EP1820014A1 - Verfahren zur bestimmung/analyse der einzelkonzentrationen eines mehrkomponentigen gasförmigen stoffgemischs bestehend aus einem kalibrier- und auswerteteil - Google Patents
Verfahren zur bestimmung/analyse der einzelkonzentrationen eines mehrkomponentigen gasförmigen stoffgemischs bestehend aus einem kalibrier- und auswerteteilInfo
- Publication number
- EP1820014A1 EP1820014A1 EP05846074A EP05846074A EP1820014A1 EP 1820014 A1 EP1820014 A1 EP 1820014A1 EP 05846074 A EP05846074 A EP 05846074A EP 05846074 A EP05846074 A EP 05846074A EP 1820014 A1 EP1820014 A1 EP 1820014A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- calibration
- individual concentrations
- measured
- point
- feature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
Definitions
- the invention relates to a method for determining / analyzing the individual concentrations of a multicomponent substance mixture, the target substance, measured with an analyzer, in the case of relevant variable environmental conditions.
- toluene / ethanol mixtures For online monitoring of soil remediation processes, for example, toluene / ethanol mixtures must be measured in order to determine their individual concentrations. In this single concentration analysis, relevant, variable ambient conditions, such as ambient temperature, air humidity, must be taken into account.
- EP 0 829 718 describes the analysis of 1-component gas mixtures. It does not take into account variable but relevant environmental influences.
- WO 00/34 766 likewise describes the analysis of 1-component gas mixtures with a gas analyzer which supplies conductivity time profiles as raw data.
- the object of the invention is to provide an analysis method with which the individual concentrations of an n-component mixture of substances measured with an analyzer can be determined.
- the method according to the features of claim 1 solves the task in a local manner.
- the presented analysis method consists of two parts: the calibration part, which is unique and precedes an evaluation project in any case, and the actual evaluation part.
- a mathematical model is created for the actual, computer-aided evaluation of the target substance. This part is performed once prior to the routine use of the evaluation procedure and is used to calibrate the procedure.
- the individual concentration analysis is then carried out with the aid of the model data acquired in the calibration part, the raw data measured by the analyzer and the measured relevant environmental data.
- the target substance an n-component substance mixture
- the raw data depends on the individual concentrations and possibly on surrounding data. If the raw data depend on certain environmental data, for example ambient temperature, then this environmental data is relevant and will be taken into account in the investigation. For the description of the calibration part of the method, it is initially assumed that there are no relevant environmental conditions, ie that the raw data is independent of environmental influences.
- the individual concentrations are metered, ie adjusted to fixed values, and then measured with the analyzer. In this case, each individual concentration must be doped at at least two different values, for example substance i with the concentration values cu, Ci 2 ,
- n features Mi, ..., M n are now extracted. These n feature sizes depend on the individual concentrations Ci, ---, C n .
- the feature quantities must be monotone in the Ci.
- the respective extraction of the feature sizes depends on the specific application. Does the raw data consist of conductance time len, LZP, for example, partial sums, relative or absolute extrema can serve as feature quantities. Thus, for each concentration calibration point, there is one unique feature point. All feature points span an n-dimensional feature field.
- the feature points belonging to the concentration calibration points are calculated once in the calibration part of the method and then made available to the evaluation method together with the concentration calibration points.
- the target substance with unknown individual concentrations c ⁇ is measured with the analyzer. From the measured raw data, the evaluation part calculates the sample feature point MP belonging to this sample with the individual features M 1 ,..., M n . Thereafter, the n + 1 feature points MPi,..., MP (n + i) are determined from the feature field provided by the calibration part, whose Euclidean distance to the sample feature point MP is low. These feature points MPi,..., MP 1n + D include unambiguously concentration calibration points from the concentration calibration field whose individual concentrations are known. The individual concentrations belonging to the sample feature point MP are obtained by linear approximation.
- a hyperplane is laid through the points (MPi, Ci, i),..., (MP (n + D , Ci, n + i) and evaluated at the point MP , j denotes the (known) concentration of the i-th component of the n-component substance mixture at the j th concentration calibration point.
- the sample feature point MP having the features Mi and M 2 is determined from the raw data and the feature points MPi, MP 2 and MP 3 nearest thereto are determined from the feature field ,
- concentration calibra- rierddlingen (1, 1), (1, 2), (2, 1).
- m> 1, i. If the raw data are also dependent on environmental influences, all relevant environmental conditions are recorded in an m-dimensional environmental calibration field.
- This m-dimensional environmental calibration field consists of ambient calibration points which represent the values of the relevant environmental conditions. Each relevant ambient condition must be represented by at least two different values in the ambient calibration field.
