WO2010043825A1 - Determination de la concentration en sel d'une solution aqueuse - Google Patents
Determination de la concentration en sel d'une solution aqueuse Download PDFInfo
- Publication number
- WO2010043825A1 WO2010043825A1 PCT/FR2009/051977 FR2009051977W WO2010043825A1 WO 2010043825 A1 WO2010043825 A1 WO 2010043825A1 FR 2009051977 W FR2009051977 W FR 2009051977W WO 2010043825 A1 WO2010043825 A1 WO 2010043825A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- concentration
- salt
- representative
- raman spectrum
- product
- Prior art date
Links
- 150000003839 salts Chemical class 0.000 title claims abstract description 52
- 239000007864 aqueous solution Substances 0.000 title claims description 27
- 238000000034 method Methods 0.000 claims abstract description 38
- 238000001237 Raman spectrum Methods 0.000 claims abstract description 28
- 238000005259 measurement Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001228 spectrum Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 230000004907 flux Effects 0.000 claims description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 4
- 239000004202 carbamide Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 150000001242 acetic acid derivatives Chemical class 0.000 claims description 2
- 150000003841 chloride salts Chemical class 0.000 claims description 2
- 235000013305 food Nutrition 0.000 claims description 2
- 150000004675 formic acid derivatives Chemical class 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 11
- 238000001069 Raman spectroscopy Methods 0.000 description 10
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- 239000000523 sample Substances 0.000 description 6
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000010365 information processing Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 235000011056 potassium acetate Nutrition 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000005862 Whey Substances 0.000 description 1
- 102000007544 Whey Proteins Human genes 0.000 description 1
- 108010046377 Whey Proteins Proteins 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000013618 yogurt Nutrition 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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
-
- 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
-
- 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
- G01N33/1873—Ice or snow
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/24—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing the transmission of wave or particle radiation through the material
-
- 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
- G01N33/02—Food
Definitions
- the present invention relates to a method for determining the salt concentration of an aqueous solution.
- This problem also arises particularly in the food industry. It may be to quantify the salt content of a product during its manufacturing process or at the end of this manufacturing process.
- An object of the present invention is to provide a method for determining the salt concentration in an aqueous solution which allows this determination without sampling of the solution to be controlled and with or without contact with this solution.
- the method for determining the concentration of a salt possibly present in a product containing at least water is characterized in that it comprises the following steps: a) the spectrum is recorded; Raman photons scattered by the product in a wave number range between 2500 and 4000 cm 1 ; b) determining, for a given product temperature, two points of said spectrum corresponding to two specific values of wave numbers; c) calculating the ratio of two quantities representative of said points, whereby a measurement report is obtained; d) comparing said measurement ratio with a reference chart representative of the salt concentration for different temperatures as a function of the concentration of said salt.
- the implementation of the method meets the objectives set since in an initial phase, it is necessary to make a reference chart representative of the concentration of salt in the aqueous solution or more generally in the product for different temperatures depending salt concentration, which can be done in the laboratory.
- This preliminary step is followed by a step of effectively measuring the solution or, more generally, the product to be tested simply by using a recording of the Raman spectrum of the product to be tested and by digital and logical processing of this recording.
- the means for implementing the method comprise only a photon source, a Raman spectrometer and information processing means.
- aqueous solution of a salt means any product containing a salt and water in a highly variable percentage. III can only act as traces of water.
- this reference chart can be done in the laboratory from a sample of the aqueous solution to be tested.
- the method of determining the concentration is characterized in that said curves of the reference chart are mathematical regression curves representative of the values of the reference measurement ratios for the same temperature.
- the concentration determination method is characterized in that one of the two specific wave number values is selected from a sub-range of wave numbers in which the Raman spectrum is representative of the incoming salt. in the composition of said product or in which the Raman spectrum exhibits a variation with respect to that of the water due to said salt and the other specific wavenumber value is selected in another sub-range of wavenumbers in which the Raman spectrum is representative of water in general.
