DE19858027A1 - Quantitative determination of peroxy compounds, especially hydrogen peroxide, in concentrated aqueous solutions comprises near-infrared absorption spectrometry - Google Patents
Quantitative determination of peroxy compounds, especially hydrogen peroxide, in concentrated aqueous solutions comprises near-infrared absorption spectrometryInfo
- Publication number
- DE19858027A1 DE19858027A1 DE19858027A DE19858027A DE19858027A1 DE 19858027 A1 DE19858027 A1 DE 19858027A1 DE 19858027 A DE19858027 A DE 19858027A DE 19858027 A DE19858027 A DE 19858027A DE 19858027 A1 DE19858027 A1 DE 19858027A1
- Authority
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- Germany
- Prior art keywords
- concentration
- nir
- determination
- aqueous solutions
- hydrogen peroxide
- Prior art date
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- Granted
Links
- 239000007864 aqueous solution Substances 0.000 title claims abstract description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 title claims description 8
- 125000000864 peroxy group Chemical group O(O*)* 0.000 title abstract description 3
- 238000001320 near-infrared absorption spectroscopy Methods 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000000862 absorption spectrum Methods 0.000 claims abstract description 6
- 150000001875 compounds Chemical class 0.000 claims description 13
- 238000002835 absorbance Methods 0.000 claims description 10
- 238000004061 bleaching Methods 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000003908 quality control method Methods 0.000 claims description 2
- 239000012898 sample dilution Substances 0.000 claims description 2
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000004497 NIR spectroscopy Methods 0.000 description 5
- 239000004094 surface-active agent Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004566 IR spectroscopy Methods 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000009102 absorption Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- -1 perborate Chemical compound 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004435 Oxo alcohol Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000004082 amperometric method Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000012569 chemometric method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012854 evaluation process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000004401 flow injection analysis Methods 0.000 description 1
- CATMPQFFVNKDEY-AAEUAGOBSA-N gamma-Glu-Trp Chemical compound C1=CC=C2C(C[C@H](NC(=O)CC[C@H](N)C(O)=O)C(O)=O)=CNC2=C1 CATMPQFFVNKDEY-AAEUAGOBSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 238000003969 polarography Methods 0.000 description 1
- 238000004313 potentiometry Methods 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- MWNQXXOSWHCCOZ-UHFFFAOYSA-L sodium;oxido carbonate Chemical compound [Na+].[O-]OC([O-])=O MWNQXXOSWHCCOZ-UHFFFAOYSA-L 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- JSPLKZUTYZBBKA-UHFFFAOYSA-N trioxidane Chemical compound OOO JSPLKZUTYZBBKA-UHFFFAOYSA-N 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
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
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/359—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared 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
- G01N21/17—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
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3577—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing liquids, e.g. polluted water
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- 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)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur quantitativen Bestim mung von anorganischen und organischen Peroxoverbindungen nach dem Oberbegriff des Anspruchs 1.The invention relates to a method for quantitative determination of inorganic and organic peroxo compounds the preamble of claim 1.
Derartige Peroxoverbindungen werden u. a. zum Bleichen, Entfärben und Desinfizieren eingesetzt. Die Konzentration von organischen und anorganischen Peroxoverbindungen, wie z. B. Peressigsäure, Wasserstoffperoxid, Perborat, Percarbonat, Persulfat in wäßrigen Lösungen wird entweder elektrochemisch (Potentiometrie, Ampero metrie, Polarographie), titrimetrisch (Jodometrie, Manganome trie, Cerimetrie) oder spektroskopisch (UV/VIS über Farbreaktio nen, Infrarot-Spektroskopie) ermittelt. Die on-line Messung von Peroxokonzentrationen, z. B. von Peressigsäure, erfolgt. UV/VIS- spektroskopisch mittels Fließinjektionsanalyse über eine Farbre aktion.Such peroxo compounds are u. a. for bleaching, bleaching and disinfect. The concentration of organic and inorganic peroxo compounds, such as. B. peracetic acid, Hydrogen peroxide, perborate, percarbonate, persulfate in aqueous Solutions are either electrochemical (potentiometry, Ampero metry, polarography), titrimetric (iodometry, manganoma trie, cerimetry) or spectroscopic (UV / VIS via color reaction NEN, infrared spectroscopy) determined. The online measurement of Peroxo concentrations, e.g. B. of peracetic acid. UV / VIS spectroscopic using flow injection analysis using a color action.
