WO2017009530A1 - Method and apparatus for optical emission spectroscopy of fluids - Google Patents

Method and apparatus for optical emission spectroscopy of fluids Download PDF

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Publication number
WO2017009530A1
WO2017009530A1 PCT/FI2016/050506 FI2016050506W WO2017009530A1 WO 2017009530 A1 WO2017009530 A1 WO 2017009530A1 FI 2016050506 W FI2016050506 W FI 2016050506W WO 2017009530 A1 WO2017009530 A1 WO 2017009530A1
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WO
WIPO (PCT)
Prior art keywords
protective wall
flow
aperture
fluid sample
conduit
Prior art date
Application number
PCT/FI2016/050506
Other languages
French (fr)
Inventor
Mika Salonen
Lauri KÖRESAAR
Kari Saloheimo
Pasi HIETARINTA
Arto OLLIKAINEN
Original Assignee
Outotec (Finland) Oy
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 Outotec (Finland) Oy filed Critical Outotec (Finland) Oy
Priority to CN201690001075.4U priority Critical patent/CN208060392U/en
Priority to BR202018000575-3U priority patent/BR202018000575Y1/en
Priority to BR112018000575A priority patent/BR112018000575A2/en
Priority to RU2018103086U priority patent/RU183436U1/en
Priority to AU2016294458A priority patent/AU2016294458A1/en
Publication of WO2017009530A1 publication Critical patent/WO2017009530A1/en
Priority to FIU20184019U priority patent/FI12042U1/en

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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
    • G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
    • G01N21/718—Laser microanalysis, i.e. with formation of sample plasma
    • 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
    • G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
    • 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
    • G01N21/66—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light electrically excited, e.g. electroluminescence
    • G01N21/67—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light electrically excited, e.g. electroluminescence using electric arcs or discharges
    • 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
    • G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
    • G01N2021/151—Gas blown
    • 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
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/85—Investigating moving fluids or granular solids
    • G01N2021/8592—Grain or other flowing solid samples

