WO2009120100A1 - An analysis system - Google Patents

An analysis system

Info

Publication number
WO2009120100A1
WO2009120100A1 PCT/NZ2009/000046 NZ2009000046W WO2009120100A1 WO 2009120100 A1 WO2009120100 A1 WO 2009120100A1 NZ 2009000046 W NZ2009000046 W NZ 2009000046W WO 2009120100 A1 WO2009120100 A1 WO 2009120100A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
instrument
base
analysis
sample
system
Prior art date
Application number
PCT/NZ2009/000046
Other languages
French (fr)
Inventor
Lou Reinisch
Steven Todd Churchwell
James Martin Boulton
Robert Brook Hurst
Andrew David Rudge
Original Assignee
Veritide Limited
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

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
    • G01N21/01Arrangements or apparatus for facilitating the optical investigation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
    • G01N21/62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64Fluorescence; Phosphorescence
    • G01N21/6486Measuring fluorescence of biological material, e.g. DNA, RNA, cells
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00Features of devices classified in G01N21/00
    • G01N2201/02Mechanical
    • G01N2201/022Casings
    • G01N2201/0221Portable; cableless; compact; hand-held

Abstract

An analysis system for analysis of a test sample comprises a hand holdable analysis instrument and a separate base, the instrument and base inter-fitting when the instrument is placed on the base to define a closed cavity between an underside of the instrument and the base for analysis of a sample positioned in the closed cavity. For optical analysis the closed cavity may be substantially light-sealed from the environment. The cavity may be defined primarily in the underside of the instrument. The analysis system may also comprise a sample collector for receiving and holding the test sample in the closed cavity when the instrument is placed on the base.

Description

AN ANALYSIS SYSTEM

FIELD OF INVENTION

The invention relates to an analysis system for optical analysis of a test sample, such as for example fluorescence-based analysis of a powdered sample suspected to comprise spores.

BACKGROUND

International patent application publication WO2007/030020 discloses a fluorescence-based method for detecting bacterial spores in a sample. A sample suspected to contain spores is exposed to light of a wavelength e.g. 350nm which will cause any spores present to fluoresce, the fluorescence is assessed, the sample is then exposed to UV light e.g. at 250 nm, and the sample is for a second time exposed to an excitation light e.g. at 350nm. On the second fluorescence assessment any spores present fluoresce with higher intensity than before, and by virtue of this increase in fluorescence intensity spores present in the sample can be detected relative to other particles present which may also exhibit fluorescence but not a fluorescence increase. This is one example of a fluorescence-based analysis technique, in this case for the detection of spores. Other fluorescence- based analysis techniques are known for detection or analysis of spores, bacteria, and other entities.

Raman scattering, reflectance spectroscopy, phosphorescence or other light absorption, emission or scattering techniques are examples of other optical techniques for analysis of a sample.

SUMMARY OF INVENTION

In broad terms the invention comprises an analysis system for analysis of a test sample, comprising a hand holdable analysis instrument and a separate base, the instrument and base inter-fitting when the instrument is placed on the base to define a closed cavity between an underside of the instrument and the base for analysis of a sample positioned in the closed cavity.

In one embodiment the analysis system is for optical analysis of a sample and the closed cavity is substantially light-sealed from the environment external to die instrument and base, and one of the instrument and base comprises one or more optical apertures into the closed cavity The analysis system may also comprise a sample collector for receiving and holding a test sample and retainable by the base or the instrument so that the sample collector or at least a sample holding part thereof is exposed in the closed cavity when the instrument is placed on the base.

The cavity may be defined primarily in the underside of the instrument, and the optical aperture(s) is/are provided through a wall part of an external housing or casing of the instrument which defines in part the cavity.

The term "comprising" as used in this specification means "consisting at least in part of. When interpreting each statement in this specification that includes the term "comprising", features other than that or those prefaced by the term may also be present. Related terms such as "comprise" and "comprises" are to be interpreted in the same manner.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is further illustrated by the following description of an embodiment shown in the drawings in which:

Figure 1 is a perspective view of an analysis instrument on a base,

Figure 2 is a view similar to that of Figure 1 but showing the analysis instrument separated (lifted) from the base,

Figure 3 is a cross-section view of the instrument on the base,

Figure 4 is a plan view of the base with the instrument removed, with a sample collector held in position on the base,

Figure 5 is a plan view of the base similar to that of Figure 4 but without a sample collector in position on the base, and

Figure 6 is a view of the underside of the instrument.