Die Konzentrationsbestimmung von Peroxoverbindungen ist jedoch nur möglich, wenn sie in relativ geringen Konzentrationen in der wäßrigen Lösung vorhanden sind. Dies gilt generell für alle o. g. Methoden.However, the concentration determination of peroxo compounds is only possible if they are in relatively low concentrations in the aqueous solution are present. This generally applies to all of the above. Methods.
Die elektrochemische Konzentrationsbestimmung wird durch die An wesenheit anderer Ionen oder grenzflächenaktiver Substanzen durch Belegung des Elektrodenmaterials erheblich gestört und ist deshalb nicht on-line-fähig.The electrochemical concentration determination is by the An presence of other ions or surfactants is considerably disturbed by occupancy of the electrode material therefore not online-capable.
Die titrimetrische Konzentrationsbestimmung ist zeitaufwendig, nicht on-line-fähig und fehlerbehaftet, da der Umschlagpunkt subjektiv erkannt werden muß.Titrimetric concentration determination is time-consuming not online-capable and error-prone because of the transition point must be recognized subjectively.
Die spektroskopische Konzentrationsbestimmung hat den Nachteil, daß die UV/VIS-Spektroskopie erst nach Farbreaktion möglich ist. Die IR-Spektroskopie bereitet Probleme wegen des Küvettenmateri als aus NaCl, KBr und ist nicht geeignet für wäßrige Systeme.Spectroscopic concentration determination has the disadvantage that UV / VIS spectroscopy is only possible after a color reaction. IR spectroscopy causes problems due to the cuvette material than from NaCl, KBr and is not suitable for aqueous systems.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Kon zentrationsbestimmung von Peroxoverbindungen zu beschaffen, das sowohl für die Bestimmung hoher als auch niedriger Konzentratio nen einsetzbar ist, und das im on-line-Verfahren einsetzbar ist.The invention has for its object a method for Kon to determine the concentration of peroxo compounds, the both for the determination of high and low concentration NEN can be used, and that can be used in the online process.
Zur Lösung dieser Aufgabe dienen die Merkmale des Anspruchs 1.The features of claim 1 serve to achieve this object.
Die Erfindung sieht in vorteilhafter Weise vor zur Konzentra tionsbestimmung von anorganischen oder organischen Peroxoverbin dungen die Absorptionsspektren im nahen Infrarotbereich zu ver wenden, und zwar in einem Wellenlängenbereich zwischen 800 und 2500 nm.The invention advantageously provides for the concentra determination of inorganic or organic peroxo compound absorbance spectra in the near infrared range turn, in a wavelength range between 800 and 2500 nm.
Die Nahe Infrarotspektroskopie ist insbesondere für Bestimmungen hoher aber auch niedriger Konzentrationen von Peroxoverbindungen einsetzbar, da durch die Absorption von elektromagnetischer Strahlung im nahen Infrarotbereich (NIR-Bereich) überwiegend Ober- und Kombinationsschwingungsbanden von OH-, NH- und CH- Moleküleinheiten auftreten, deren Intensität wesentlich schwä cher im Vergleich zu den Grundschwingungsbanden im IR-Bereich ist.The near infrared spectroscopy is used in particular for determinations of high but also lower levels of peroxy compounds as by the absorption of electromagnetic radiation in the near infrared range (NIR range) predominantly upper and combination vibration bands of OH - occur, NH and CH molecular units whose intensity is significantly weaker compared to the fundamental vibration bands in the IR range.
Das Verfahren ist on-line-fähig, indem glasfasergekoppelte Spek trometersysteme für den NIR-Bereich in Verbindung mit Durchfluß küvetten und Tauchsonden von ca. 0,01-10 mm Schichtdicken, bzw. ATR-Sonden verwendet werden.The process is online-enabled by using fiber optic coupled spec Trometer systems for the NIR range in connection with flow cuvettes and immersion probes with a layer thickness of approx. 0.01-10 mm, or ATR probes can be used.