Definitions

  • the invention relates to a method for optical emission spectroscopy of fluids as defined in the preamble of independent claim 1.
  • the invention also relates to an apparatus for optical emission spectroscopy of fluids as defined in the preamble of independent claim 24.
  • Atomic/optical emission spectroscopy is a method to measure the presence or quantity of an element in a sample.
  • a source for electromagnetic energy such as a laser
  • plasma is induced in the sample and electrons in an element are excited to a higher level, and as the electrons decay back to a lower energy level they emit photons at a characteristic wavelength.
  • Light i.e. photons emitted by the plasma are received and analyzed in a spectroscopy system.
  • the wavelength is proportional to the energy difference between the exited state and the state it decays to.
  • the measured intensity is proportional to the concentration of the measured element in the plasma, the atomic parameters of the measured transition including the transition probability and the energy of the excited state, and parameter of the plasma including electron density and temperature.
  • Atomic/optical emission spectroscopy can for example be used for to measure the presence or quantity of an element / elements in a fluid sample flow.
  • a problem with optical emission spectroscopy of fluids is that the plasma causes particle to detach from the surface of the sample flow in a hemispherical formation i.e. towards the source for electromagnetic energy and towards the spectroscopy system. The more electromagnetic energy that is used, the more particles detach from the surface of the sample flow.
  • a solution to this problem is to blow gas against the surface of the sample flow to at least partly prevent detaching of particles from the surface of the sample flow.
  • a problem with blowing gas against the surface of the sample flow is however that the blown gas form waves is formed on the surface of the sample flow and that the blown gas causes the surface of the sample flow to vibrate.
  • the object of the invention is to provide a method and an apparatus for optical emission spectroscopy of fluids which solves the above-identified problem.
  • Preferred embodiments of the apparatus are defined in the dependent claims 25 to 46.
  • the purpose of the protective wall is to protect the spectroscopy system from fluid of the fluid sample flow.
  • the purpose of the protective wall may be to protect the source of electromagnetic energy and the spectroscopy system from fluid of the fluid sample flow.
  • Figure 1 shows a part of a first embodiment of an apparatus for optical emission spectroscopy of fluids
  • Figure 2 shows a part of a second embodiment of an apparatus for optical emission spectroscopy of fluids
  • Figure 3 shows a part of a third embodiment of an apparatus for optical emission spectroscopy of fluids
  • Figure 4 shows in cut side view a detail of an embodiment of an apparatus optical emission spectroscopy of fluids
  • Figure 5 shows in cut side view a detail of an embodiment of an apparatus optical emission spectroscopy of fluids
  • Figure 6 shows in cut side view a detail of an embodiment of an apparatus optical emission spectroscopy of fluids
  • Figure 7 shows an embodiment of an apparatus for optical emission spectroscopy of fluids
  • the invention relates to a method for optical emission spectroscopy of fluids and to an apparatus for optical emission spectroscopy of fluids.
  • the method can for example be implemented in Inductively Coupled Plasma optical emission spectrophotometer (ICP-OES) apparatuses and in Arc spark OES apparatuses.
  • ICP-OES Inductively Coupled Plasma optical emission spectrophotometer
  • the apparatus can be a Inductively Coupled Plasma optical emission spectrophotometer (ICP-OES) apparatus or an Arc spark OES apparatus.
  • ICP-OES Inductively Coupled Plasma optical emission spectrophotometer
  • Arc spark OES Arc spark OES
  • the method comprises conducting a fluid sample flow 1 through a flow cell 2.
  • the method comprises applying electromagnetic energy 3 from a source 4 for electromagnetic energy onto a surface 5 of the fluid sample flow 1 that flows through the flow cell to induce plasma 6 in the fluid sample flow 1 that flows through the flow cell 2.
  • the method comprises receiving light 7 emitted by the plasma 6 and analyzing light 7 emitted by the plasma 6 in a spectrometer 8 of a spectroscopy system 9.
  • the method comprises providing a protective wall 10 between the fluid sample flow 1 that flows through the flow cell 2 and the spectrometer 8 of the spectroscopy system 9 so that an interspace is formed between the protective wall 10 and the fluid sample flow 1 that flows through the flow cell 2, and
  • the method comprises providing the protective wall 10 with an aperture 11 for allowing light 7 emitted by the plasma 6 to pass through the protective wall 10.
  • the method may include providing the protective wall 10 so that the protective wall 10 has a first side 12 that faces the fluid sample flow 1 that flows through the flow cell 2.
  • the diameter of the aperture 11 at the first side 12 of the protective wall 10 can be between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
  • the method may include providing the protective wall 10 so that the protective wall 10 has a second side 13 that turned away from the fluid sample flow 1 that flows through the flow cell 2.
  • the method may include providing the protective wall 10 so that the first side 12 is planar and so that the second side 13 is planar and so that the first side 12 and the second side 13 are parallel.
  • the distance between the first side 12 and the second side 13 may for example be between 0.5 and 20 mm.
  • the flow cell 2 that is used in the method may comprise a vertical stabilizer surface 14 that faces the protective wall 10, and the protective wall 10 may be provided so that the horizontal distance between the first side 12 of the protective wall 10 and the vertical stabilizer surface 14 is between 20 and 40mm, preferably between 25 and 35 mm, for example 28 mm.
  • the method may include blowing gas 15 against the second side 13 of the protective wall
  • the method may include blowing gas 15 against the second side 13 of the protective wall 10 so that gas 15 passes through the aperture 11 in the protective wall 10.
  • the aperture 11 that is formed in the protective wall 10 having a conical or tapering configuration that tapers towards the first side 12 of the protective wall 10 so that the diameter of the aperture 11 at the first side 12 of the protective wall 10 can be between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
  • the aperture 11 that is formed in the protective wall 10 may have inner surface 24 inclined by an angle B between 5 and 15° with respect to a central axis A of the aperture 11.
  • the aperture 11 that is formed in the protective wall 10 may have a circular cross section.
  • the aperture 11 that is formed in the protective wall 10 may have at least partly the shape of a parabolic cone.
  • the aperture 11 that is formed in the protective wall 10 may have at least partly the shape of a hyperbolic cone.
  • the aperture 11 that is formed in the protective wall 10 may have a circular cross section and a diameter between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
  • the method may include providing a protective wall 10 comprising polymer, such as polytetraiiuoroethylene (PFTE) .
  • PFTE polytetraiiuoroethylene
  • the source 4 for electromagnetic energy 3 and the spectrometer 8 of the spectroscopy system 9 may be separated from the flow cell 2 by means of a window 21 and the protective wall 10 may be provided between the fluid sample and the window 21, as is shown in figures 1 and 3.
  • the spectrometer 8 of the spectroscopy system 9 may be separated from the flow cell 2 by means of a window 21 and the protective wall 10 may be provided between the fluid sample and the window 21, as is shown in figure 1.