DETAILED DESCRIPTION OF EMBODIMENT

Referring initially to Figures 1 and 2, the embodiment of the analysis system shown, which is for optical analysis of a sample as will be further described, comprises a hand holdable analysis instrument 1 and a base 2. It also includes a sample collector 3 shown in Figures 2 and also Figure 4. The instrument 1 comprises an hollow external casing, moulded from a plastics material for example, within which are housed optical components of the analysis system such as one or more light sources such as lasers, one or more detectors, electronics and memory, and a power source typically a battery although the unit may also or alternatively comprise a power cord or socket for connection to an external power supply such as mains power or an external battery. The instrument 1 is also of a size that it can be conveniently hand held. The casing is shaped to include a handle portion 4 which can be grasped by a user to raise the instrument from the base, place it on the base, and generally manipulate the instrument.

Typically the base 2 will be moulded from a plastics material, but it may alternatively be formed from another material, such as a light weight alloy, by die casting for example. The base 2 is shaped to inter-fit with the instrument 1 and in particular the lower part and underside thereof. Referring to Figures 4 and 5, a peripheral wall 6 of the base defines recess 7 in the base, having a complementary shape to the lower part of the instrument 1 , and into which the lower part and face of the instrument can inter-fit when the instrument 1 is placed on the base as shown in Figures 1 and 3.

In the preferred form the cavity comprises primarily a recess 10 in the underside of the instrument 1 (see Figures 3 and 6). Optical apertures are provided in the part of the casing of the instrument 1 which defines the recess 10, through which e.g. one or more laser(s) and detector(s) of the instrument may operate as will be further described. When the instrument 1 is placed on the base 2, the recess 10 in the underside of the instrument is closed by the upper surface of the base 2, thereby defining a closed cavity 8 between the underside of the instrument and the base. This closed cavity 8 is also substantially light-sealed from the environment external to the instrument and the base to exclude at least a major part of or most external light, to thereby provide a controlled analysis environment. One or more continuous seal elements 11 formed of for example a soft synthetic material may optionally be provided in the base, which contacts and seals against the underside 9 of the instrument 1 , or alternatively or additionally such a seal element may be provided on the underside 9 of the instrument 1 if necessary to exclude all external light.

The preferred form analysis system also comprises the sample collector 3, in the form of a spatula- like element. A longitudinal recess 13 is formed in the base 2, of a complementary shape to that of the collector 3, into which the collector 3 may be placed as shown in Figures 2 and 4 to be retained by the base. This recess 13 is positioned in the base 2 such that the sample collector or at least an operative sample holding part comprising end 3a thereof will be positioned within the closed cavity 8 defined between the instrument 1 and base 2 when the instrument is placed on the base. A cut-out 14 is also provided in the base 2 on either side of the recess 13 which holds the collector, to enable the collector to be removed from and placed in the base by a user grasping the collector 3 between finger and thumb on either side while wearing protective clothing such as gloves.

In the preferred form shown the collector 3 has the spatula shape described and is retained in a similarly shaped recess 13 in the base, but in an alternative form the collector may take any other desired shape. For example the collector may comprise a small disk which is placed in an annular recess or simply on a visually marked area of the base once a sample has been placed on or attached to the collector. Multiple collector devices whether of the form shown in the drawings, or such annular disks, or any other form, may be provided, which are intended to be individually disposed of after a single use, or reused, depending on the application.

Alternatively the underside 9 of the instrument may be shaped to receive and retain a collector 3 prior to the instrument 1 then being placed on base 2. Alternatively again such separate collector(s) may not be provided, and a sample to be tested may be placed directly on the base 2 at a marked point over which the recess 10 in the underside of the instrument will be positioned when the instrument is placed on the base. The base 2 itself may then be intended to be disposed of after a single use or one or more uses, and may for example be formed of a light weight material by vacuum forming, for this purpose. Multiple disposable (or recyclable) bases 2 are then provided.