Bei der NIR-Spektroskopie können Fenstermaterialien aus Glas, Quartz und Saphir eingesetzt werden, welche unempfindlich gegen über Wasser, Chemikalien und mechanischer Beanspruchung sind.With NIR spectroscopy, window materials made of glass, Quartz and sapphire are used, which are insensitive to are above water, chemicals and mechanical stress.
Das Verfahren ist ohne Probenverdünnung, bzw. ohne Probenvorbe reitung einsetzbar.The method is without sample dilution or without sample preparation can be used on horseback.
Es erfolgt keine Störung des Signals durch Tenside.The signal is not disturbed by surfactants.
Überraschenderweise besteht nicht nur zwischen der Absorbanz bei einer Wellenlänge und der Konzentration der Peroxoverbindung ein linearer Zusammenhang (siehe Beispiel Peressigsäure), sondern auch zwischen der integralen Absorbanz und der Konzentration, wie am Beispiel von und H2O2 gezeigt. Dies ist insbesondere in den Fällen anwendbar, bei denen die Unterschiede in der Absor banz in Abhängigkeit von der Konzentration nur gering sind.Surprisingly, there is not only a linear relationship between the absorbance at a wavelength and the concentration of the peroxo compound (see example peracetic acid), but also between the integral absorbance and the concentration, as shown by the example of and H 2 O 2 . This is particularly applicable in cases where the differences in the absorber as a function of the concentration are only slight.
Das erfindungsgemäße Verfahren ist beispielsweise zur on-line- Überwachung des Gehalts an Peroxoverbindungen in Bleich- und Reinigungsprozessen, oder zur Qualitätskontrolle durch Bestim mung der Konzentration von Peroxoverbindungen bei Lagerung; (Zerfallsbestimmung)verwendbar.The method according to the invention is for example for on-line Monitoring the content of peroxo compounds in bleaching and Cleaning processes, or for quality control by Bestim measurement of the concentration of peroxo compounds during storage; (Decay determination) can be used.
Im folgenden werden unter Bezugnahme auf die Zeichnungen Bei spiele der Erfindung näher erläutert: In the following, with reference to the drawings games of the invention explained in more detail:
Es zeigen:Show it:
Fig. 1 NIR-Absorptionsspektren von Wasser und Gleichgewichts peressigsäure in unterschiedlichen Konzentrationen, Fig. 1 NIR absorption spectra of water and equilibrium peracetic acid in different concentrations,
Fig. 2 die konzentrationsabhängige Absorbanz von Gleichge wichtsperessigsäure, Fig. 2 shows the concentration-dependent absorbance of Equilibrium wichtsperessigsäure,
Fig. 3 NIR-Absorptionsspektren von Wasser und Gleichgewichts peressigsäure in Gegenwart unterschiedlicher Tenside, Fig. 3 NIR absorption spectra of water and equilibrium peracetic acid in the presence of various surfactants,
Fig. 4 die integrale Absorbanz von Bleichflotten mit unter schiedlichen H2O2-Gehalten. Fig. 4 shows the integral absorbance of bleaching liquors with different H 2 O 2 contents.
Die im Nachstehenden beschriebenen Untersuchungen zeigen Mög lichkeiten auf, wie unter Anwendung der NIR-Spektroskopie und chemometrischer Auswerteverfahren diese Meßtechnik zur quantita tiven Bestimmung anorganischer und organischer Peroxoverbindun gen in hochkonzentrierten, wäßrigen Lösungen eingesetzt werden kann.The studies described below show Mög on how to use NIR spectroscopy and chemometric evaluation process this measurement technique to quantita tive determination of inorganic and organic peroxo compounds gene can be used in highly concentrated, aqueous solutions can.
Besonders intensive NIR-Banden besitzen dabei Lösungen mit Mole külverbindungen die OH-, NH- und CH-Gruppen enthalten. So hat z. B. Wasser im NTR-Bereich zwei intensive Wasserbanden bei den Wellenlängen 1455 nm und 1930 nm, wobei die letztere von der In tensität wesentlich stärker ist.Particularly intensive NIR bands have solutions with moles cool compounds containing OH, NH and CH groups. So had e.g. B. water in the NTR area two intense water bands in the Wavelengths 1455 nm and 1930 nm, the latter from the In intensity is much stronger.
