WO2009157057A1 - 紫外線吸光度測定装置 - Google Patents
紫外線吸光度測定装置 Download PDFInfo
- Publication number
- WO2009157057A1 WO2009157057A1 PCT/JP2008/061459 JP2008061459W WO2009157057A1 WO 2009157057 A1 WO2009157057 A1 WO 2009157057A1 JP 2008061459 W JP2008061459 W JP 2008061459W WO 2009157057 A1 WO2009157057 A1 WO 2009157057A1
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- WO
- WIPO (PCT)
- Prior art keywords
- measurement
- flow cell
- sample water
- control unit
- pure water
- Prior art date
Links
- 238000002835 absorbance Methods 0.000 title claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 103
- 238000004140 cleaning Methods 0.000 claims abstract description 28
- 238000011481 absorbance measurement Methods 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims description 81
- 238000005406 washing Methods 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 abstract 7
- 229910021641 deionized water Inorganic materials 0.000 abstract 7
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 abstract 5
- 210000004027 cell Anatomy 0.000 description 57
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/05—Flow-through cuvettes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1893—Water using flow cells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
- G01N2021/152—Scraping; Brushing; Moving band
Definitions
- the present invention relates to an ultraviolet absorbance measuring apparatus for measuring the amount (concentration) of organic pollutants present in sample water.
- an ultraviolet absorbance measuring device that measures the amount of organic pollutants in sample water using ultraviolet absorbance is often used.
- the ultraviolet absorbance measurement apparatus quantifies organic substances contained in sample water by irradiating the flow cell in which the sample water is passed with ultraviolet rays and measuring the absorbance.
- the conventional UV absorbance measurement device is based on the premise that the sample water is continuously supplied to the flow cell for measurement, and the intermittent measurement is such that the supply of the sample water to the flow cell is stopped and then the measurement is restarted. Is not assumed. Therefore, in the conventional apparatus, the measurement is performed as it is even after the supply of the sample water to the flow cell is stopped.
- the sample water in the flow cell does not circulate, so that the sample water easily adheres to the wall surface of the flow cell, and after that time, the stain cannot be removed by washing. Sometimes. In addition, when the supply of sample water is stopped and all the sample water is discharged to make the flow cell empty, dirt attached to the wall surface of the flow cell may be dried and cannot be removed.
- the present invention aims to prevent the wall surface of the flow cell from being contaminated by sample water even when the UV absorbance measurement is interrupted.
- the ultraviolet absorbance measurement apparatus of the present invention includes a flow cell, a sample water / pure water supply unit that is connected to the flow cell and can selectively supply either sample water or pure water to the flow cell, and a flow cell.
- a drainage control unit for controlling the drainage of the water, a light source for irradiating the flow cell with ultraviolet light, and a photodetector for detecting the ultraviolet light that has passed through the flow cell.
- Measurement unit that measures the UV absorbance of water
- a cleaning mechanism that cleans the inside of the flow cell, sample water is circulated in the flow cell at the time of measurement, and the sample water is stopped after measurement and the flow cell is cleaned by the cleaning mechanism
- a control unit that controls the operation of the sample water / pure water supply unit, drainage control unit, light source, measurement calculation unit, and cleaning mechanism, including the operation of filling the flow cell with pure water.
- the control unit also performs an operation of cleaning the flow cell at the start of measurement. If it does so, the stain
- the control unit sets the set time set in the measurement time setting unit. Based on this, the operation of the sample water / pure water supply unit, drainage control unit, light source, measurement calculation unit, and cleaning mechanism is controlled.
- time related to measurement refers to the start time and end time of measurement. If operation control by the control unit is performed based on these set times, the measurer simply sets the time of each operation in the measurement time setting unit, and the device automatically follows the set time. Since the operation is performed, it is not necessary for the measurer to instruct the apparatus to start, end, or restart the measurement at the measurement site.
- the ultraviolet absorbance measurement apparatus of the present invention includes a flow cell, a sample water / pure water supply unit, a drainage control unit, a light source, a measurement calculation unit, a cleaning mechanism, and a control unit. Since the flow cell is cleaned by the cleaning mechanism and the flow cell is filled with pure water, the flow cell is not contaminated with sample water during measurement interruption, and measurement can be interrupted. The measurement after resumption can be performed with high accuracy.
- FIG. 1 is a block diagram schematically showing an embodiment of an ultraviolet absorbance measuring apparatus.
- An ultraviolet light source 4 is arranged on the side of the flow cell 2 so as to irradiate the flow cell 2 through which sample water is circulated, and the ultraviolet light that has passed through the flow cell 2 is detected on the opposite side of the light source 4 across the flow cell 2.
