EP1774321A1 - Verfahren zur bestimmung des vorhandenseins einer in einem medium homogen verteilten chemischen verbindung mittels kreuzkorrelation eines messpektrums mit referenzspektren - Google Patents

Verfahren zur bestimmung des vorhandenseins einer in einem medium homogen verteilten chemischen verbindung mittels kreuzkorrelation eines messpektrums mit referenzspektren

Info

Publication number
EP1774321A1
EP1774321A1 EP05761631A EP05761631A EP1774321A1 EP 1774321 A1 EP1774321 A1 EP 1774321A1 EP 05761631 A EP05761631 A EP 05761631A EP 05761631 A EP05761631 A EP 05761631A EP 1774321 A1 EP1774321 A1 EP 1774321A1
Authority
EP
European Patent Office
Prior art keywords
chemical compound
identity
medium
homogeneously distributed
function
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Withdrawn
Application number
EP05761631A
Other languages
German (de)
English (en)
French (fr)
Inventor
Rüdiger Sens
Christos Vamvakaris
Sophia Ebert
Erwin Thiel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Publication of EP1774321A1 publication Critical patent/EP1774321A1/de
Withdrawn legal-status Critical Current

Links

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
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • G01N33/2835—Specific substances contained in the oils or fuels
    • G01N33/2882—Markers
    • 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
    • G01N2021/3196—Correlating located peaks in spectrum with reference data, e.g. fingerprint data

