Abstract:
PROBLEM TO BE SOLVED: To provide a method for precisely and simply measuring a very small amount of an element such as lead or the like in a resin material. SOLUTION: This quantitative analyzing method of a very small amount of a metal element being a harmful substance such as lead or cadmium in the resin material has a process for decomposing a target substance in vitreous carbon by an oxidizing acid, a process for removing organic matter by low temperature ashing and a quantifying process for subsequently quantifying residual metal impurities. Especially, by setting the surface roughness of vitreous carbon to 10 μm or below, the deterioration of vitreous carbon due to high temperature heating can be prevented. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a high-reliability gasborne mercury measuring device which automatically cleans the outlet of a reduction tube or the inside a vapor/liquid separation tube that tends to have contamination adhere, without causing degradation of the sensitivity of the measuring device. SOLUTION: This gasborne mercury measuring device is equipped with a reduction tube 3 for reducing gasborne divalent mercury to zero-valent mercury, a vapor/liquid separation tube 4 for removing liquid component (drain) from a gas G that have passed through the reducting tube 3, a measuring instrument 6 for measuring the quantity of mercury in the gas G derived from the vapor/liquid separation tube 4, and a cleaning system 10 for allowing washing water to be passed through the vapor/liquid separation tube 4, from the outlet of the reduction tube 3 and then made to flow to the outside of the vapor/liquid separation tube 4. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a nitrogen compound analyzer for simply and precisely measuring two components of NH 3 and NO 2 or respective components of nitrogen compounds in the same sample. SOLUTION: In the nitrogen compound analyzer having a plurality of sample treatment systems formed by branching one sample and at least one measuring means for continuously measuring nitrogen monoxide in the sample, a switching means capable of switching a treatment system (A) having an oxidation means for oxidizing ammonia in the sample and a conversion means for converting nitrogen dioxide in the sample to nitrogen monoxide, a treatment system (B) having a conversion means for converting nitrogen dioxide in the sample to nitrogen monoxide and a treatment system (C) not applying conversion treatment to a specific component in the sample is provided so as to be capable of switching these treatment systems to a predetermined combination. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PURPOSE:To perform the analysis of inorg. carbon and org. carbon due to a halogen compound in a water specimen, by filling a reaction tube for converting inorg. carbon to CO2 with a non-oxidative acid containing Ag to remove halogen. CONSTITUTION:In the analysis of inorg carbon (IC) such as carbonic acid or carbonic ion in rivers, ocean, sewage or industrial waste water, a reaction tube 2 converting IC to CO2 succeeding to a carrier supply part 1 is filled with one obtained by impregnating a holding material 8 such as a quartz glass chip with a non-oxidative acid such as H3PO4 containing Ag or directly filled with an acidic silver phosphate crystal. A specimen is sent from an injection part 2' while a carrier gas is sent to immobilize the halogen in the specimen as silver halide by the packing material 8 and the product gas is passed through a dehumidifier 3 along with the carrier gas to be sent to a gas analytical part 4. The measured value of CO2 is recorded by a recorder 7. When org. carbon is measured, the reaction tube 8 is aranged next to a combution tube holding an oxidizing catalyst. By this method, the influence of halogen is eliminated to perform accurate analysis of C due to an infrared analyser.