  • the method may include conducting light 7 from the plasma 6 to the spectrometer 8 of the spectroscopy system 9 in gas.
  • the method may include conducting light 7 from the plasma 6 to the spectrometer 8 of the spectroscopy system 9 in vacuum.
  • the method may include conducting light 7 emitted from the plasma 6 to the spectrometer 8 of the spectroscopy system 9 without using optical fibers.
  • the method may include using as the source 4 for electromagnetic energy 4 any one of the following: a laser such as a Nd:YAG laser, as in figure 1, and an arc spark generator, as in figure 2.
  • a laser such as a Nd:YAG laser, as in figure 1
  • an arc spark generator as in figure 2.
  • the method may include, as shown in figures 1 and 2, conducting a fluid flow 22 in a conduit 17 having an inclined conduit section 18, separating by means of separation element 20 arranged at an outlet 19 in the inclined conduit section 18 of the conduit 17 a portion of the fluid flow 22 flowing in the inclined conduit section 18 of the conduit 17 to generate the fluid sample flow 1, and conducting the fluid sample flow 1 from the separation element 20 to the flow cell 2.
  • the method may include, as shown in figure 3, conducting a fluid flow 22 in a conduit 17 having an inclined conduit section 18, conducting the fluid flow 22 from an outlet 19 of the inclined conduit section 18 of the conduit 17 against a vertical wall member 23 to from the fluid sample flow 1, and conducting the fluid sample flow 1 along the vertical wall member 23 to the flow cell 2.
  • the method may include, as shown in figure 1, providing the aperture 11 in the protective wall 10 to additionally allowing electromagnetic energy 3 generated by the source 4 for electromagnetic energy to pass through the protective wall 10.
  • the apparatus comprises a flow cell 2 configured to receive and release a fluid sample flow 1 so that the fluid sample flow 1 flows through the flow cell 2.
  • the apparatus comprises a source 4 for electromagnetic energy for applying electromagnetic energy 3 onto a surface 5 of the fluid sample flow 1 that flows through the flow cell 2 to induce plasma 6 in the fluid sample flow 1 that flows through the flow cell 2.
  • the apparatus comprises a spectroscopy system 9 comprising a spectrometer 8 for receiving light 7 emitted by the plasma 6 and for analyzing light 7 emitted by the plasma 6.
  • the apparatus comprises by a protective wall 10 between the fluid sample flow 1 that flows through the flow cell 2 and the spectrometer 8 of the spectroscopy system 9 so that an interspace is formed between the protective wall 10 and the fluid sample flow 1 that flows through the flow cell 2.
  • the protective wall 10 comprises an aperture 11 for allowing light 7 emitted by the plasma 6 to pass through the protective wall 10.
  • the protective wall 10 may have a first side 12 that faces the fluid sample flow 1 that flows through the flow cell 2.
  • the diameter of the aperture 11 at the first side 12 of the protective wall 10 can be between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
  • the protective wall 10 may have a second side 13 that turned away from the fluid sample flow 1 that flows through the flow cell 2.
  • the first side 12 may be planar and by the second side 13 may be planar, and the first side 12 and the second side 13 may be parallel.
  • the flow cell 2 may comprising a vertical stabilizer surface 14 that faces the protective wall 10, and the horizontal distance between the first side 12 of the protective wall 10 and the vertical stabilizer surface 14 being between 20 and 40mm, preferably between 25 and 35 mm, for example 28 mm.
  • the vertical stabilizer surface 14 and the first side 12 of the protective wall 10 that faces the fluid sample flow 1 that flows through the flow cell 2 may be parallel.
  • the distance between the first side 12 and the second side 13 may for example be between 0.5 and 20 mm.
  • the apparatus may comprise gas blowing means 16 configured to blow gas 15 against the second side 13 of the protective wall 10.
  • the gas blowing means 16 may be configured to blow gas 15 against the second side 13 of the protective wall 10 so that gas 15 passes thorough the aperture 11 in the protective wall 10.
  • the aperture 11 in the protective wall 10 may have a conical or tapering configuration that tapers towards the first side 12 of the protective wall 10, as shown in figure 5.
  • the diameter of the aperture 11 at the first side 12 of the protective wall 10 can be between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
  • An inner surface 24 of the aperture 11 may be inclined by an angle B between 5 and 15° with respect to a central axis A of the aperture 11.
  • the aperture 11 in the protective wall 10 may have a circular cross section and a cylindrical configuration, as shown in figure 4.
  • the aperture 11 in the protective wall 10 may have a circular cross section and a diameter between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
  • the aperture 11 in the protective wall 10 can have at least partly the shape of a parabolic cone.
  • the aperture 11 in the protective wall 10 can have at least partly the shape of a hyperbolic cone.
  • the protective wall 10 may comprise polymer, such as polytetrafluoroethylene (PFTE).
  • PFTE polytetrafluoroethylene
  • the source 4 for electromagnetic energy and the spectrometer 8 of the spectroscopy system 9 may be separated from the flow cell 2 by means of a window 21 and the protective wall 10 may be provided between the fluid sample and the window 21, as shown in figures 1 and 3.
  • the spectrometer 8 of the spectroscopy system 9 may be separated from the flow cell 2 by means of a window 21 and the protective wall 10 may be provided between the fluid sample and the window 21, as shown in figure 2.
  • the apparatus may be configured to conduct light 7 emitted the plasma 6 to the spectrometer 8 of the spectroscopy system 9 in gas.
  • the apparatus may be configured to conduct light 7 emitted the plasma 6 to the spectrometer 8 of the spectroscopy system 9 in vacuum.
  • the apparatus may be configured to conduct light 7 emitted the plasma 6 to the spectrometer 8 of the spectroscopy system 9 without using optical fibers.
  • the source 4 for electromagnetic energy being any one of the following: a laser such as a
  • Nd:YAG laser as in figure 1
  • an arc spark generator as in figure 2.
  • the apparatus may comprise, as shown in figures 1 and 2, a conduit 17 configured to conduct a fluid flow 22, wherein the conduit 17 having an inclined conduit section 18, wherein the conduit 17 limits a flow channel for the fluid flow 22, and the apparatus may comprise a separation element 20 arranged at an outlet 19 in the inclined conduit section 18 of the conduit 17 for separating a portion of the fluid flow 22 flowing in the inclined conduit section 18 of the conduit 17 to generate the fluid sample flow 1, wherein the flow cell 2 being fluid connection with the separation element 20.
  • the apparatus may comprise, as shown in figure 3, a conduit 17 configured to conduct a fluid flow 22, wherein the conduit 17 having an inclined conduit section 18, wherein the conduit 17 limits a flow channel for the fluid flow 22, an outlet 19 in the inclined conduit section 18 of the conduit 17, and a vertical wall member 23 at the outlet 19 of the inclined conduit section 18 of the conduit 17.
  • the fluid flow 22 is configured to be conducted against the vertical wall member 23 from the outlet 19 of the inclined conduit section 18 of the conduit 17 to generate the fluid sample flow 1
  • the vertical wall member 23 is configured to conduct the fluid sample flow 1 along the vertical wall member 23 to the flow cell 2.
  • the aperture 11 in the protective wall 10 may be configured to allow electromagnetic energy 3 generated by the source 4 for electromagnetic energy to pass through the protective wall 10.