- FIG. 1 shows a typical Raman spectrum for a salt in aqueous solution
- FIG. 2 shows an example of determination of the reference curve of the salt concentration as a function of the Raman intensity for a given temperature
- FIG. 3 shows an example of an abacus giving the concentration of salt in an aqueous solution for different temperatures
- FIG. 4 shows equipment for carrying out the method according to the invention for determining the content of fluxes on a roadway
- FIG. 4A shows the essential elements of the information processing means used in the equipment shown in FIG. 4.
- FIG. 5 shows examples of Raman spectra SA, SB and SC respectively for solutions of sodium chloride, potassium acetate and urea.
- the method according to the invention uses Raman spectroscopy.
- the Raman spectrum of the scattered beam is characteristic of the material to which the electromagnetic beam has been applied,
- the method for determining the salt concentration of an aqueous solution comprises a preliminary step of forming a reference curve abacus and then a step of effectively determining the salt concentration of the aqueous solution to be studied.
- FIG. 1 there is shown a Raman spectrum S for the solution whose salt concentration is to be determined, this Raman spectrum corresponding to a given temperature and a given salt concentration.
- the abscissas represent the wave numbers and the ordinates the Raman intensities.
- the total range PL of wave numbers can be divided into two sub-ranges PL1 and PL2 corresponding respectively to an area representative of the element entering the composition of the solution or in which the Raman spectrum exhibits a variation with respect to that water due to said element and an area representative of the water in general outside the possible field of influence of the previous element.
- the appropriate choice of two specific wave numbers S1 and S2, located respectively in each of the sub-ranges makes it possible to improve the sensitivity of the method for obtaining the reference chart. For example, for the representative wavenumber of the element entering the composition, one could choose a characteristic peak appearing in the Raman spectrum.
- each of the wave numbers S1 and S2 corresponds to a point P1 and P2 on the curve S.
- Each point P1 and P2 is associated with a magnitude representative of its Raman intensity, and these can be the intensities themselves. and h or areas Ai and A 2 between the curve S and the abscissa for portions of limited curve around the points Pl and P2. Then, a measurement ratio Rm is calculated between these representative quantities.
- the Raman spectrum is repeated on a sample corresponding to a different concentration. From these different measurements, it is possible to plot on a graph the different points N, corresponding to the same temperature T for different salt concentrations.
- the measurement points N correspond to a solution of sodium chloride at a fixed temperature.
- An adjustment of the different measurement points N is performed to associate with this measurement set a representative curve Di, for example a linear adjustment in logarithmic scale.
- the abacus shown in FIG. 3 constituted by the curves giving the relationship between the measurement ratio RM and the concentration constitutes the reference chart used in the method that is the subject of the invention.
- the Raman spectrum is determined for the aqueous solution to be tested and the temperature of the solution is also determined.
- the points Pi and P2 corresponding to the specific wave numbers S1 and S2 are determined.
- the measurement ratio RM corresponding to the particular copy of the aqueous solution to be tested is determined.
- a pair of values is thus obtained consisting of the measurement ratio value RM and the temperature T.
- the salt concentration of the aqueous solution can then be determined by using the reference chart shown in FIG. 3. For the temperature recorded, the corresponding curve D and the point corresponding to the measurement ratio determined on FIG. curve D, giving the concentration of the aqueous solution.
- a first use consists of an equipment for determining the phase of an aqueous solution consisting of an aqueous solution of road melts (eg NaCl) spread on a roadway.
- road melts eg NaCl
- the equipment comprises a vehicle 10 outside which is mounted a Raman probe 12 directed towards the roadway 14 on which was spread the aqueous solution to be tested.
- the probe 12 is connected for example by optical fibers 16 to an installation 18 embedded in the vehicle.
- the installation may comprise a laser source 20 and a Raman spectroscope 22 in relation to the optical fibers 16.
- the spectroscope 22 transmits to a processing unit 24 the information corresponding to the Raman spectrum S established successively.
- the instants of taking information can be generated automatically by the processing unit 24.
- a processing unit 24 is associated with a memory 26 able to store the data relating to the reference chart, the wave numbers S1. and S2 as well as received Raman spectra processing software.
- a measurement ratio R M is calculated and the comparison is made between the reference chart and the calculated measurement ratio RM to deduce the concentration of the solution. aqueous.
- a display screen 28 allows the operator to see the results. These results can also constitute control data of a device or process and thus enter the servo loop of the device or process.
