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1. 发明专利

JP2003149124A ANALYTICAL DEVICE FOR FINE PARTICLES IN LIQUID 审中-公开
公开(公告)号：JP2003149124A
公开(公告)日：2003-05-21
申请号：JP2001349667
申请日：2001-11-15
申请人： RIKAGAKU KENKYUSHO
发明人： TAKEUCHI KAZUO , OKUYAMA KIKUO , WULED LENGGORO
IPC分类号： G01N27/60 , G01N15/02 , G01N15/06 , G01N15/10
摘要： PROBLEM TO BE SOLVED: To provide an analytical device for fine particles in liquid capable of accurately measuring the particle size distribution of fine particles such as nano-particles floating in liquid in a short time, and to provide its analytical method. SOLUTION: This analytical device for fine particles in liquid is equipped with a fine liquid drop producing device 3 forming in fine liquid drops liquid supplied from a sample container 1 through a metering pump 2 and forming a fine liquid drop group floating in carrier gas; an evaporator 4 evaporating the liquid component in the fine liquid drop group produced with a fine liquid drop producing device 3 and producing a fine particle group in an aerosol state floating in carrier gas; a differential electric mobility classifier 5 classifying the fine particle group in the aerosol state produced with the evaporator 4 every particle size according to the electric mobility; and a Faraday cup ammeter 6 counting the number concentration classified every particle size with differential electric mobility classifier 5. The fine liquid drop producing device 3 has an electric spray device 8 forming fine liquid drops from liquid in a charged state; and an atomization device 13 making float a charged fine liquid drop group formed in fine liquid drops with the electric splay device 8 in the carrier gas.

2. 发明专利

JP2001228076A CHARGED FINE PARTICLE MEASURING INSTRUMENT 失效
公开(公告)号：JP2001228076A
公开(公告)日：2001-08-24
申请号：JP2000037940
申请日：2000-02-16
申请人： RIKAGAKU KENKYUSHO
发明人： ISOMURA SHOHEI , SETSU KOSHU , OKADA YOSHIKI , TAKEUCHI KAZUO , OKUYAMA KIKUO , SHIMADA MANABU
IPC分类号： G01R29/24 , G01N15/06 , G01N27/60
摘要： PROBLEM TO BE SOLVED: To provide a charged fine particle measuring instrument, capable of highly accurately measuring the number concentration of fine particles extremely low in number concentration, suspended in gas under pressure conditions ranging from atmospheric pressure to a vacuum. SOLUTION: When gas-containing charged fine particles is introduced from a gas inlet pipe 3, gas flows in the internal space of a center electrode 6 by the pressure difference between the gas inlet pipe 3 and an exhaust pipe 4 and discharged to the outside from the exhaust pipe 4 through the ion collector 7 of the center electrode 6. At this time, the gas flowing in the internal space of the center electrode 6 collides with the ion collector 7, and a part is repelled to be discharged to the internal space of the center electrode 6 to collide with an ion collector 11. The charged fine particles, contained in the gas collide with the metal screens 9, 9, 13 of the ion collectors 7, 11, to discharge charge and the current generated as a result flows into a preamplifier 19 from the ion collectors 7, 11 through a support stand 15. This weak current is amplified by the preamplifier 19 to be measured by an ammeter 20.