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Abstract

The invention relates to a method and to an apparatus for optical emission spectroscopy of fluids. The method comprises conducting a fluid sample flow (1) through a flow cell (2), applying electromagnetic energy (3) onto a surface (5) of the fluid sample flow (1) to induce plasma (6) in the fluid sample flow (1), and receiving light (7) emitted by the plasma (6) and analyzing light (7) emitted by the plasma (6) in a spectrometer (8) of a spectroscopy system (9). The method comprises providing a protective wall (10) between the fluid sample flow (1) and the spectrometer (8) of the spectroscopy system (9) so that an interspace is formed between the protective wall (10) and the fluid sample flow (1), and providing the protective wall (10) with an aperture (11) for allowing light (7) emitted by the plasma (6) to pass through the protective wall (10).

Description

METHOD AND APPARATUS FOR OPTICAL EMISSION SPECTROSCOPY OF FLUIDS
Field of the invention
The invention relates to a method for optical emission spectroscopy of fluids as defined in the preamble of independent claim 1.
The invention also relates to an apparatus for optical emission spectroscopy of fluids as defined in the preamble of independent claim 24.
Atomic/optical emission spectroscopy is a method to measure the presence or quantity of an element in a sample. By means of a source for electromagnetic energy such as a laser, plasma is induced in the sample and electrons in an element are excited to a higher level, and as the electrons decay back to a lower energy level they emit photons at a characteristic wavelength. Light i.e. photons emitted by the plasma are received and analyzed in a spectroscopy system. The wavelength is proportional to the energy difference between the exited state and the state it decays to. The measured intensity is proportional to the concentration of the measured element in the plasma, the atomic parameters of the measured transition including the transition probability and the energy of the excited state, and parameter of the plasma including electron density and temperature.
Atomic/optical emission spectroscopy can for example be used for to measure the presence or quantity of an element / elements in a fluid sample flow.
A problem with optical emission spectroscopy of fluids is that the plasma causes particle to detach from the surface of the sample flow in a hemispherical formation i.e. towards the source for electromagnetic energy and towards the spectroscopy system. The more electromagnetic energy that is used, the more particles detach from the surface of the sample flow. A solution to this problem is to blow gas against the surface of the sample flow to at least partly prevent detaching of particles from the surface of the sample flow. A problem with blowing gas against the surface of the sample flow is however that the blown gas form waves is formed on the surface of the sample flow and that the blown gas causes the surface of the sample flow to vibrate.
Objective of the invention
The object of the invention is to provide a method and an apparatus for optical emission spectroscopy of fluids which solves the above-identified problem.
Short description of the invention
The method for optical emission spectroscopy of fluids of the invention is characterized by the definitions of independent claim 1.
Preferred embodiments of the method are defined in the dependent claims 2 to 23. The apparatus for optical emission spectroscopy of fluids of the invention is correspondingly characterized by the definitions of independent claim 24.
Preferred embodiments of the apparatus are defined in the dependent claims 25 to 46. The purpose of the protective wall is to protect the spectroscopy system from fluid of the fluid sample flow.
The purpose of the protective wall may be to protect the source of electromagnetic energy and the spectroscopy system from fluid of the fluid sample flow.
List of figures
In the following the invention will described in more detail by referring to the figures, of which
Figure 1 shows a part of a first embodiment of an apparatus for optical emission spectroscopy of fluids,
Figure 2 shows a part of a second embodiment of an apparatus for optical emission spectroscopy of fluids,
Figure 3 shows a part of a third embodiment of an apparatus for optical emission spectroscopy of fluids,
Figure 4 shows in cut side view a detail of an embodiment of an apparatus optical emission spectroscopy of fluids,
Figure 5 shows in cut side view a detail of an embodiment of an apparatus optical emission spectroscopy of fluids,
Figure 6 shows in cut side view a detail of an embodiment of an apparatus optical emission spectroscopy of fluids, and
Figure 7 shows an embodiment of an apparatus for optical emission spectroscopy of fluids
Detailed description of the invention
The invention relates to a method for optical emission spectroscopy of fluids and to an apparatus for optical emission spectroscopy of fluids.
The method can for example be implemented in Inductively Coupled Plasma optical emission spectrophotometer (ICP-OES) apparatuses and in Arc spark OES apparatuses.
Correspondingly, the apparatus can be a Inductively Coupled Plasma optical emission spectrophotometer (ICP-OES) apparatus or an Arc spark OES apparatus.
First the method for optical emission spectroscopy of fluids and some embodiments and variants of the method will be described in greater detail.
The method comprises conducting a fluid sample flow 1 through a flow cell 2.
The method comprises applying electromagnetic energy 3 from a source 4 for electromagnetic energy onto a surface 5 of the fluid sample flow 1 that flows through the flow cell to induce plasma 6 in the fluid sample flow 1 that flows through the flow cell 2.