- Other uses of the process can be considered in addition to those already mentioned. It suffices that they make use of the determination of the concentration of a salt in a product, in particular an aqueous solution, since it contains a sufficient quantity of water to make possible the implementation of the process.
- salt can of course be different in nature.
- the salt may thus be selected from the group comprising chlorides, acetates, formates, urea, or a combination of said salts.
- FIG. 5 shows three Raman spectra SA, SB and SC respectively corresponding to sodium chloride, potassium acetate and urea.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2011119618/28A RU2011119618A (ru) | 2008-10-17 | 2009-10-16 | Определение концентрации соли в водном растворе |
CN2009801414726A CN102187205A (zh) | 2008-10-17 | 2009-10-16 | 水溶液的盐浓度的确定 |
JP2011531544A JP2012506040A (ja) | 2008-10-17 | 2009-10-16 | 水溶液の塩濃度の決定 |
US13/124,012 US20110222055A1 (en) | 2008-10-17 | 2009-10-16 | Determination of the salt concentration of an aqueous solution |
CA2740828A CA2740828A1 (fr) | 2008-10-17 | 2009-10-16 | Determination de la concentration en sel d'une solution aqueuse |
EP09760162A EP2344865A1 (fr) | 2008-10-17 | 2009-10-16 | Determination de la concentration en sel d'une solution aqueuse |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0857091 | 2008-10-17 | ||
FR0857091A FR2937421B1 (fr) | 2008-10-17 | 2008-10-17 | Determination de la concentration en sel d'une solution aqueuse. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010043825A1 true WO2010043825A1 (fr) | 2010-04-22 |
Family
ID=40600107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2009/051977 WO2010043825A1 (fr) | 2008-10-17 | 2009-10-16 | Determination de la concentration en sel d'une solution aqueuse |
Country Status (9)
Country | Link |
---|---|
US (1) | US20110222055A1 (fr) |
EP (1) | EP2344865A1 (fr) |
JP (1) | JP2012506040A (fr) |
KR (1) | KR20110086704A (fr) |
CN (1) | CN102187205A (fr) |
CA (1) | CA2740828A1 (fr) |
FR (1) | FR2937421B1 (fr) |
RU (1) | RU2011119618A (fr) |
WO (1) | WO2010043825A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9678029B2 (en) | 2014-08-22 | 2017-06-13 | Honeywell International Inc. | Oxidation catalyst detector for aircraft components |
CN114341625A (zh) * | 2019-06-28 | 2022-04-12 | 阿尔托大学注册基金会 | 定量拉曼光谱 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4446791C1 (de) * | 1994-12-24 | 1996-04-18 | Wissenschaft Und Technik Dresd | Verfahren und Vorrichtung zur berührungslosen Messung der Konzentration von Tausalzen auf Fahrbahnen |
DE19547968A1 (de) * | 1995-12-22 | 1997-06-26 | Schmidt Holding Europ Gmbh | Verfahren und Vorrichtung zur Messung der Konzentration von Tausalzen auf Fahrbahnen |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3478530A (en) * | 1967-12-15 | 1969-11-18 | Worthington Corp | Absorption refrigeration system |
US3723007A (en) * | 1971-01-22 | 1973-03-27 | Avco Corp | Remote quantitative analysis of materials |
JPS52109995A (en) * | 1976-03-12 | 1977-09-14 | Meiji Milk Prod Co Ltd | Process for simultaneous measurements of moisture and salt in food |
FR2598510B1 (fr) * | 1986-05-07 | 1988-08-26 | France Etat Ponts Chaussees | Capteur de surface d'une voie ou chaussee et application a la determination de l'etat de surface et de la temperature de congelation d'une phase aqueuse situee sur la surface |