Typically when it is desired to test for example a suspect powder, a small sample of the powder is picked up with the sample collector 3 for example by wiping or contacting the end 3a of the sample collector through the powder, and then the collector is placed in position in the base. The instrument 1 is then placed on the base, and operated to carry out the analysis of the sample. For example the instrument may comprise on top surface 15 one or more control buttons for controlling the instrument including initiating an analysis of a sample, and a small LED display or similar. Additionally or alternatively the instrument may include a port such as a mini-USB port in its external casing at an appropriate point, enabling downloading from the instrument of data resulting from one or more analysis operations of the instrument.

The instrument may be designed to carryout fluorescence-based analysis or other optically-based analysis of test material for the presence of the spores, bacteria, or other substances. In particular the instrument may be designed to carry out fluorescence analysis by the technique disclosed in WO2007/030020. Optical apertures are provided in the part of the casing of the instrument 1 defining the underside recess 10. For example a 350nm laser or lamp for stimulating fluorescence may be positioned within the interior of the instrument 1 to be focused through aperture 16, and onto the end of the sample collector 3 when the instrument 1 is placed on the base (with the sample collector 3 in position). A UV source may be provided -within the interior of the instrument housing and positioned so that UV will flood into the closed cavity 8 through the aperture 17 when the UV source is illuminated during each test cycle. One or more detectors may be exposed to the interior of the cavity 8 through apertures 18. Each optical aperture 16, 17, 18 is closed by a window or lens.

In an alternative embodiment the optical components of the analysis system Le. one or more light sources such as lasers, detector(s), electronics, and power source of the instrument may be provided in a base module of which the base component 2 described above forms a top part, and the system component described above as the hand held instrument 1 may then simply comprise a dumb sample carrier, or simply a cover intended to be placed over the base to close the test cavity between the base and dumb instrument.

At least preferred embodiments of the analysis system of the invention, comprising an instrument and a base which when they inter-fit define a closed cavity for containing a sample for analysis, and which enable placement and removal of the sample when separated, offer a number of advantages. The cavity which is closed when the instrument and base are inter-fitted defines a controlled environment for carrying out of the analysis such as optical analysis, and the sample is retained at a predetermined location for the analysis. The cavity may be easily cleaned or decontaminated when the instrument and base are separated. The instrument is hand holdable and easily manipulated. The instrument comprising a casing with the optical components of the analysis system mounted within the casing is robust and the optical components of the analysis system are removed from water, dust or other contamination. In embodiments comprising a separate sample collector the sample collector may be a disposable item.

The foregoing describes the invention including a preferred form thereof. Alterations and modifications as may be obvious to those skilled in the art are intended to be incorporated in the scope thereof.

