxins simply and in a short period of time. A preparation method for a sample for analysis of dioxins includes: supplying a hydrophobic solution of dioxins to a latter column (22) filled with a silica gel-based filler (22a); supplying to and passing through the latter column (22) supplied with the hydrophobic solution a hydrophobic solvent; supplying to and passing through a solvent substitution column (30) filled with an alumina-based filler (30a) the hydrophobic solvent passed through the latter column (22); supplying to and passing through the solvent substitution column (30) a hydrophilic solvent capable of dissolving dioxins from a second solvent supply part (70) in a direction opposite to the direction of the hydrophobic solvent passed through the solvent substitution column (30); and acquiring the hydrophilic solvent passed through the solvent substitution column (30).
摘要:
Device for recovering a material to be measured comprising a reservoir filled with a sample holding material impregnated with a sample liquid in which a material to be measured is dissolved and an adsorbing column for adsorbing the material to be measured, wherein the reservoir and the adsorbing column are communicated by a straight pipe, and further communicated with a recovery vessel via a recovery pipe branched out the straight pipe. Accordingly, operations of opening/closing or switching a first valve provided on the in-flow side of the reservoir, a second valve provided on the out-flow side of the adsorbing column, and a third valve provided to a vent hole to the atmosphere in the recovery vessel, make it possible to recover the material to be measured without depositing the material on the valves.
摘要:
The collecting filter can capture and collect various chlorinated organic compounds in both particulate form and gaseous form contained in a fluid at the same time, and is easy to extract the collected chlorinated organic compounds therefrom. This collecting filter 7 is provided with a fluid-permeable molded body containing fibers and an inorganic binder for binding the fibers to one another, and a hydrophobic material having higher hydrophobicity than that of the fibers and the inorganic binder, which is retained in the molded body. Various chlorinated organic compounds such as dioxins in both particulate form and gaseous form contained in the sample gas are captured and collected upon passage through the collecting filter 7.
摘要:
An optical molding apparatus molds a three-dimensional model by stacking cured layers. Each cured layer is formed by emitting light according to cross-sectional-shape data of the three-dimensional model onto a surface of photo-curable resin. The optical molding apparatus includes a container that contains the photo-curable resin, a movable stage that is movable in a direction orthogonal to the surface of the photo-curable resin, an optical system that emits the light onto the surface of the photo-curable resin contained in the container so as to form each cured layer on the movable stage, and a discharging mechanism that performs a discharging operation for discharging new photo-curable resin onto a surface of each cured layer formed on the movable stage before stacking a subsequent cured layer.
摘要:
A deaeration method for eliminating dissolved gases from a liquid product, which method involves low initial cost and running cost, compact equipment, and simple arrangement to accomplish the deaeration. For the method to eliminate dissolved gases from a liquid product, a deaeration module which is divided by a gas-pervious membrane into a liquid phase side and a vapor phase side is used. A deaeration-use gas composed of one or more kinds of inactive gases is previously dissolved in a liquid product to be deaerated, whereby a deaeration-target liquid is prepared. The deaeration-target liquid is distributed on the liquid phase side, in which distribution process the deaeration-use gas moves to the vapor phase side via the gas-pervious membrane, while the dissolved gases move to the vapor phase side along with the movement of the deaeration-use gas. This movement of the gases is carried out during passage through the deaeration module under ambient pressure.
摘要:
An optical molding apparatus that molds a three-dimensional model by stacking cured layers. Each cured layer is formed by emitting light according to cross-sectional-shape data of the three-dimensional model onto a surface of photo-curable resin. The optical molding apparatus includes a container that contains the photo-curable resin, a movable stage that is movable in a direction orthogonal to the surface of the photo-curable resin, an optical system that emits the light onto the surface of the photo-curable resin contained in the container so as to form each cured layer on the movable stage, and a discharging mechanism that performs a discharging operation for discharging new photo-curable resin onto a surface of each cured layer formed on the movable stage before stacking a subsequent cured layer.