- a concentration calibration field is created and the associated feature field is calculated.
- the target substance the n-component substance mixture, with unknown individual concentrations is measured with the analyzer.
- the m relevant environmental data are measured and determines the sample environment point UP whose coordinates consist of the measured environmental conditions.
- the m + 1 ambient calibration points UPi, ..., UP (m + 1) are determined from the ambient calibration field provided by the calibration part whose Euclidean distance to the sample ambient point UP is the lowest.
- the Einzel ⁇ concentrations cij, ..., c n j, j 1,. .., m + 1, which determines the individual substances.
- the individual concentrations belonging to the sample environmental point UP again arise, as described in detail in claim 1, by linear approximation.
- FIG. 4 shows the calibration field
- FIG. 5 shows the ambient calibration field
- FIG. 6 shows the concentration calibration field
- FIG. 7 shows the feature field
- FIG. 8 shows the feature field.
- the sum of the guide values of 20 to 40 seconds or of 41 to 80 seconds was selected as feature sizes. From the range of the guide values from 1 to 120, see Figures 1 to 3. D.h.
- FIG. 4 shows the 2-dimensional concentration calibration field for Tempi and Temp2, respectively.
- FIG. 5 shows the ambient calibration field
- FIG. 6 shows the concentration calibration field
- FIG. 7 shows the feature field
- FIG. 8 shows the feature field with sample feature point (marked with an asterisk).
- a two-dimensional environmental calibration field with the ambient condition Ui and the ambient condition U 2 is set up, with two or more values of Ui (in this example: 4) and two or more (in the example: 3) values of U 2 (see FIG. 5).
- FIG. 5 shows the ambient calibration field at two relevant ambient conditions Ui with 4 values and U 2 with 3 values.
- FIG. 6 shows the example of a concentration calibration field in the case of a 2-component target substance.
- n feature quantities form an n-dimensional feature field for a concentration calibration field at a fixed ambient calibration point.
- the feature points are plotted against the corresponding concentration calibration points of Figure 6.
- FIG. 7 shows the 2-dimemional feature field in the case of the 2-component substance mixture and symbolizes the mapping of the concentration calibration points into the feature points.
- the feature point bottom right corresponds to the Konzentrationskalibrier ⁇ point in Figure 6 bottom right, the feature point top left with the Konzentrationskalibrierddling in Figure 6 above left u. s. w.
- the characteristics are determined from the measured raw data.
- FIG. 8 by way of example, the position of a sample feature point * is entered in the feature field in the case of the 2-substance mixture.
- the asterisk represents the sample feature point.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (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)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200410057351 DE102004057351B3 (de) | 2004-11-27 | 2004-11-27 | Verfahren zur Bestimmung und/oder Analyse der Einzelkonzentrationen eines Stoffgemisches |
| PCT/EP2005/012415 WO2006056376A1 (de) | 2004-11-27 | 2005-11-19 | Verfahren zur bestimmung /analyse der einzelkonzentrationen eines eines mehrkomponentigen gasförmigen stoffgemischs bestehend aus eimen kalibrier- und |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1820014A1 true EP1820014A1 (de) | 2007-08-22 |
Family
ID=35998608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05846074A Withdrawn EP1820014A1 (de) | 2004-11-27 | 2005-11-19 | Verfahren zur bestimmung/analyse der einzelkonzentrationen eines mehrkomponentigen gasförmigen stoffgemischs bestehend aus einem kalibrier- und auswerteteil |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1820014A1 (de) |
| DE (1) | DE102004057351B3 (de) |
| WO (1) | WO2006056376A1 (de) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19639072A1 (de) * | 1996-09-11 | 1998-03-12 | Heinz Prof Dr Kohler | Gasanalysegerät mit einem Halbleiter-Gassensor |
| DE19856414C2 (de) * | 1998-12-08 | 2001-03-29 | Karlsruhe Forschzent | Gasanalysegerät |
-
2004
- 2004-11-27 DE DE200410057351 patent/DE102004057351B3/de not_active Expired - Fee Related
-
2005
- 2005-11-19 EP EP05846074A patent/EP1820014A1/de not_active Withdrawn
- 2005-11-19 WO PCT/EP2005/012415 patent/WO2006056376A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006056376A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004057351B3 (de) | 2006-05-24 |
| WO2006056376A1 (de) | 2006-06-01 |
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Legal Events
| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20070127 |
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| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
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| DAX | Request for extension of the european patent (deleted) | ||
| 17Q | First examination report despatched |
Effective date: 20090217 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: KARLSRUHER INSTITUT FUER TECHNOLOGIE Owner name: HOCHSCHULE KARLRUHE GMBH |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20110601 |