Definitions

  • the present invention relates to a method for determining the identity or non-identity of at least one homogeneously distributed in a medium chemical compound V by
  • a variety of methods are used to identify or study chemical compounds.
  • a large part of the analysis method makes use of various types of analysis radiation which interacts with the chemical compound to be investigated and, by absorption, emission, reflection and / or scattering, changes its original intensity as a function of the respective one Wavelength experiences. In this way, one obtains a measuring function I '( ⁇ ), which reproduces the changed intensity of the analysis radiation as a function of the respective wavelength.
  • a measurement function I ' ( ⁇ , c ' ) is obtained which contains the dependence on the concentration c 'of the chemical compound in the medium.
  • the chemical compound can be present as a component in a gas mixture dissolved in a solvent or a solid substance, such as a polymer, the proportion of the chemical compound on the Measuring function I '( ⁇ , c') so small that it is no longer detectable.
  • the object of the present invention was therefore to provide a method which, on the one hand, makes it possible in a simple manner to determine the lowest concentrations of at least one chemical compound in a medium which can no longer be detected by conventional methods based on analysis radiation radiation. on the other hand, allows a determination of the identity or non-identity of at least one suspected chemical compound in a medium by comparison with a known chemical compound in the same or as similar as possible medium.
  • medium any substance which, in principle, allows the homogeneous distribution of the chemical compounds V and V, respectively.
  • gases pasty substances, such as creams, liquids, such as pure liquids, mixtures of liquids, dispersions and paints, as well as solids, such as plastics, wherein superficial coatings of any substrates, such as eg everyday objects of everyday life Bens, automobiles, building facades, etc., are counted with, for example, cured paints.
  • any radiation is considered which can interact with the chemical compound (s) V or V and provides a corresponding wavelength-dependent measurement function.
  • it is electromagnetic radiation, but also particle radiation, such as neutron or electron radiation, or acoustic radiation, such as ultrasound, come into consideration.
  • particle radiation such as neutron or electron radiation
  • acoustic radiation such as ultrasound
  • any known measuring methodology which qualifies the determination of a measuring function I '( ⁇ , c ' ) or comparison function I ( ⁇ , c) is also suitable.
  • Common spectroscopic measuring methods for determining the measuring function are, for example, IR, NIR, Raman, UV, VIS or else NMR spectroscopy.
  • the determination of the measuring function is carried out. If the permeability to the analyte radiation is sufficient, the measuring function can reproduce the absorption or transmission behavior of the system. If this permeability is not ensured or only to an insufficient extent, the measuring function can reflect the reproduction of the wavelength-dependent reflection behavior of the system. If the system is excited by the analyzer radiation to emit radiation, the wavelength-dependent emission behavior can serve as a measuring function. Furthermore, a combination of different measuring functions is possible. For example, both the absorption (transmission) and the emission behavior of the system can be the basis for the determination method according to the invention.
  • the homogeneous distribution of the chemical compound V or V in the medium ensures that the measurement function obtained does not depend on the measuring location.
  • the chemical compounds V and V are usually gases or vapors. However, if a homogeneous distribution achieved by suitable measures, these compounds may also be present as finely divided solid particles.
  • the chemical compounds V and V are usually dissolved in molecular form or also in the form of finely divided solid particles, with pasty media generally not separating the solid particles due to the higher viscosity compared to gaseous or liquid media ⁇ lematic.
  • liquid media by means of suitable measures, for example the presence of dispersing aids and / or continuous mixing, a homogeneous distribution of the solid particles during the determination of the measuring function or comparison function can be achieved.
  • the liquid media are, for example, dispersions or colors, they are usually already adjusted in such a way that no precipitation takes place or only over a relatively long period of time. The determination of the measuring function or comparison function can then normally be carried out without prob ⁇ lems.
  • the method according to the invention can be used to more accurately determine the concentration of ingredients (corresponding to the at least one chemical compound V) in a wide variety of media. So it can u.a. be used for the determination of pollutants, such as nitrogen oxides, sulfur dioxide or finely divided suspended matter in the atmosphere.
  • pollutants such as nitrogen oxides, sulfur dioxide or finely divided suspended matter in the atmosphere.
  • the method according to the invention can also be used to determine the authenticity or non-authenticity of a medium which contains at least one chemical compound V as a marker.
  • the marker can be added in such small amounts that it is neither visually nor by conventional spectroscopic Analysver ⁇ recognizable drive.
  • the method according to the invention can therefore be used to determine the authenticity of a correspondingly marked product packaging, mineral oils, etc., or even to detect the presence of (possibly illegal) manipulations.
  • the measuring function l '( ⁇ , c') or comparison function l ( ⁇ , c) is approximated by a more or less large number of supporting values, it being sensible to use a large number of supporting values in the case of a complex course of the measuring and comparison functions , on the other hand, with measuring and comparison functions with a simpler course, it will do with fewer support values. Accordingly, the intensities I 'and I have to be determined at a multiplicity or even only at a comparatively small number of different wavelengths ⁇ in order to obtain meaningful results. Accordingly, one becomes equation I
  • n is the number of support values
  • Tj and Ij denote the respective intensities at the wavelength ⁇ j
  • N * is again a normalization factor
  • comparison function and measurement function may also be possible in individual cases to carry out the determination of the comparison function and measurement function in different media. This is possible in particular if the influence of the medium in the wavelength range in question is low, the comparison function or measurement function is accordingly determined solely or predominantly by the measurement response of the chemical compound V or V.
  • the normalization factor N makes it possible to scale to a desired value range of the correlation function K ( ⁇ , c ', c).
  • the spectral shift ⁇ usually comprises a wavelength range in which the measurement function I '( ⁇ , c') or comparison function I ( ⁇ , c) is reproduced completely or almost completely. Usually, this is a range B of 0 ⁇ 10-FWHM (Fill Width Half Maximum), where FWHM is the spectral width of the measuring function l '( ⁇ , c') or comparison function l ( ⁇ , c) at half maximum intensity ⁇ ' max or Imax corresponds.