The method comprises receiving light 7 emitted by the plasma 6 and analyzing light 7 emitted by the plasma 6 in a spectrometer 8 of a spectroscopy system 9.
The method comprises providing a protective wall 10 between the fluid sample flow 1 that flows through the flow cell 2 and the spectrometer 8 of the spectroscopy system 9 so that an interspace is formed between the protective wall 10 and the fluid sample flow 1 that flows through the flow cell 2, and
The method comprises providing the protective wall 10 with an aperture 11 for allowing light 7 emitted by the plasma 6 to pass through the protective wall 10.
The method may include providing the protective wall 10 so that the protective wall 10 has a first side 12 that faces the fluid sample flow 1 that flows through the flow cell 2. The diameter of the aperture 11 at the first side 12 of the protective wall 10 can be between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
The method may include providing the protective wall 10 so that the protective wall 10 has a second side 13 that turned away from the fluid sample flow 1 that flows through the flow cell 2.
The method may include providing the protective wall 10 so that the first side 12 is planar and so that the second side 13 is planar and so that the first side 12 and the second side 13 are parallel. The distance between the first side 12 and the second side 13 may for example be between 0.5 and 20 mm.
The flow cell 2 that is used in the method may comprise a vertical stabilizer surface 14 that faces the protective wall 10, and the protective wall 10 may be provided so that the horizontal distance between the first side 12 of the protective wall 10 and the vertical stabilizer surface 14 is between 20 and 40mm, preferably between 25 and 35 mm, for example 28 mm.
The method may include blowing gas 15 against the second side 13 of the protective wall
10.
The method may include blowing gas 15 against the second side 13 of the protective wall 10 so that gas 15 passes through the aperture 11 in the protective wall 10.
The aperture 11 that is formed in the protective wall 10 having a conical or tapering configuration that tapers towards the first side 12 of the protective wall 10 so that the diameter of the aperture 11 at the first side 12 of the protective wall 10 can be between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm. The aperture 11 that is formed in the protective wall 10 may have inner surface 24 inclined by an angle B between 5 and 15° with respect to a central axis A of the aperture 11.
The aperture 11 that is formed in the protective wall 10 may have a circular cross section.
The aperture 11 that is formed in the protective wall 10 may have at least partly the shape of a parabolic cone. The aperture 11 that is formed in the protective wall 10 may have at least partly the shape of a hyperbolic cone.
The aperture 11 that is formed in the protective wall 10 may have a circular cross section and a diameter between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
The method may include providing a protective wall 10 comprising polymer, such as polytetraiiuoroethylene (PFTE) .
In the method, the source 4 for electromagnetic energy 3 and the spectrometer 8 of the spectroscopy system 9 may be separated from the flow cell 2 by means of a window 21 and the protective wall 10 may be provided between the fluid sample and the window 21, as is shown in figures 1 and 3.
In the method, the spectrometer 8 of the spectroscopy system 9 may be separated from the flow cell 2 by means of a window 21 and the protective wall 10 may be provided between the fluid sample and the window 21, as is shown in figure 1.
The method may include conducting light 7 from the plasma 6 to the spectrometer 8 of the spectroscopy system 9 in gas.
The method may include conducting light 7 from the plasma 6 to the spectrometer 8 of the spectroscopy system 9 in vacuum.
The method may include conducting light 7 emitted from the plasma 6 to the spectrometer 8 of the spectroscopy system 9 without using optical fibers.
The method may include using as the source 4 for electromagnetic energy 4 any one of the following: a laser such as a Nd:YAG laser, as in figure 1, and an arc spark generator, as in figure 2.
The method may include, as shown in figures 1 and 2, conducting a fluid flow 22 in a conduit 17 having an inclined conduit section 18, separating by means of separation element 20 arranged at an outlet 19 in the inclined conduit section 18 of the conduit 17 a portion of the fluid flow 22 flowing in the inclined conduit section 18 of the conduit 17 to generate the fluid sample flow 1, and conducting the fluid sample flow 1 from the separation element 20 to the flow cell 2.
The method may include, as shown in figure 3, conducting a fluid flow 22 in a conduit 17 having an inclined conduit section 18, conducting the fluid flow 22 from an outlet 19 of the inclined conduit section 18 of the conduit 17 against a vertical wall member 23 to from the fluid sample flow 1, and conducting the fluid sample flow 1 along the vertical wall member 23 to the flow cell 2.
The method may include, as shown in figure 1, providing the aperture 11 in the protective wall 10 to additionally allowing electromagnetic energy 3 generated by the source 4 for electromagnetic energy to pass through the protective wall 10.
Next the apparatus for optical emission spectroscopy of fluids and some embodiments and variants of the apparatus will be described in greater detail. The apparatus comprises a flow cell 2 configured to receive and release a fluid sample flow 1 so that the fluid sample flow 1 flows through the flow cell 2.
The apparatus comprises a source 4 for electromagnetic energy for applying electromagnetic energy 3 onto a surface 5 of the fluid sample flow 1 that flows through the flow cell 2 to induce plasma 6 in the fluid sample flow 1 that flows through the flow cell 2.