- a light measuring unit 6 is provided that includes a light detector 8 and a calculation unit 10 that obtains the ultraviolet absorbance of a sample flowing in the flow cell 2 based on the detection amount of the light detector 8.
- the sample water / pure water supply unit 14 is connected to the inlet 12 of the flow cell 2.
- the sample water / pure water supply unit 14 has a structure in which a sample water supply channel 18 for supplying sample water and a pure water supply channel 20 for supplying pure water are connected to the inlet 12 via a channel switching valve 16.
- the pure water supplied from the pure water supply channel 20 is tap water that has passed through the activated carbon filter 22.
- the pure water is once stored in the pure water tank 24 and pumped up from the pure water tank 24 by the pump 26.
- either sample water or pure water can be supplied to the inlet 12 side.
- both supply can be stopped by stopping the pump 26 in the state which made the flow-path switching valve 16 into the pure water side.
- the outlet of the flow cell 2 is configured to be opened and closed by a drainage control unit 28 including an on-off valve.
- a cleaning mechanism 30 for cleaning the inside of the flow cell 2 is provided.
- the cleaning mechanism 30 includes a wiper 30 a and a moving mechanism 30 c that is driven by a motor 30 b to move the wiper 30 a, and moves the wiper 30 a up and down while contacting the wall surface of the flow cell 2.
- the dirt on the wall surface of the flow cell 2 is physically removed by moving in the direction.
- the moving mechanism 30c includes a bar screw that is rotated by the motor 30b, and a drive unit that is screwed with the bar screw and moves in the axial direction of the bar screw when the bar screw rotates.
- the base end portion of the wiper 30a is fixed to a drive unit that moves on a bar screw.
- the cleaning mechanism 30 may further have a function of supplying a cleaning liquid to the flow cell 2.
- the operations of the light source 4, the light measurement unit 6, the sample water / pure water supply unit 14, the drainage control unit 28, and the cleaning mechanism 30 are controlled by the control unit 32.
- the control unit 32 performs control based on an instruction from the measurer input via the operation input unit 34.
- a time related to measurement is set in the measurement time setting unit 36 including a timer, the setting is performed. It is configured to perform specific control when it is time.
- the measurement time is, for example, a measurement start time or a measurement end time.
- FIG. 2 is a flowchart showing an example of the operation of the ultraviolet absorbance measuring apparatus of this embodiment.
- the operation of the apparatus of this embodiment will be described with reference to FIG.
- the measurer can instruct the control unit 32 to start measurement via the operation input unit 34, or can set the measurement time setting unit 36 with respect to measurement such as measurement start time and measurement end time (step S1). .
- the measurement time setting unit 36 transmits a signal to the control unit 32 when the measurement start time is reached, and the control unit 32 receives the signal and controls the measurement operation (step S2). If the measurement start time is not set, the measurement unit inputs a measurement start instruction via the operation input unit 34, and the control unit controls the measurement operation (step S3).
- the flow cell 2 before the start of measurement is in a state filled with pure water by the operation of step S12 described later.
- step S2 When the measurement start time is reached (step S2) or the measurement start instruction is input from the measurer (step S3), the inside of the flow cell 2 filled with pure water is cleaned by the cleaning mechanism 30 (step S4). Thereafter, the outlet of the flow cell 2 is opened, pure water is discharged from the flow cell 2, sample water is supplied from the sample water / pure water supply mechanism 14 (step S6), and measurement of ultraviolet absorbance is started (step S7).
- the measurement is started, the flow cell 2 is irradiated with ultraviolet rays from the light source 4, and the ultraviolet rays that have passed through the flow cell 2 are received by the photodetector 8.
- the photodetector 8 transmits a signal corresponding to the amount of received ultraviolet light to the calculation unit 10, and the calculation unit 10 calculates the ultraviolet absorbance of the sample water in the flow cell 2 based on the signal.
- step S8 and S9 When the measurement end time is set in the measurement time setting unit 36, measurement is performed up to that time, and when the measurement time is reached, the measurement time setting unit 36 transmits a signal to the control unit 32, and the control unit 32 In response to the signal, operation control for ending the measurement is performed (steps S8 and S9).
- the measurement end time is not set in the measurement time setting unit 36, measurement is performed until the measurer inputs a measurement end instruction, and when the measurement end instruction is input by the measurer, the control unit 32 Operation control for the end of measurement is performed (steps S8 and S10).
- the UV absorbance measurement is interrupted by the control unit 32.
