Disclosed is a sample pretreatment method of microextraction tube injection, comprising providing a capillary micro-extraction tube with extracting medium in it as an injector, passing a sample through the capillary micro-extraction tube, during which an analyte is extracted into an extracting medium inside the capillary micro-extraction tube; then, filling the capillary micro-extraction tube with an organic solvent and keeping the filling for a certain period of time, so that the extracted analyte is dissolved in the organic solvent inside the capillary micro-extraction tube to form an injection solution; finally, keeping one end of the capillary micro-extraction tube sealed and inserting the other end directly into an injection port of a gas chromatography, such that the injection solution is automatically ejected out from the capillary micro-extraction tube into the injection port.

One aspect of the present invention relates to a water purification filter including: a first support member; an activated carbon layer containing activated carbon and a fibrous binder; and a second support member. A 10% particle diameter (D10) of the activated carbon in a cumulative size distribution at volume standard is 19 to 90 μm, a 50% particle diameter (D50) of the activated carbon in the cumulative size distribution at volume standard is 120 to 180 μm, and a 90% particle diameter (D90) of the activated carbon in the cumulative size distribution at volume standard is 180 to 250 μm. The first support member has an airflow resistance of 0.5 to 10 mm H.sub.2O. The second support member has an airflow resistance of 0.5 to 7 mm H.sub.2O. The activated carbon layer has a thickness of 3 to 10 mm.

Carbon dioxide (CO.sub.2) capture materials comprising one or more 3D-printed zeolite monoliths for the capture and or removal of CO.sub.2 from air or gases in enclosed compartments, including gases or mixtures of gases having less than about 5% CO.sub.2. Methods for preparing 3D-printed zeolite monoliths useful as CO.sub.2 capture materials and filters, as well as methods of removing CO.sub.2 from a gas or mixture of gases in an enclosed compartment using 3D-printed zeolite monoliths are provided.

The present invention describes the process of preparing ceramic materials for absorption of acidic gases, mainly carbon dioxide, in exhaust systems and/or present indoors. Ceramic materials are formed by a mixture of alkali carbonate with alkaline earth metal oxide/hydroxide associated with a binding component, but non-limiting. The alkali carbonate comprises sodium, potassium carbonate, or a mixture of both. The alkaline earth metal oxide/hydroxide may be formed from magnesium oxide or magnesium hydroxide as well as calcium oxide and/or calcium hydroxide.

An object is to provide an adsorbing material using activated carbon fiber, suitable for motor vehicle canisters, and enabling reduction in pressure loss. Another object is to provide a formed adsorber using activated carbon fiber, with improved mechanical strength, and having excellent effects of an adsorbing material for canisters. The formed adsorber for canisters satisfies the following conditions (1) to (3). (1) The formed adsorber includes: an adsorbing material including activated carbon fiber; and a binder. (2) A ratio of a content of the binder to a content of the adsorbing material including the activated carbon fiber is 0.3 to 20 parts by weight of the binder to 100 parts by weight of the adsorbing material including the activated carbon fiber. (3) The activated carbon fiber has a fiber size of 13.0 μm or larger.

Materials and methods for mitigating the effects of halide species contained in process streams are provided. A halide-containing process stream can be contacted with mitigation materials comprising active metal oxides and a non-acidic high surface area carrier combined with a solid, porous substrate. The halide species in the process stream can be reacted with the mitigation material to produce neutralized halide salts and a process stream that is essentially halide-free. The neutralized salts can be attracted and retained on the solid, porous substrate.

A particulate plug for removing a preservative from a solution, suspension, or emulsion comprising a drug is presented. The plug comprises microparticles of a hydrophobic polymer/fatty acid blend. The microparticles of hydrophobic polymer/fatty acid blend selectively absorb preservative allowing the drug to remain in solution for delivery.

In one aspect, the present invention provides a chromatographic stationary phase material for various different modes of chromatography represented by Formula 1: [X](W).sub.a(Q).sub.b(T).sub.c (Formula 1). X can be a high purity chromatographic core composition having a surface comprising a silica core material, metal oxide core material, an inorganic-organic hybrid material or a group of block copolymers thereof. W can be absent and/or can include hydrogen and/or can include a hydroxyl on the surface of X. Q can be a functional group that minimizes retention variation over time (drift) under chromatographic conditions utilizing low water concentrations. T can include one or more hydrophilic, polar, ionizable, and/or charged functional groups that chromatographically interact with the analyte. Additionally, b and c can be positive numbers, with the ratio 0.05≤(b/c)≤100, and a≥0.

The present description provides high working capacity adsorbents with low DBL bleed emission performance properties that allows the design of evaporative fuel emission control systems that are lower cost, simpler and more compact than those possible by prior art. Emission control canister systems comprising the adsorbent material demonstrate a relatively high gasoline working capacity, and low emissions.

A composite material for gas capture, notably CO.sub.2 capture and storage. The composite material includes a mixture of a solid or liquid reactive filler and a gas-permeable polymer such that the reactive filler forms micron-scale domains in the polymer matrix.