The apparatus comprises a spectroscopy system 9 comprising a spectrometer 8 for receiving light 7 emitted by the plasma 6 and for analyzing light 7 emitted by the plasma 6.
The apparatus comprises by a protective wall 10 between the fluid sample flow 1 that flows through the flow cell 2 and the spectrometer 8 of the spectroscopy system 9 so that an interspace is formed between the protective wall 10 and the fluid sample flow 1 that flows through the flow cell 2.
The protective wall 10 comprises an aperture 11 for allowing light 7 emitted by the plasma 6 to pass through the protective wall 10.
The protective wall 10 may have a first side 12 that faces the fluid sample flow 1 that flows through the flow cell 2. The diameter of the aperture 11 at the first side 12 of the protective wall 10 can be between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
The protective wall 10 may have a second side 13 that turned away from the fluid sample flow 1 that flows through the flow cell 2.
The first side 12 may be planar and by the second side 13 may be planar, and the first side 12 and the second side 13 may be parallel.
The flow cell 2 may comprising a vertical stabilizer surface 14 that faces the protective wall 10, and the horizontal distance between the first side 12 of the protective wall 10 and the vertical stabilizer surface 14 being between 20 and 40mm, preferably between 25 and 35 mm, for example 28 mm.
The vertical stabilizer surface 14 and the first side 12 of the protective wall 10 that faces the fluid sample flow 1 that flows through the flow cell 2 may be parallel. The distance between the first side 12 and the second side 13 may for example be between 0.5 and 20 mm.
The apparatus may comprise gas blowing means 16 configured to blow gas 15 against the second side 13 of the protective wall 10. The gas blowing means 16 may be configured to blow gas 15 against the second side 13 of the protective wall 10 so that gas 15 passes thorough the aperture 11 in the protective wall 10.
The aperture 11 in the protective wall 10 may have a conical or tapering configuration that tapers towards the first side 12 of the protective wall 10, as shown in figure 5. The diameter of the aperture 11 at the first side 12 of the protective wall 10 can be between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm. An inner surface 24 of the aperture 11 may be inclined by an angle B between 5 and 15° with respect to a central axis A of the aperture 11.
The aperture 11 in the protective wall 10 may have a circular cross section and a cylindrical configuration, as shown in figure 4. The aperture 11 in the protective wall 10 may have a circular cross section and a diameter between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
The aperture 11 in the protective wall 10 can have at least partly the shape of a parabolic cone.
The aperture 11 in the protective wall 10 can have at least partly the shape of a hyperbolic cone.
The protective wall 10 may comprise polymer, such as polytetrafluoroethylene (PFTE).
The source 4 for electromagnetic energy and the spectrometer 8 of the spectroscopy system 9 may be separated from the flow cell 2 by means of a window 21 and the protective wall 10 may be provided between the fluid sample and the window 21, as shown in figures 1 and 3.
The spectrometer 8 of the spectroscopy system 9 may be separated from the flow cell 2 by means of a window 21 and the protective wall 10 may be provided between the fluid sample and the window 21, as shown in figure 2.
The apparatus may be configured to conduct light 7 emitted the plasma 6 to the spectrometer 8 of the spectroscopy system 9 in gas.
The apparatus may be configured to conduct light 7 emitted the plasma 6 to the spectrometer 8 of the spectroscopy system 9 in vacuum.
The apparatus may be configured to conduct light 7 emitted the plasma 6 to the spectrometer 8 of the spectroscopy system 9 without using optical fibers.
The source 4 for electromagnetic energy being any one of the following: a laser such as a
Nd:YAG laser, as in figure 1, and an arc spark generator, as in figure 2.
The apparatus may comprise, as shown in figures 1 and 2, a conduit 17 configured to conduct a fluid flow 22, wherein the conduit 17 having an inclined conduit section 18, wherein the conduit 17 limits a flow channel for the fluid flow 22, and the apparatus may comprise a separation element 20 arranged at an outlet 19 in the inclined conduit section 18 of the conduit 17 for separating a portion of the fluid flow 22 flowing in the inclined conduit section 18 of the conduit 17 to generate the fluid sample flow 1, wherein the flow cell 2 being fluid connection with the separation element 20.
The apparatus may comprise, as shown in figure 3, a conduit 17 configured to conduct a fluid flow 22, wherein the conduit 17 having an inclined conduit section 18, wherein the conduit 17 limits a flow channel for the fluid flow 22, an outlet 19 in the inclined conduit section 18 of the conduit 17, and a vertical wall member 23 at the outlet 19 of the inclined conduit section 18 of the conduit 17. In such case, the fluid flow 22 is configured to be conducted against the vertical wall member 23 from the outlet 19 of the inclined conduit section 18 of the conduit 17 to generate the fluid sample flow 1, and the vertical wall member 23 is configured to conduct the fluid sample flow 1 along the vertical wall member 23 to the flow cell 2.
The aperture 11 in the protective wall 10 may be configured to allow electromagnetic energy 3 generated by the source 4 for electromagnetic energy to pass through the protective wall 10.
It is apparent to a person skilled in the art that as technology advances, the basic idea of the invention can be implemented in various ways. The invention and its embodiments are therefore not restricted to the above examples, but they may vary within the scope of the claims.