Umgekehrt lassen sich somit NIR-spektroskopisch in Wasser gelö ste Substanzen wie z. B. Oxidations- und Reduktionsmittel wenn sie nicht selbst IR-aktiv sind, durch Änderungen der Wasser stoffbrückenbindungsverhältnisse in wäßrigen Systemen in Abhän gigkeit von ihrer Konzentration detektieren. Dabei werden in charakteristischer Weise die Lagen, Konturen und Intensitäten der Wasserbanden verändert. Diese Effekte können mit Hilfe von chemometrischen Methoden quantitativ ausgewertet und für eine on-line Meßtechnik genutzt werden. Conversely, it can be dissolved in water using NIR spectroscopy ste substances such. B. oxidizing and reducing agents if they are not themselves IR-active due to changes in water material bond relationships in aqueous systems in depend detect their concentration. Thereby in characteristically the positions, contours and intensities the water gangs changed. These effects can be solved with the help of chemometric methods evaluated quantitatively and for a on-line measurement technology can be used.
Fig. 1 zeigt die NIR-Absorptionsspektren von Wasser und Gleich gewichtsperessigsäure, (bestehend aus Peressigsäure, Essigsäure, H2O2, Stabilisatoren und Wasser) in Abhängigkeit von der Wellen länge. Die Gleichgewichtsperessigsäure wurde ohne weitere Ver dünnung in den handelsüblich angebotenen Konzentrationen von 15 und 40% eingesetzt. Die Schichtdicke der Küvette beträgt 0,5 mm. Fig. 1 shows the NIR absorption spectra of water and equilibrium peracetic acid, (consisting of peracetic acid, acetic acid, H 2 O 2 , stabilizers and water) as a function of the wavelength. The equilibrium peracetic acid was used without further dilution in the commercially available concentrations of 15 and 40%. The layer thickness of the cuvette is 0.5 mm.
In Gegenwart von Gleichgewichtsperessigsäure verändert sich in Abhängigkeit von deren Konzentration die Intensität der Wasser banden bei ca. 1450 und 1930 nm.In the presence of equilibrium peracetic acid changes in Depending on their concentration, the intensity of the water banded at around 1450 and 1930 nm.
In Fig. 2 ist zu sehen, daß für die Gleichgewichtsperessigsäure ein linearer Zusammenhang zwischen der Absorbanz bei 1446 nm und der Konzentration bis 40% Peressigsäure besteht. Dies ent spricht der höchsten Peressigsäurekonzentration, die kommerziell erhältlich ist. Die Verdünnung erfolgte mit bidestilliertem Was ser. Die Schichtdicke der Küvette beträgt 1 mm. Für Bleich-, Desinfektions- und Reinigungsprozesse ist es notwendig, daß Ten side das NIR-Meßsignal nicht beeinflussen. Dies wurde durch die Zugabe von jeweils 0,5 g/l Tensid mit unterschiedlicher Ionoge nität (NaDS Natrium-Dodecylsulfat anionisch, CPC N- Cetylpyridiniumchlorid kationisch, Marlipal O 13/90 verzweigter Oxoalkohol nichtionisch) zur Peressigsäurelösung getestet.In Fig. 2 it can be seen that for the equilibrium peracetic acid there is a linear relationship between the absorbance at 1446 nm and the concentration up to 40% peracetic acid. This corresponds to the highest peracetic acid concentration that is commercially available. The dilution was carried out with bidistilled water. The layer thickness of the cuvette is 1 mm. For bleaching, disinfection and cleaning processes, it is necessary that ten side not influence the NIR measurement signal. This was tested by adding 0.5 g / l surfactant with different ionogenicity (NaDS sodium dodecyl sulfate anionic, CPC N-cetylpyridinium chloride cationic, Marlipal O 13/90 branched oxo alcohol non-ionic) to the peracetic acid solution.
Fig. 3 zeigt, daß das NIR-Signal durch alle untersuchten Tenside nicht verändert wird. Fig. 3 shows that the NIR signal is not changed by all investigated surfactants.