3. 发明专利

JP2000002722A SMALL CURRENT METER 失效
公开(公告)号：JP2000002722A
公开(公告)日：2000-01-07
申请号：JP16732398
申请日：1998-06-15
申请人： RIKAGAKU KENKYUSHO
发明人： TAKEUCHI KAZUO , ISOMURA SHOHEI , HIRASAWA SEIICHI , OKUYAMA KIKUO
IPC分类号： G01R19/00
摘要： PROBLEM TO BE SOLVED: To provide a small current meter capable of reducing effectively the noise in a current to be measured. SOLUTION: A bar-shaped member 16 is installed projectingly from the bottom surface 18a of a plate 18 of a Faraday cup 10, and a receiving part 21 is installed on the upper surface 25a of an outer box 25 of a preamplifier device 20. In this case, external threads 16a are carved on the outer surface of an end part of the bar-shaped member 16, projecting downward from a fixed ring 17, and internal threads 21a are carved on the inner surface of the receiving part 21, and the bar-shaped member 16 is connected to the receiving part 21 by thread connection. A shield ring 22, encircling the connection part between the bar-shaped member 16 and the receiving part 21, is interposed between the bottom surface 18a of the plate 18 and the upper surface 25a of the outer box 25, to thereby shield an electromagnetic wave entering the connection part between the bar-shaped member 16 and the receiving part 21.

4. 发明专利

JPH10288602A FINE PARTICLE ANALYZING DEVICE AND ITS METHOD 失效
公开(公告)号：JPH10288602A
公开(公告)日：1998-10-27
申请号：JP9732797
申请日：1997-04-15
申请人： RIKAGAKU KENKYUSHO
发明人： TAKEUCHI KAZUO , OKUYAMA KIKUO , KYODO TSUNEHISA , SAKATA KENICHI
IPC分类号： G01N27/62 , G01N15/02 , G01N27/60 , G01N27/64 , G01N27/68
摘要： PROBLEM TO BE SOLVED: To enable the obtaining of the diameters, numbers, constituents of fine particles on the order of nanometers quantitatively through the use of a time-of-flight mass spectrometer. SOLUTION: Fine particles in the air drawn by a sampling device 1 are charged by a charging device 2. Next, the fine particles charged at the charging device 2 are each classified diameter by diameter by a differentiating electric mobility classifier (DMA) 3. At this time, the diameters of the fine particles which are classified by the DMA 3 are periodically changed. Then fine particles extracted out of the DMA 3 are sequentially introduced to a time-of-flight mass spectrometer (TOF-MS) 4 to analyze the mass of the fine particles and to integratingly process the results measured by the TOF-MS 4 for every particles of the same diameter on the basis of the sweep data of applied voltages at the DMS 3.

5. 发明专利

JPH10288601A DEVICE AND METHOD FOR ANALYZING FINE GRAIN 失效
公开(公告)号：JPH10288601A
公开(公告)日：1998-10-27
申请号：JP9732097
申请日：1997-04-15
申请人： RIKAGAKU KENKYUSHO
发明人： TAKEUCHI KAZUO , OKUYAMA KIKUO , KYODO TSUNEHISA , SAKATA KENICHI
IPC分类号： G01N27/64 , G01N15/02 , G01N27/62 , G01N27/68
摘要： PROBLEM TO BE SOLVED: To make it possible to analyze the particle diameter, the number of particles, components and like quannitatively by classifying the particles charged with a charging device, and measuring the components and the quantities for every classified particle. SOLUTION: The fine grains such as particles, clusters, mist and the like floating in an atmospheric space are withdrawn with a sampling device 1. The individual particle is changed by a radiation such as the corona discharge or americium isotope ( Am) and the like with a charging device 2. Then one charged particles are classified for every particle diameter in accordance with the electric mobility by a differentialtype electric-mobility classifier(DME) 3. Then, the components and the amounts are measured for every particle classified by a high-frequency conduction-coupling plasma mass spectrometer (ICP-MS) 4. The number of the particles is measured in a Faraday-cup ammeter (FCE) 5.