Claims

Claims
1. A method for optical emission spectroscopy of fluids, comprising
conducting a fluid sample flow (1) through a flow cell (2),
applying electromagnetic energy (3) from a source (4) for electromagnetic energy onto a surface (5) of the fluid sample flow (1) that flows through the flow cell (2) to induce plasma (6) in the fluid sample flow (1) that flows through the flow cell (2), and
receiving light (7) emitted by the plasma (6) and analyzing light (7) emitted by the plasma (6) in a spectrometer (8) of a spectroscopy system (9),
characterized
by providing a protective wall (10) between the fluid sample flow (1) that flows through the flow cell (2) and the spectrometer (8) of the spectroscopy system (9) so that an interspace is formed between the protective wall (10) and the fluid sample flow (1) that flows through the flow cell (2), and
by providing the protective wall (10) with an aperture (11) for allowing light (7) emitted by the plasma (6) to pass through the protective wall (10).
2. The method according to claim 1, characterized
by providing the protective wall (10) so that the protective wall (10) has a first side (12) that faces the fluid sample flow (1) that flows through the flow cell (2).
3. The method according to claim 2, characterized
by providing the protective wall (10) so that the protective wall (10) has a second side (13) that turned away from the fluid sample flow (1) that flows through the flow cell (2).
4. The method according to claim 3, characterized
by providing the protective wall (10) so that the first side (12) is planar and so that the second side (13) is planar and so that the first side (12) and the second side (13) are parallel.
5. The method according to any of the claims 2 to 4, characterized
by the flow cell (2) that is used in the method comprising a vertical stabilizer surface (14) that faces the protective wall (10), and
by providing the protective wall (10) so that the horizontal distance between the first side (12) of the protective wall (10) and the vertical stabilizer surface (14) is between 20 and 40mm, preferably between 25 and 35 mm, for example 28 mm.
6. The method according to any of the claims 2 to 5, characterized
by blowing gas (15) against the second side (13) of the protective wall (10).
7. The method according to claim 6, characterized
by blowing gas (15) against the second side (13) of the protective wall (10) so that gas (15) passes through the aperture (11) in the protective wall (10).
8. The method according to any of the claims 2 to 7, characterized
by the aperture (11) that is formed in the protective wall (10) having a conical configuration that tapers towards the first side (12) of the protective wall (10), and
by the diameter of the aperture (11) at the first side (12) of the protective wall (10) being between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
9. The method according to claim 8, characterized
by the aperture (11) that is formed in the protective wall (10) having inner surface (24) inclined by an angle B between 5 and 15° with respect to a central axis A of the aperture (11).
10. The method according to any of the claims 1 to 9, characterized
by the diameter of the aperture (11) at the first side (12) of the protective wall (10) being between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
11. The method according to any of the claims 1 to 10, characterized
by the aperture (11) that is formed in the protective wall (10) having a circular cross section.
12. The method according to any of the claims 1 to 11, characterized
by the aperture (11) that is formed in the protective wall (10) having at least partly the shape of a parabolic cone.
13. The method according to any of the claims 1 to 12, characterized
by the aperture (11) that is formed in the protective wall (10) having at least partly the shape of a hyperbolic cone.
14. The method according to any of the claims 1 to 13, characterized
by the aperture (11) that is formed in the protective wall (10) having a circular cross section and a diameter between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
15. The method according to any of the claims 1 to 14, characterized
by providing a protective wall (10) comprising polymer, such as PolyietrafTuoroethylene PFTE
16. The method according to any of the claims 1 to 15, characterized
by the source (4) for electromagnetic energy and the spectrometer (8) of the spectroscopy system (9) being separated from the flow cell (2) by means of a window (21) and by providing the protective wall (10) between the fluid sample and the window (21).
17. The method according to any of the claims 1 to 16, characterized
by conducting light (7) from the plasma (6) to the spectrometer (8) of the spectroscopy system (9) in gas.
18. The method according to any of the claims 1 to 16, characterized
by conducting light (7) from the plasma (6) to the spectrometer (8) of the spectroscopy system (9) in vacuum.
19. The method according to any of the claims 1 to 16, characterized
by conducting light (7) emitted from the plasma (6) to the spectrometer (8) of the spectroscopy system (9) without using optical fibers.
20. The method according to any of the claims 1 to 19, characterized
by using as the source (4) for electromagnetic energy any one of the following: a laser such as a Nd:YAG laser, and an arc spark generator.
21. The method according to any of the claims 1 to 20, characterized
by conducting a fluid flow (22) in a conduit (17) having an inclined conduit section (18), by separating by means of separation element (20) arranged at an outlet (19) in the inclined conduit section (18) of the conduit (17) a portion of the fluid flow (22) flowing in the inclined conduit section (18) of the conduit (17) to generate the fluid sample flow (1), and
conducting the fluid sample flow (1) from the separation element (20) to the flow cell (2).
22. The method according to any of the claims 1 to 20, characterized
by conducting a fluid flow (22) in a conduit (17) having an inclined conduit section (18), by conducting the fluid flow (22) from an outlet (19) of the inclined conduit section (18) of the conduit (17) against a vertical wall member (23) to from the fluid sample flow (1),
by conducting the fluid sample flow (1) along the vertical wall member (23) to the flow cell (2).
23. The method according to any of the claims 1 to 22, characterized
by providing the aperture (11) in the protective wall (10) to additionally allowing electromagnetic energy (3) generated by the source (4) for electromagnetic energy to pass through the protective wall (10).
24. An apparatus for optical emission spectroscopy of fluids, comprising
a flow cell (2) configured to receive and release a fluid sample flow (1) so that the fluid sample flow (1) flows through the flow cell (2),
a source (4) for electromagnetic energy for applying electromagnetic energy (3) onto a surface (5) of the fluid sample flow (1) that flows through the flow cell (2) to induce plasma (6) in the fluid sample flow (1) that flows through the flow cell (2), and
a spectroscopy system (9) comprising a spectrometer (8) for receiving light (7) emitted by the plasma (6) and for analyzing light (7) emitted by the plasma (6),
characterized
by a protective wall (10) between the fluid sample flow (1) that flows through the flow cell (2) and the spectrometer (8) of the spectroscopy system (9) so that an interspace is formed between the protective wall (10) and the fluid sample flow (1) that flows through the flow cell (2), and
