JP6954387B2 - 水中のでんぷん濃度の連続測定方法および装置 - Google Patents
水中のでんぷん濃度の連続測定方法および装置 Download PDFInfo
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- JP6954387B2 JP6954387B2 JP2020023612A JP2020023612A JP6954387B2 JP 6954387 B2 JP6954387 B2 JP 6954387B2 JP 2020023612 A JP2020023612 A JP 2020023612A JP 2020023612 A JP2020023612 A JP 2020023612A JP 6954387 B2 JP6954387 B2 JP 6954387B2
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/02—Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control
- D21H21/04—Slime-control agents
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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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/05—Flow-through cuvettes
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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
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
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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
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
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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
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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Description
(1) 測定毎にヨウ素液を希釈し試薬を調合することの手間の省略
(2) 希釈によるヨウ素液の易分解性による計測値変動の解消
(3) 過酸化水素によりヨウ化カリウム溶液からヨウ素を遊離させる測定法における検水中の還元物質、有機物による測定誤差の解消
(4) ヨウ素液試薬の刺激性の解消
(5) ポビドンヨードの安全性と汎用性ならびに、易溶解性による試薬製造時間・コストの改善
(6) 製造現場における水中でんぷんの連続自動測定・モニタリング装置の実現
(7) 従来人の手で行っていた水中でんぷんの分析を、連続的に自動で測定することが可能となる。
(8) 5分毎程度の間隔で無人で自動測定を行い、測定値は遠隔モニタリングで即時に監視することができ、かつ測定値に応じて警報の発報や自動でスライムコントロール剤、COD低下剤を投入することが可能で水中のでんぷん濃度を容易に自動管理することが可能になる。
(9) 水中でんぷん濃度のリアルタイム測定・監視および濃度管理による省力化、自動化が可能になる
(10) 水中の過剰でんぷん低減による製紙製造工程での操業性改善、製品品質向上
(11) 排水処理分野における水質汚濁リスクの低減、環境負荷低減、富栄養化防止
なお、3.5%塩酸(試薬A)とN/500 ヨウ素液(試薬B)とを用い、検水に該試薬A,Bを添加し3分後に比色測定する従来法(ヨウ素液希釈法)では、測定時間は1検体当り約5分であり、事前試薬調成時間は10分である。
本実施例で用いた検水は、あらかじめアルカリ性で加熱溶解させた濃度1%の生でんぷん溶液を純水で希釈し、でんぷん濃度0mg/L,50mg/L,100mg/L,200mg/L,300mg/Lの標準希釈系列としたものである。
検水を3.2mLとし、3.5%塩酸を4.4mL添加し、N/500ヨウ素液を0.4mL添加したこと以外は実施例1と同様にして、でんぷん濃度を測定した。結果を図3に示す。
[実施例2,3:図1,2の連続測定装置による測定]
実施例2では、検水として、純水に上記1%の生でんぷん溶液を添加したでんぷん濃度0mg/L,50mg/L,100mg/L,200mg/L,300mg/Lの各検水を用いた。
上記実施例1は、第二試薬をポビドンヨードに変更したこと以外は、従来のヨウ素液を試薬とした試験法に準じるものである。
3 カラーセンサ
Claims (4)
- 現場設置型の連続測定装置によって水中のでんぷん濃度を連続測定する方法であって、検水にポビドンヨードを添加し、次いで吸光度を測定し、測定された吸光度に基づいて検水中のでんぷん濃度を測定する、水中のでんぷん濃度の連続測定方法。
- 検水が導入されるセルと、
該セル内に、又は該セルに導入される検水にポビドンヨード水溶液を供給する手段と、
該セル内の液の吸光度を測定する手段と
を有する現場設置型の水中のでんぷん濃度の連続測定装置。 - 前記セルの一部が透明部となっており、前記吸光度の測定手段が該透明部の外側に配置されている請求項2の現場設置型の水中のでんぷん濃度の連続測定装置。
- 請求項1の水中のでんぷん濃度の連続測定方法によって求めた検水中のでんぷん濃度に基づいて、該検水を採取した水系に対し、スライムコントロール剤又はCOD低下薬を添加する水系への薬注制御方法。
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JP2020023612A JP6954387B2 (ja) | 2020-02-14 | 2020-02-14 | 水中のでんぷん濃度の連続測定方法および装置 |
CN202080060929.7A CN114303052A (zh) | 2020-02-14 | 2020-09-01 | 水中淀粉浓度的测定方法和装置 |
PCT/JP2020/033091 WO2021161564A1 (ja) | 2020-02-14 | 2020-09-01 | 水中のでんぷん濃度の測定方法および装置 |
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JP2000140858A (ja) * | 1998-11-12 | 2000-05-23 | Kurita Water Ind Ltd | スライム抑制方法、添加剤及び冷却水循環装置 |
JP5262566B2 (ja) * | 2008-10-21 | 2013-08-14 | 栗田工業株式会社 | 紙の製造方法 |
JP5811523B2 (ja) * | 2010-09-29 | 2015-11-11 | 栗田工業株式会社 | 紙の製造方法 |
CN105378178B (zh) * | 2013-07-09 | 2017-07-11 | 栗田工业株式会社 | 腐浆抑制方法 |
FI20165270A (fi) * | 2016-03-31 | 2017-10-01 | Kemira Oyj | Menetelmä ja järjestelmä tärkin määrittämiseksi näytteestä |
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US20190360922A1 (en) * | 2018-05-22 | 2019-11-28 | Buckman Laboratories | Determination of starch in a sample at an industrial facility |
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