- the control unit 32 discharges all the sample water in the flow cell 2. Thereafter, pure water is supplied from the sample water / pure water supply unit 14, the inside of the flow cell 2 is cleaned by the cleaning mechanism 30 (step S 11), and the outlet of the flow cell 2 is closed by the drainage control unit 28. Is filled with pure water (step S12), and the pump 26 is stopped. Thereafter, the flow cell 2 is kept filled with pure water while the measurement is interrupted.
- the flow cell 2 is filled with pure water during the measurement interruption from the end of the ultraviolet absorbance measurement to the start of the next measurement. It is possible to prevent problems such as contamination of the inside by sample water or removal of dirt by drying.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
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- Optical Measuring Cells (AREA)
Abstract
Description
4 光源
6 光測定部
8 光検出器
10 演算部
12 フローセル入口
14 試料水・純水供給部
16 流路切替バルブ
18 試料水供給流路
20 純水供給流路
22 活性炭フィルタ
24 純水タンク
26 ポンプ
28 排水制御部
30 洗浄機構
30a ワイパー
30b モータ
30c 移動機構
32 制御部
34 操作入力部
36 測定時間設定部
試料水を流通させるフローセル2に対して紫外線を照射するように紫外光源4がフローセル2の側方に配置されており、フローセル2を挟んで光源4の反対側にフローセル2を通過した紫外線を検出する光検出器8及び光検出器8の検出量に基づいてフローセル2内を流通する試料の紫外線吸光度を求める演算部10からなる光測定部6が配置されている。
また、フローセル2内を洗浄するための洗浄機構30が設けられている。洗浄機構30は、例えば、図3に示されているように、ワイパー30aと、モータ30bによって駆動されてワイパー30aを移動させる移動機構30cを備え、ワイパー30aをフローセル2の壁面に接触させながら上下方向に移動させることによってフローセル2の壁面の汚れを物理的に落とすものである。移動機構30cとしては、モータ30bによって回転される棒ネジと、棒ネジと螺合し、棒ネジが回転することにより棒ネジの軸方向に移動する駆動部とを備えたものである。ワイパー30aの基端部は棒ネジ上を移動する駆動部に固定されている。洗浄機構30はさらに洗浄液をフローセル2に供給する機能も備えていてもよい。
測定者は操作入力部34を介して制御部32に測定開始を指示するか、測定開始時間や測定終了時間といった測定に関する時間を測定時間設定部36に設定しておくことができる(ステップS1)。測定開始時間が設定されている場合、測定時間設定部36は測定開始時間になると制御部32に信号を送信し、制御部32はその信号を受けて測定動作の制御を行なう(ステップS2)。測定開始時間が設定されていない場合には、測定者が操作入力部34を介して測定開始の指示を入力することによって制御部が測定動作の制御を行なう(ステップS3)。なお、この測定開始前の時点のフローセル2内は、後述するステップS12の動作により、純水で満たされた状態となっている。
Claims (3)
- フローセルと、
前記フローセルに接続され前記フローセルに試料水及び純水のいずれか一方を切り替えて供給することができる試料水・純水供給部と、
前記フローセルからの排水を制御する排水制御部と、
前記フローセルに対して紫外線を照射するための光源と、
前記フローセルを透過した紫外線を検出する光検出器を含んで、前記光検出器の光検出量に基づいて試料水の紫外線吸光度を測定する測定演算部と、
前記フローセル内を洗浄する洗浄機構と、
測定時は前記フローセル内で試料水を流通させ、測定終了後は前記試料水の供給を停止してフローセルを前記洗浄機構で洗浄するとともにフローセル内を純水で満たす動作を含んで、前記試料水・純水供給部、排水制御部、光源、測定演算部及び洗浄機構の動作を制御する制御部と、を備えた紫外線吸光度測定装置。 - 前記制御部は、測定開始時に前記洗浄機構によるフローセル内の洗浄を行なう動作の行なう請求項1に記載の紫外線吸光度測定装置。
- 測定時間に関する情報を入力して測定に関する時間を設定することができる測定時間設定部をさらに備え、
前記制御部は、前記測定時間設定部に設定されている測定に関する設定時間に基づいて前記試料水・純水供給部、排水制御部、光源、測定演算部及び洗浄機構の動作を制御する請求項1又は2に記載の紫外線吸光度測定装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010517614A JP5013000B2 (ja) | 2008-06-24 | 2008-06-24 | 紫外線吸光度測定装置 |
CN2008801280055A CN101971005B (zh) | 2008-06-24 | 2008-06-24 | 紫外线吸光度测定装置 |
PCT/JP2008/061459 WO2009157057A1 (ja) | 2008-06-24 | 2008-06-24 | 紫外線吸光度測定装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2008/061459 WO2009157057A1 (ja) | 2008-06-24 | 2008-06-24 | 紫外線吸光度測定装置 |
Publications (1)
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WO2009157057A1 true WO2009157057A1 (ja) | 2009-12-30 |