  • Equation (I) determines the concentration c '.
  • the normalization factor N or N * is set to 1 for this case. From the size of K ( ⁇ , c ' , c) the concentration c' can be calculated numerically.
  • the method according to the invention for determining the identity or non-identity of at least one chemical compound V homogeneously distributed in a liquid or solid medium is used.
  • the chemical compound V or V may, in principle, be any substance homogeneously distributed or distributable in the medium, which interacts with the analysis radiation coming into use. This substance may necessarily be contained in the medium according to the provenance of the medium or intentionally added to the medium, for example for marking purposes.
  • such substances may be by-products from the production of the medium or are traces of catalysts which have been used in the preparation of the media (eg solvents, dispersions, plastics, etc.).
  • these substances may be typical of the plant of the oily plant.
  • the identity or non-identity of these substances can therefore be the origin of the oil confirm or exclude. The same applies, for example, to petroleum oils which have a spectrum of typical contaminants dependent on the crude oil deposit.
  • At least one chemical compound V is deliberately added to the medium, for example a liquid, it is possible to determine the medium thus labeled as authentic or to detect possible manipulations.
  • fuel oil which is usually favored for tax purposes, can be distinguished from generally higher taxed diesel oil, or liquid product streams can be separated in large-scale installations, such as, for example, Oil refineries, mark and thereby ver ⁇ follow. Since the method according to the invention permits the determination of very low concentrations of the at least one chemical compound V, it can be added to the medium in a correspondingly low concentration; a possible negative influence by the presence of the compound, for example in the combustion of heating oil or diesel oil, can therefore be excluded.
  • spirits may also be labeled in order to distinguish properly produced, taxed and marketed alcoholic beverages from goods that have been illegally manufactured and placed on the market. It is important, of course, that chemical compounds V are used for marking, which are harmless for human consumption.
  • At least one chemical compound V for marking plastics or coatings. This in turn can be done to determine the authenticity or non-authenticity of the plastics or coatings or to ensure a sorted classification of used plastics in terms of their recycling.
  • the increased sensitivity of the method according to the invention is advantageous because the at least one chemical compound V, for example a dye, in only very small
  • Amounts can be added and thus, e.g. the visual appearance of the Kunststoffstof ⁇ fe or coatings is not affected.
  • the process according to the invention is particularly preferably used for determining the identity or non-identity of at least one chemical compound V homogeneously distributed in a liquid medium.
  • Particularly suitable liquid media are organic liquids and their mixtures, for example alcohols, such as methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol, pentanol, isopentanol, neopentanol or .alpha Hexanol, glycols, such as 1, 2-ethylene glycol, 1,2- or 1, 3-propylene glycol, 1, 2, 2,3 or 1, 4-butylene glycol, di- or triethylene glycol or di- or tripropylene glycol, ethers, such as methyl tert-butyl ether, 1,2-ethylene glycol mono- or dimethyl ether, 1,2-ethylene glycol mono- or diethyl ether, 3-methoxypropanol, 3-isopropoxypropanol, tetrahydrofuran or dioxane, ketones, such as acetone, methyl ethyl ketone or diacetone alcohol, esters, such
  • the method finds particular application for determining the identity or non-identity of at least one chemical compound V in mineral oil.
  • the at least one chemical compound is particularly preferably a marker for mineral oils.
  • Mineral oil markers are usually substances that show absorption in both the visible and non-visible wavelength regions of the spectrum (e.g., in the NIR).
  • markers a wide variety of classes of compounds, e.g. Phthalocyanines, naphthalocyanines, nickel-dithiolene complexes, aminium compounds fertilize aromatic amines, methine and azulenesquaric acid (eg WO 94/02570 A1, WO 96/10620 A1, older German patent application 10 2004 003 791.4), but also azo dyes (eg DE 21 29590 A1, US Pat. No.
  • markers for mineral oil substances which only lead to a visually or spectroscopically recognizable color reaction after extraction from the mineral oil and subsequent derivatization are described as markers for mineral oil.
  • marker substances are, for example, aniline derivatives (for example WO 94/11466 A1) or naphthylamine derivatives (for example US Pat. No. 4,209,302, WO 95/07460 A1).
  • aniline derivatives for example WO 94/11466 A1
  • naphthylamine derivatives for example US Pat. No. 4,209,302, WO 95/07460 A1
  • WO 02/50216 A2 discloses, inter alia, aromatic carbonyl compounds as marker materials which are detected by UV spectroscopy. With the aid of the process according to the invention, the detection of these compounds in much lower concentrations becomes possible.
  • FIG. 1 describes, by way of example, the schematic experimental setup based on seven wavelength base values corresponding to seven light-emitting diodes ("1" to "7" in the block "light-emitting diode rows”).
  • the radiation of the individual light-emitting diodes is optionally coupled via light guides into a 1 cm cuvette.
  • the transmitted or emitted light (fluorescence or phosphorescence) is detected in the detectors 1 or 2 (silicon diodes).
  • the detector signals are evaluated by means of correlation electronics and, as described above, checked for identity or non-identity.
  • the light emitting diodes of the LED array showed the following emission wavelengths in nm: LED 1: 600
  • the power of the LEDs was in the range of 1 to 10 mW.
  • the spectral position of the radiation emitted by the individual light-emitting diodes relative to the absorption spectrum of the anthraquinone dye according to Example 1 is shown schematically in FIG. 2 on the basis of the triangles shown, with the ordinate values not being specified further.
  • the anthraquinone dye according to Example 1 was dissolved in toluene in the following concentrations:
  • the method according to the invention thus permits the determination of much lower concentrations of this compound than a conventional spectroscopic measurement.
  • FIGS. 5a to 5e show the absorption spectra obtained on a dilution series of a cationic cyanine dye.
  • the abscissa value range corresponds to that in FIG. 5a. Therefore, the abscissa description was omitted in the former.
  • FIGS. 6a to 6e show the correlation functions corresponding to the spectra 5a to 5e. Since in FIGS. 6b to 6e the ordinate and abscissa value ranges correspond to those in FIG. 5a, the axis labels have been left in the former.
  • the correlation values K ( ⁇ , c ' , c) are in the range of about -0.001 to about 0.001, but can be transformed into any other range of values, for example from 0 to 1, by shifting parallel to the ordinate and changing the scale.