Es besteht die Möglichkeit, aus den gemessenen Absorptionen im NIR-Spektralbereich eine Kalibriergerade zur Vorhersage unbe kannter Konzentrationen zu erstellen. Wenn die Unterschiede in der Absorbanz bei einer festgelegten Wellenlänge zu gering sind, wird die integrale Absorbanz über einen vorbestimmten NIR- Wellenlängenbereich berechnet.It is possible to measure from the measured absorptions in the NIR spectral range a calibration line for prediction unbe to create known concentrations. If the differences in the absorbance at a defined wavelength is too low, the integral absorbance is determined via a predetermined NIR Wavelength range calculated.
Diese Vorgehensweise ist auch auf die quantitative Bestimmung von H2O2-Konzentrationen mit Hilfe der NIR-Spektroskopie verwend bar (siehe Fig. 4). Es besteht ein linearer Zusammenhang zwi schen der integralen Absorbanz zwischen 1525 und 1800 nm und der Konzentration des Wasserstoffperoxids in einer Bleichflotte (hier: pH 10).This procedure can also be used for the quantitative determination of H 2 O 2 concentrations using NIR spectroscopy (see FIG. 4). There is a linear relationship between the integral absorbance between 1525 and 1800 nm and the concentration of hydrogen peroxide in a bleaching liquor (here: pH 10).
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19858027A DE19858027C2 (en) | 1998-12-16 | 1998-12-16 | Method for the quantitative determination of inorganic and organic peroxo compounds in highly concentrated aqueous solutions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19858027A DE19858027C2 (en) | 1998-12-16 | 1998-12-16 | Method for the quantitative determination of inorganic and organic peroxo compounds in highly concentrated aqueous solutions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE19858027A1 true DE19858027A1 (en) | 2000-06-29 |
| DE19858027C2 DE19858027C2 (en) | 2001-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19858027A Expired - Fee Related DE19858027C2 (en) | 1998-12-16 | 1998-12-16 | Method for the quantitative determination of inorganic and organic peroxo compounds in highly concentrated aqueous solutions |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1405057A1 (en) * | 2001-07-09 | 2004-04-07 | Pharmaceutical Systems, Inc. | Spectrophotometric determination of gas phase compositions |
| US6940073B1 (en) | 2002-11-08 | 2005-09-06 | Georgia Tech Research Corporation | Method for determining the concentration of hydrogen peroxide in a process stream and a spectrophotometric system for the same |
| EP3737426A4 (en) * | 2017-12-21 | 2021-08-18 | Accelera Technologies, LLC | System and method for detecting peractic acid and hydrogen peroxide vapor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0714024A1 (en) * | 1994-11-25 | 1996-05-29 | Kyoto Dai-ichi Kagaku Co., Ltd. | Method of and apparatus for determining hydrogen peroxide |
| WO1997040365A1 (en) * | 1996-04-22 | 1997-10-30 | Rosemount Analytical Inc. | Method and apparatus for measuring vaporous hydrogen peroxide |
| US5847393A (en) * | 1995-05-26 | 1998-12-08 | Uop | Control of gaseous hydrogen peroxide concentration during sterilization |
-
1998
- 1998-12-16 DE DE19858027A patent/DE19858027C2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0714024A1 (en) * | 1994-11-25 | 1996-05-29 | Kyoto Dai-ichi Kagaku Co., Ltd. | Method of and apparatus for determining hydrogen peroxide |
| US5847393A (en) * | 1995-05-26 | 1998-12-08 | Uop | Control of gaseous hydrogen peroxide concentration during sterilization |
| WO1997040365A1 (en) * | 1996-04-22 | 1997-10-30 | Rosemount Analytical Inc. | Method and apparatus for measuring vaporous hydrogen peroxide |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1405057A1 (en) * | 2001-07-09 | 2004-04-07 | Pharmaceutical Systems, Inc. | Spectrophotometric determination of gas phase compositions |
| EP1405057A4 (en) * | 2001-07-09 | 2007-06-20 | Care Biopharma Llc | Spectrophotometric determination of gas phase compositions |
| US6940073B1 (en) | 2002-11-08 | 2005-09-06 | Georgia Tech Research Corporation | Method for determining the concentration of hydrogen peroxide in a process stream and a spectrophotometric system for the same |
| EP3737426A4 (en) * | 2017-12-21 | 2021-08-18 | Accelera Technologies, LLC | System and method for detecting peractic acid and hydrogen peroxide vapor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19858027C2 (en) | 2001-02-22 |
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