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PCT/JP2008/061459 WO2009157057A1 (ja) | 2008-06-24 | 2008-06-24 | 紫外線吸光度測定装置 |
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JP (1) | JP5013000B2 (ja) |
CN (1) | CN101971005B (ja) |
WO (1) | WO2009157057A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015017901A (ja) * | 2013-07-11 | 2015-01-29 | 栗田工業株式会社 | 水質測定装置 |
US9683927B2 (en) | 2011-12-02 | 2017-06-20 | Biochrom Limited | Device for receiving small volume liquid samples |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103398966A (zh) * | 2013-08-20 | 2013-11-20 | 杭州北斗星膜制品有限公司 | 光谱仪在有机溶液中测定tmc浓度的方法 |
US20220137403A1 (en) * | 2019-02-15 | 2022-05-05 | Kemira Oyj | Method and arrangement for cleaning a sensor |
MX2021015046A (es) * | 2019-06-07 | 2022-01-18 | Hach Co | Dispositivos y sistemas de limpieza y calibracion de sensor. |
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JPH0412250A (ja) * | 1990-04-28 | 1992-01-16 | Tsurumi Seiki:Kk | 水のcod測定装置 |
JPH0915144A (ja) * | 1995-07-03 | 1997-01-17 | Toa Denpa Kogyo Kk | 吸光光度計およびこの吸光光度計の温度補償方法 |
JPH10206328A (ja) * | 1997-01-24 | 1998-08-07 | Suido Kiko Kaisha Ltd | 水質計 |
JPH10206415A (ja) * | 1997-01-17 | 1998-08-07 | Mitsubishi Heavy Ind Ltd | ボイラ燃料等に使用する黒液の発熱量自動測定方法と該測定方法を利用したボイラの駆動制御方法 |
JP2003305454A (ja) * | 2003-02-17 | 2003-10-28 | Meidensha Corp | 取水水質管理装置 |
JP2006153738A (ja) * | 2004-11-30 | 2006-06-15 | Dkk Toa Corp | 積分球式濁度計 |
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US4165179A (en) * | 1976-08-19 | 1979-08-21 | Nippon Precision Optical Instrument Co., Ltd. | Device for wiping optical window in turbidimeter or similar optical instrument for examining liquid sample |
CN1967215A (zh) * | 2006-11-08 | 2007-05-23 | 浙江大学 | 紫外扫描式多光谱水质cod快速检测方法及其装置 |
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2008
- 2008-06-24 WO PCT/JP2008/061459 patent/WO2009157057A1/ja active Application Filing
- 2008-06-24 CN CN2008801280055A patent/CN101971005B/zh active Active
- 2008-06-24 JP JP2010517614A patent/JP5013000B2/ja active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0412250A (ja) * | 1990-04-28 | 1992-01-16 | Tsurumi Seiki:Kk | 水のcod測定装置 |
JPH0915144A (ja) * | 1995-07-03 | 1997-01-17 | Toa Denpa Kogyo Kk | 吸光光度計およびこの吸光光度計の温度補償方法 |
JPH10206415A (ja) * | 1997-01-17 | 1998-08-07 | Mitsubishi Heavy Ind Ltd | ボイラ燃料等に使用する黒液の発熱量自動測定方法と該測定方法を利用したボイラの駆動制御方法 |
JPH10206328A (ja) * | 1997-01-24 | 1998-08-07 | Suido Kiko Kaisha Ltd | 水質計 |
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JP2006153738A (ja) * | 2004-11-30 | 2006-06-15 | Dkk Toa Corp | 積分球式濁度計 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US9683927B2 (en) | 2011-12-02 | 2017-06-20 | Biochrom Limited | Device for receiving small volume liquid samples |
JP2015017901A (ja) * | 2013-07-11 | 2015-01-29 | 栗田工業株式会社 | 水質測定装置 |
Also Published As
Publication number | Publication date |
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CN101971005A (zh) | 2011-02-09 |
JPWO2009157057A1 (ja) | 2011-12-01 |
JP5013000B2 (ja) | 2012-08-29 |
CN101971005B (zh) | 2013-11-20 |
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