JP2967888B2 (ja) * | 1991-09-03 | 1999-10-25 | 井関農機株式会社 | 近赤外分光分析による温度推定法 |
US6023065A (en) * | 1997-03-10 | 2000-02-08 | Alberta Research Council | Method and apparatus for monitoring and controlling characteristics of process effluents |
WO2003072216A1 (fr) * | 2002-02-27 | 2003-09-04 | Yoshihito Shirai | Methode de production d'un concentre par congelation et decongelation, et appareil associe |
JP2003270133A (ja) * | 2002-03-14 | 2003-09-25 | Kubota Corp | 分光分析装置 |
JP5050179B2 (ja) * | 2005-10-19 | 2012-10-17 | 名古屋電機工業株式会社 | 特性値計測方法およびその装置 |
-
2008
- 2008-10-17 FR FR0857091A patent/FR2937421B1/fr active Active
-
2009
- 2009-10-16 US US13/124,012 patent/US20110222055A1/en not_active Abandoned
- 2009-10-16 RU RU2011119618/28A patent/RU2011119618A/ru unknown
- 2009-10-16 JP JP2011531544A patent/JP2012506040A/ja active Pending
- 2009-10-16 CA CA2740828A patent/CA2740828A1/fr not_active Abandoned
- 2009-10-16 WO PCT/FR2009/051977 patent/WO2010043825A1/fr active Application Filing
- 2009-10-16 CN CN2009801414726A patent/CN102187205A/zh active Pending
- 2009-10-16 KR KR1020117011104A patent/KR20110086704A/ko not_active Application Discontinuation
- 2009-10-16 EP EP09760162A patent/EP2344865A1/fr not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4446791C1 (de) * | 1994-12-24 | 1996-04-18 | Wissenschaft Und Technik Dresd | Verfahren und Vorrichtung zur berührungslosen Messung der Konzentration von Tausalzen auf Fahrbahnen |
DE19547968A1 (de) * | 1995-12-22 | 1997-06-26 | Schmidt Holding Europ Gmbh | Verfahren und Vorrichtung zur Messung der Konzentration von Tausalzen auf Fahrbahnen |
Non-Patent Citations (5)
Title |
---|
BECUCCI M ET AL: "Raman spectroscopy for water temperature sensing", LASER PHYSICS MAIK NAUKA/INTERPERIODICA PUBLISHING RUSSIA, vol. 9, no. 1, January 1999 (1999-01-01), pages 422 - 425, XP002564114, ISSN: 1054-660X * |
BURIKOV SERGEI A ET AL.: "New Approaches to Determination of Temperature and Salinity of Seawater by Laser Raman Spectroscopy", EARSEL EPROCEEDINGS, vol. 3, 2004, pages 298 - 305, XP002564115 * |
DUBESSY J ET AL: "Determination of chlorinity in aqueous fluids using Raman spectroscopy of the stretching band of water at room temperature: Application to fluid inclusions", APPLIED SPECTROSCOPY JANUARY 2002 SOCIETY FOR APPLIED SPECTROSCOPY US, vol. 56, no. 1, January 2002 (2002-01-01), pages 99 - 106, XP002527956 * |
FURIC K ET AL: "Raman spectroscopic study of sodium chloride water solutions", JOURNAL OF MOLECULAR STRUCTURE ELSEVIER NETHERLANDS, vol. 550-551, 5 September 2000 (2000-09-05), pages 225 - 234, XP002527955, ISSN: 0022-2860 * |
MARCHETTI M, LIVET J, BOUILLOUD L, DURICKOVIC I, BOURSON P: "Comportement de la neige sur une chaussée Cycle de vie des fondants routiers", JOURNÉES TECHNIQUES ROUTES 2006, 1 February 2006 (2006-02-01) - 2 February 2006 (2006-02-02), Nantes, pages 1 - 13, XP002527957, Retrieved from the Internet <URL:http://media.lcpc.fr/ext/pdf/sem/2006_jtr_s405.pdf> [retrieved on 20090513] * |
Also Published As
Publication number | Publication date |
---|---|
CN102187205A (zh) | 2011-09-14 |
CA2740828A1 (fr) | 2011-04-22 |
JP2012506040A (ja) | 2012-03-08 |
EP2344865A1 (fr) | 2011-07-20 |
US20110222055A1 (en) | 2011-09-15 |
FR2937421B1 (fr) | 2010-12-31 |
RU2011119618A (ru) | 2012-11-27 |
KR20110086704A (ko) | 2011-07-29 |
FR2937421A1 (fr) | 2010-04-23 |
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