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
EP05761631A 2004-07-23 2005-07-19 Verfahren zur bestimmung des vorhandenseins einer in einem medium homogen verteilten chemischen verbindung mittels kreuzkorrelation eines messpektrums mit referenzspektren Withdrawn EP1774321A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004035948A DE102004035948A1 (de) 2004-07-23 2004-07-23 Verfahren zur Bestimmung der Identität oder Nicht-Identität mindestens einer in einem Medium homogen verteilten chemischen Verbindung
PCT/EP2005/007839 WO2006010527A1 (de) 2004-07-23 2005-07-19 Verfahren zur bestimmung des vorhandenseins einer in einem medium homogen verteilten chemischen verbindung mittels kreuzkorrelation eines messspektrums mit referenzspektren

Publications (1)

Publication Number Publication Date
EP1774321A1 true EP1774321A1 (de) 2007-04-18

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EP05761631A Withdrawn EP1774321A1 (de) 2004-07-23 2005-07-19 Verfahren zur bestimmung des vorhandenseins einer in einem medium homogen verteilten chemischen verbindung mittels kreuzkorrelation eines messpektrums mit referenzspektren

Country Status (18)

Country Link
US (1) US20080057589A1 (pt)
EP (1) EP1774321A1 (pt)
JP (1) JP2008507685A (pt)
KR (1) KR20070039602A (pt)
CN (1) CN1989408A (pt)
AR (1) AR050008A1 (pt)
AU (1) AU2005266512A1 (pt)
BR (1) BRPI0513585A (pt)
CA (1) CA2574663A1 (pt)
DE (1) DE102004035948A1 (pt)
IL (1) IL180179A0 (pt)
MX (1) MX2007000068A (pt)
NO (1) NO20070722L (pt)
NZ (1) NZ552904A (pt)
PE (1) PE20060538A1 (pt)
TW (1) TW200612086A (pt)
WO (1) WO2006010527A1 (pt)
ZA (1) ZA200701517B (pt)

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EA201000526A1 (ru) * 2007-10-11 2010-12-30 Басф Се Спектрометр со светодиодной матрицей
CN101868433A (zh) * 2007-11-21 2010-10-20 巴斯夫欧洲公司 标记材料的氘化
ATE545014T1 (de) * 2009-04-30 2012-02-15 Hoffmann La Roche Verfahren zur detektion von verunreinigungen einer optischen messküvette
JP7386444B2 (ja) * 2019-05-17 2023-11-27 パナソニックＩｐマネジメント株式会社 ラマン分光スペクトル解析装置及びラマン分光スペクトル解析方法

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Also Published As

Publication number Publication date
BRPI0513585A (pt) 2008-05-13
KR20070039602A (ko) 2007-04-12
ZA200701517B (en) 2008-12-31
WO2006010527A1 (de) 2006-02-02
AU2005266512A1 (en) 2006-02-02
TW200612086A (en) 2006-04-16
IL180179A0 (en) 2007-06-03
MX2007000068A (es) 2007-03-28
CA2574663A1 (en) 2006-02-02
PE20060538A1 (es) 2006-07-04
NZ552904A (en) 2009-10-30
CN1989408A (zh) 2007-06-27
NO20070722L (no) 2007-04-18
JP2008507685A (ja) 2008-03-13
US20080057589A1 (en) 2008-03-06
AR050008A1 (es) 2006-09-20
DE102004035948A1 (de) 2006-03-16

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