JP6248098B2 - 溶液中の物質の吸光度を測定する方法並びに装置 - Google Patents
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- 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
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- 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
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
- G01N21/3151—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths using two sources of radiation of different wavelengths
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/62—Detectors specially adapted therefor
- G01N30/74—Optical detectors
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- 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
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
- G01N2021/3181—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths using LEDs
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
- G01N2030/8809—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample
- G01N2030/8813—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample biological materials
- G01N2030/8827—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample biological materials involving nucleic acids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/062—LED's
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Description
Aは吸光度であり、
Eは、Lmol-1cm-1の単位でのモル吸光係数であり、
bは、cmで定義される標本の光路長であり、
cは、mol-1で表される溶液中の化合物の濃度である。
i)第一の波長を有し第一のLED光源から出力される光を伝達するステップと、ii)LEDから出力される光を溶液中の物質を通過するように導くステップと、iii)溶液中の物質の濃度の指標を与えるために溶液から伝播する光の強度を定量化するステップとを備えており、当該方法は、ステップi)からステップiii)が第一の波長とは異なる第二の波長の出力を有する第二のLED光源を用いて繰り返されることを特徴とする方法が提供される。
20、120、220、320:発光ダイオード構成
21:カルーセル
22:バンドパスフィルタ
23:平歯車対
24、124、224:ビームスプリッタ
24:ステッピングモータ
25、125、225、325:制御器
26、28:UVLED
30、130、230、330、331:フローセル
32:入口
34、134、234:出口
36、38、136、138、236、238:窓
40、140、240、340、341:検出用光検出器
42、142、242、342:参照用光検出器
70、270:コリメート用レンズ
126、127、128、226、227、228、326、327、328:LED
156、157、158、356、357、358:光学的結合(光ファイバ)
166、167、168、266、267、268、366、367、368:バンドパスフィルタ
290:可動反射面
370:バンドル
372:受光用光ファイババンドル
Claims (19)
- 溶液中の物質の吸光度を測定する方法であって、
i)第一の波長を有し第一の発光ダイオード(LED)光源から出力される光を伝達するステップと、
ii)LEDから出力される光を溶液中の物質を通るように導くステップと、
iii)溶液中の物質の濃度の指標を得るために溶液から伝播する光の強度を定量化するステップと、
iv)定量化した光の強度から物質の吸光度を求めるステップと、
v)吸光度の変化が閾値に達する時点を決定するステップと、
vi)閾値に達した吸光度の変化に応じて、第一の波長とは異なる第二の波長の出力を有する第二のLED光源を用いてステップi)〜iii)を繰り返すステップと
を含む方法。 - 第一のLED光源から伝播する光が、第一の波長に対応する第一のバンドパスフィルタを通るように導かれ、第二のLED光源からの光が、第二の波長に対応する第二のバンドパスフィルタを通るように導かれる、請求項1記載の方法。
- 第一及び第二のLED光源からの光を、ビームスプリッタを通して伝播させて該ビームスプリッタからの光の第一の部分を基準検出器へ向けて導くとともに光の第二の部分を溶液の内部に導き、ステップiii)が、さらに、基準検出器で光の第一の部分の強度を定量化して参照値を得るステップと、溶液を透過した後の光の第二の部分の強度を定量化して標本値を得るステップと、標本値及び参照値から溶液の吸光度(A)を算出するステップとを含んでいる、請求項1又は請求項2記載の方法。
- 第一及び/又は第二のLEDが紫外(UV)LEDである、請求項1乃至請求項3のいずれか1項記載の方法。