6. 发明专利

JPH10288600A DIFFERENTIAL TYPE ELECTRIC MOBILITY MEASURING UNIT 失效
公开(公告)号：JPH10288600A
公开(公告)日：1998-10-27
申请号：JP9905897
申请日：1997-04-16
申请人： RIKAGAKU KENKYUSHO
发明人： TAKEUCHI KAZUO , OKUYAMA KIKUO
IPC分类号： G01N27/62 , G01N15/02
摘要： PROBLEM TO BE SOLVED: To provide a differential electric mobility measuring unit capable of easily measuring the grain size of fine grains distributed in a wide range at a low cost. SOLUTION: This differential electric mobility measuring unit 1 is provided with a base section 4, an envelope body 6 movably connected to the base section via an expansion body 5, and a central rod 7 connected to the base section 4 and extended toward the inside of the envelope body 6. The envelope body 6 has one slit 8 for drawing charged fine grains to the inside, and the central rod 7 has the other slit 9 for extracting the charged fine grains drawn from one slit 8 to the outside. The envelope body 6 and central rod 7 are made of a conductor, a variable-voltage source 12 is connected to the central rod 7, and the envelope body 6 is grounded. The base section 4 and envelope body 6 are movably connected, and the distance between one slit 8 and the other slit 9 can be changed while the inside of the envelope body 6 is maintained at the sealed state by the expansion body 5.

7. 发明专利

JPH11264790A DIFFERENTIAL TYPE MEASURING DEVICE FOR DEGREE OF ELECTRICAL MOVEMENT 失效
公开(公告)号：JPH11264790A
公开(公告)日：1999-09-28
申请号：JP6742198
申请日：1998-03-17
申请人： RIKAGAKU KENKYUSHO
发明人： TAKEUCHI KAZUO , ISOMURA SHOHEI , HIRASAWA SEIICHI , OKUYAMA KIKUO
IPC分类号： G01N27/60 , G01N15/02
摘要： PROBLEM TO BE SOLVED: To provide a differential type measuring device for the degree of electrical movement, whereby it is possible to accurately measure the size of particulate under the low pressure condition. SOLUTION: Charged particles drawn in from one slit 4 move downward along the center axis together with a sheath gas supplied from a discharge hole 7 in an enclosure 2, and each particulate is drawn toward a center rod 3 from the side with the enclosure 2 at a speed complying with the degree of electrical movement upon being influenced by the electric field generated by a voltage V impressed by a variable voltage source 10 between the inside circumferential surface of the enclosure 2 and the peripheral surface of the center rod 3. Only those particulates having specified size are taken out, which have advanced for the distance L in drawing the specified locus and reached the other slit 5 in the center rod 3. The sheath gas supplied from a draw-in hole 7 in the enclosure 2 is exhausted from the discharge hole 9 in the enclosure 2 upon passing through the slit 5, but because an orifice 11 is provided in the downstream of the slit 5, the sheath gas is hindered from flowing, and a pressure difference is generated between in front of and behind the orifice 11.

8. 发明专利

JPH0760110A METHOD FOR CONTROLLING SUPERFINE PARTICLE SIZE 失效
公开(公告)号：JPH0760110A
公开(公告)日：1995-03-07
申请号：JP22813793
申请日：1993-08-20
申请人： RIKAGAKU KENKYUSHO
发明人： KUGA YOSHIHISA , TAKEUCHI KAZUO , ISOMURA SHOHEI , OKUYAMA KIKUO
IPC分类号： B01D59/34 , B01J19/00 , B01J19/08
摘要： PURPOSE:To produce a large particle obtained by aggregating and chaining primary particles by chaining primary particles formed by condensing a molecule in a substance forming a nucleus when ionized by aggregation to form a secondary particle and increasing a size of a produced superfine particle. CONSTITUTION:The electron of UF5 molecule is separated by the irradiation with a light source 12 provided to a laser isotope separator 10, hence the UF5 molecule is ionized, and a stable nucleus is immediately generated. The nucleus thus ionized polarizes the surrounding UF5 molecule as it is excited by the light source 12, the surrounding UF5 molecule is rapidly condensed by an electric force to form a large-sized primary particle, both poles of the primary particle are charged with the irradiation of the light source 12 even after the primary particle is formed, the aggregation of the primary particles is promoted, and a large-sized chained UF5 particle is obtained.

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