by the protective wall (10) comprising an aperture (11) for allowing light (7) emitted by the plasma (6) to pass through the protective wall (10).
25. The apparatus according to claim 24, characterized
by the protective wall (10) having a first side (12) that faces the fluid sample flow (1) that flows through the flow cell (2).
26. The apparatus according to claim 25, characterized
by the protective wall (10) having a second side (13) that turned away from the fluid sample flow (1) that flows through the flow cell (2).
27. The apparatus according to claim 26, characterized
by the first side (12) being planar and by the second side (13) being planar, and by the first side (12) and the second side (13) being parallel.
28. The apparatus according to any of the claims 25 to 27, characterized
by the flow cell (2) comprising a vertical stabilizer surface (14) that faces the protective wall (10), and
by the horizontal distance between the first side (12) of the protective wall (10) and the vertical stabilizer surface (14) being between 20 and 40mm, preferably between 25 and 35 mm, for example 28 mm.
29. The apparatus according to any of the claims 25 to 28, characterized
by gas blowing means (16) configured to blow gas (15) against the second side (13) of the protective wall (10).
30. The apparatus according to claim 29, characterized
by the gas blowing means (16) being configured to blow gas (15) against the second side (13) of the protective wall (10) so that gas (15) passes thorough the aperture (11) in the protective wall (10).
31. The apparatus according to any of the claims 25 to 30, characterized
by the aperture (11) in the protective wall (10) having a conical configuration that tapers towards the first side (12) of the protective wall (10), and
by the diameter of the aperture (11) at the first side (12) of the protective wall (10) being between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
32. The apparatus according to claim 31, characterized
by an inner surface (24) of the aperture (11) being inclined by an angle B between 5 and 15° with respect to a central axis A of the aperture (11).
33. The apparatus according to any of the claims 25 to 32, characterized
by the diameter of the aperture (11) at the first side (12) of the protective wall (10) being between 5 to 7 mm, such as about 6 mm.
34. The apparatus according to any of the claims 24 to 33, characterized
by the aperture (11) in the protective wall (10) having a circular cross section.
35. The apparatus according to any of the claims 24 to 34, characterized
by the aperture (11) in the protective wall (10) having at least partly the shape of a parabolic cone.
36. The apparatus according to any of the claims 24 to 35, characterized
by the aperture (11 in the protective wall (10) having at least partly the shape of a hyperbolic cone.
37. The apparatus according to any of the claims 24 to 36, characterized
by the aperture (11) in the protective wall (10) having a circular cross section and a diameter between 4 and 9 mm, preferably between 5 to 7 mm, such as about 6 mm.
38. The apparatus according to any of the claims 24 to 37, characterized
by the protective wall (10) comprising polymer, such as PFTE
39. The apparatus according to any of the claims 24 to 38, characterized
by the source (4) for electromagnetic energy and the spectrometer (8) of the spectroscopy system (9) being separated from the flow cell (2) by means of a window (21) and by providing the protective wall (10) between the fluid sample and the window (21).
40. The apparatus according to any of the claims 24 to 39, characterized
by the apparatus being configured to conduct light (7) emitted the plasma (6) to the spectrometer (8) of the spectroscopy system (9) in gas.
41. The apparatus according to any of the claims 24 to 39, characterized
by the apparatus being configured to conduct light (7) emitted the plasma (6) to the spectrometer (8) of the spectroscopy system (9) in vacuum.
42. The apparatus according to any of the claims 24 to 39, characterized
by the apparatus being configured to conduct light (7) emitted the plasma (6) to the spectrometer (8) of the spectroscopy system (9) without using optical fibers.
43. The apparatus according to any of the claims 24 to 42, characterized
by the source (4) for electromagnetic energy being any one of the following: a laser such as a Nd:YAG laser, and an arc spark generator.
44. The apparatus according to any of the claims 24 to 43, characterized
by a conduit (17) configured to conduct a fluid flow (22), wherein the conduit (27) having an inclined conduit section (18), wherein the conduit (17) limits a flow channel for the fluid flow (22),
by a separation element (20) arranged at an outlet (19) in the inclined conduit section (18) of the conduit (17) for separating a portion of the fluid flow (22) flowing in the inclined conduit section (18) of the conduit (17) to generate the fluid sample flow (1), and
by the flow cell (2) being fluid connection with the separation element (20).
45. The apparatus according to any of the claims 24 to 43, characterized
by a conduit (17) configured to conduct a fluid flow (22), wherein the conduit (17) having an inclined conduit section (18), wherein the conduit (17) limits a flow channel for the fluid flow (22),
by the inclined conduit section (18) of the conduit (17) having an outlet (19),
by a vertical wall member (23) at the outlet (19) of the inclined conduit section (18) of the conduit (17),
by the fluid flow (22) being configured to be conducted against the vertical wall member (23) from the outlet (19) of the inclined conduit section (18) of the conduit (17) to generate the fluid sample flow (1), and
by the vertical wall member (23) being configured to conduct the fluid sample flow (1) along the vertical wall member (23) to the flow cell (2).
46. The apparatus according to any of the claims 24 to 45, characterized
by the aperture (11) in the protective wall (10) being configured to allow electromagnetic energy (3) generated by the source (4) for electromagnetic energy to pass through the protective wall (10).
PCT/FI2016/050506 2015-07-10 2016-07-08 Method and apparatus for optical emission spectroscopy of fluids WO2017009530A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN201690001075.4U CN208060392U (en) 2015-07-10 2016-07-08 The emission spectrum equipment of fluid
BR202018000575-3U BR202018000575Y1 (en) 2015-07-10 2016-07-08 APPARATUS FOR FLUID OPTICAL EMISSION SPECTROSCOPY
BR112018000575A BR112018000575A2 (en) 2015-07-10 2016-07-08 method and apparatus for optical emission spectroscopy of fluids
RU2018103086U RU183436U1 (en) 2015-07-10 2016-07-08 Device for optical emission spectroscopy of liquids
AU2016294458A AU2016294458A1 (en) 2015-07-10 2016-07-08 Method and apparatus for optical emission spectroscopy of fluids
FIU20184019U FI12042U1 (en) 2015-07-10 2018-02-05 DEVICE FOR OPTICAL EMISSION SPECTROSCOPY OF THE FLUID

Applications Claiming Priority (2)

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FI20155549 2015-07-10
FI20155549A FI20155549L (en) 2015-07-10 2015-07-10 METHOD AND APPARATUS FOR OPTICAL RADIATION SPECTROSCOPY OF FLUIDS

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FI20155549L (en) 2017-01-11
CN208060392U (en) 2018-11-06
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AU2016102373A4 (en) 2019-05-09
CL2018000072U1 (en) 2018-10-12

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