- 溶液が、細胞抽出物、細胞溶解物、細胞培養物及びこれらの混合物からなる群から選択される、請求項1乃至請求項3のいずれか1項記載の方法。
- 物質が、タンパク質若しくはペプチド、又は核酸である、請求項1乃至請求項5のいずれか1項記載の方法。
- 第一の波長でのステップi)〜iv)とその後の第二の波長でのステップi)〜iii)をすべて循環的にさらに繰り返す、請求項1乃至請求項6のいずれか1項記載の方法。
- 各ステップの循環的な繰り返しが所定の時間尺度に従って行なわれる、請求項7記載の方法。
- 溶液中の物質の吸光度を測定する装置であって、
a)既知の路長を有し溶液を収容するための少なくとも1個の標本セルであって、所定の波長スペクトルの光に対して少なくとも部分的に透明な標本セルと、
b)各々異なる波長の光を出力し、光路に沿って所定の波長スペクトルの範囲内で光を放出する少なくとも第一及び第二の発光ダイオード(LED)光源を含むLED光源構成と、
c)以下のステップi)〜vi):
i)第一のLED光源から出力される光を伝達するステップと、
ii)LEDから出力される光を溶液中の物質を通るように導くステップと、
iii)溶液中の物質の濃度の指標を得るために溶液から伝播する光の強度を定量化するステップと、
iv)定量化した光の強度から物質の吸光度を求めるステップと、
v)吸光度の変化が閾値に達する時点を決定するステップと、
vi)閾値に達した吸光度の変化に応じて、第二のLED光源を用いてステップi)〜iii)を繰り返すステップと
を実行するようにプログラムされた制御器と
を備える装置。 - 光路に設けられたバンドパスフィルタをさらに含んでいる、請求項9記載の装置。
- iv)経路に沿って伝播する光源からの光を、第一の部分及び第二の部分に分割するビームスプリッタであって、第一の部分を基準検出器へ向けて導くことができ、第二の部分をセルの内部に導くことができる、ビームスプリッタと、
v)該ビームスプリッタにより導かれる光の第一の部分の強度を検出する基準検出器と、
vi)セルから伝播する第二の部分の強度を検出する標本検出器と
をさらに含んでいる、請求項9又は請求項10記載の装置。 - LEDの少なくとも1つが紫外(UV)LEDである、請求項9乃至請求項11のいずれか1項記載の装置。
- LED光源構成が、複数のLEDを支持する可動LED支持体であって、LEDの各々の光路の内外への移動を可能にする可動LED支持体をさらに含んでいる、請求項9乃至請求項12のいずれか1項記載の装置。
- 支持体が、各々のLEDを支持する回転式カルーセルであって、当該カルーセルの回転により各々のLEDを順次光路に向ける回転式カルーセルを含んでいる、請求項13記載の装置。
- 支持体が、光路に沿ってUV光を与えるために、線形運動により各々のLEDを順次光路に向けるアレイを含んでいる、請求項13記載の装置。
- LED光源構成が、複数の光源の各々の選択された一つの光源と光路との間に光学的整列を与える可動反射面を含んでいる、請求項9記載の装置。
- LED光源構成が、各々のLEDに付設された光ファイバ、又は単一の光ファイバをさらに含んでおり、いずれの場合も該光ファイバが各々のLEDからの光を光路に伝播させる光学的経路を与えるように構成されている、請求項9乃至請求項16のいずれか1項記載の装置。
- 各々のフィルタが、当該各々のフィルタを光路の内部に移動させる可動式の支持体に装着されている、請求項16記載の装置。
- 各々異なる光路を有する2個以上の標本セルをさらに含んでおり、各々の光路には関連するLEDからの光を供給することができ、各々の関連するLEDはそれぞれの標本セルに異なる波長の光を与える、請求項9記載の装置。
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GBGB1209738.2A GB201209738D0 (en) | 2012-05-31 | 2012-05-31 | Methods and apparatus for measuring the concentration of a substance in a solution |
GB1209738.2 | 2012-05-31 | ||
PCT/EP2013/061212 WO2013178770A1 (en) | 2012-05-31 | 2013-05-30 | Methods and apparatus for measuring the light absorbance of a substance in a solution |
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US9562860B1 (en) | 2013-06-19 | 2017-02-07 | Theranos, Inc. | Methods and devices for sample analysis |
US9568458B2 (en) * | 2014-08-21 | 2017-02-14 | Sharp Kabushiki Kaisha | Optical sensor for fluid analysis |
US10274428B2 (en) * | 2014-11-25 | 2019-04-30 | Ge Healthcare Bio-Sciences Ab | Intergration of fluorescence detection capability into light absorbance measurement apparatus |
JP6413759B2 (ja) * | 2014-12-25 | 2018-10-31 | 株式会社島津製作所 | 光学分析装置 |
GB201603051D0 (en) * | 2016-02-23 | 2016-04-06 | Ge Healthcare Bio Sciences Ab | A method and a measuring device for measuring the absorbance of a substance in at least one solution |
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