Claims

CLAIMS:
1. An analysis system for analysis of a test sample, comprising a hand holdable analysis instrument and a separate base, the instrument and base inter-fitting when the instrument is placed on the base to define a closed cavity between an underside of the instrument and the base for analysis of a sample positioned in the closed cavity.
2. An analysis system according to claim 1 for optical analysis of a test sample and wherein the closed cavity is substantially light-sealed from the environment external to the instrument and base when the instrument is on the base.
3. An analysis system according to claim 2 wherein the instrument and/or the base comprises an hollow external casing within which are housed optical components of the analysis system, and which casing comprises one or more optical apertures through the casing, and into the closed cavity when the instrument is on the base.
4. An analysis system according to claim 2 wherein the instrument comprises an hollow external casing within which are housed optical components of the analysis system, and one or more optical apertures through the casing, and into the closed cavity when the instrument is on the base.
5. An analysis system according to claim 4 wherein the closed cavity is defined primarily in the underside of the instrument, and the optical aperture(s) is /are provided through a wall part of the external housing of the instrument which defines in part the closed cavity when the instrument is on the base.
6. An analysis system according to any one of claims 3 to 5 wherein optical components of the analysis system include one or more light sources and detectors, and associated electronics and memory are also housed within the instrument and/or base.
7. An analysis system according to any one of claims 3 to 5 wherein a battery is also housed within the instrument and/ or base.
8. An analysis system according to any one of claims 1 to 7 wherein the casing is shaped to include a handle portion which can be grasped by a user to raise the instrument from the base, place it on the base, and generally manipulate the instrument.
9. An analysis system according to any one of claims 1 to 8 wherein the base is shaped to inter-fit with a lower part and underside of the instrument.
10. An analysis system according to claim 9 wherein a peripheral wall of the base defines a recess in the base having a complementary shape to the lower part of the instrument and into which the lower part and underside of the instrument can inter-fit when the instrument is placed on the base.
11. An analysis system according to any one of claims 1 to 10 wherein the closed cavity is defined primarily by a recess in the underside of the instrument when the instrument is on the base.
12. An analysis system according to claim 11 wherein when the instrument is placed on the base the recess in the underside of the instrument is closed by an upper surface of the base to thereby define between the underside of the instrument and the base the closed cavity.
13. An analysis system according to any one of claims 1 to 12 also including one or more continuous seal elements provided in the base which contact(s) and seal(s) against the underside of the instrument when the instrument is on the base and/or one or more continuous seal elements on the underside of the instrument which contact(s) and seal(s) against the base when the instrument is on the base.
14. An analysis system according to any one of claims 1 to 13 also comprising a sample collector for receiving and holding a test sample and retainable by the base or the instrument so that the sample collector or at least a sample holding part thereof is exposed in the closed cavity when the instrument is placed on the base.
15. An analysis system according to claim 14 wherein a recess is formed in the base of a complementary shape to a shape of the sample collector, into which the collector may be placed to be retained by the base in a position on the base such that the sample collector or at least an operative sample holding part thereof is positioned within the closed cavity defined between the instrument and base when the instrument is on the base.
16. An analysis system according to claim 15 wherein a cut-out is provided in the base on either side of the recess into which the collector may be placed, to enable the collector to be removed from and placed in the base by a user grasping the collector between finger and thumb on either side.
17. An analysis system according to claim 16 wherein the sample collector comprises a spatula- like element.
18. An analysis system according to any one of claims 1 to 17 wherein a casing of the instrument is moulded from a plastics material.
19. An analysis system according to any one of claims 1 to 17 wherein a casing of the instrument and a casing of the base are both moulded from a plastics material.
20. An analysis system according to any one of claims 1 to 19 wherein the instrument and/or base comprises one or more control externally exposed buttons user operable to control the instrument including initiating an analysis of a sample.
21. An analysis system according to any one of claims 1 to 20 wherein the instrument or base comprises an external port enabling downloading of data resulting from one or more test sample analysis operations.
22. An analysis system according to any one of claims 1 to 21 arranged to carry out fluorescence-based analysis of a test sample for the presence of spores or bacteria.
23. An analysis system according to claim 22 and comprising within an external casing of the housing or the base a light source focused through an optical aperture into the closed cavity for stimulating fluorescence when the instrument is placed on the base and a detector exposed to the interior of the closed cavity through an optical aperture, each optical aperture comprising a window or lens.
24. An analysis system according to claim 23 also comprising within the external casing of the housing or bone a UV light source to flood the closed cavity through an optical aperture with UV light when the UV light source is illuminated during test cycles of the analysis system.
PCT/NZ2009/000046 2008-03-26 2009-03-26 An analysis system WO2009120100A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US3958908 true 2008-03-26 2008-03-26
US61/039,589 2008-03-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20090725122 EP2263072A1 (en) 2008-03-26 2009-03-26 An analysis system

Publications (1)

Publication Number Publication Date
WO2009120100A1 true true WO2009120100A1 (en) 2009-10-01

Family

ID=41114161

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ2009/000046 WO2009120100A1 (en) 2008-03-26 2009-03-26 An analysis system

Country Status (2)

Country Link
EP (1) EP2263072A1 (en)
WO (1) WO2009120100A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998033056A1 (en) * 1997-01-23 1998-07-30 The Foxboro Company Gas analyzer and optical chamber therefor
US5898503A (en) * 1997-03-19 1999-04-27 Texas Instruments Incorporated Surface plasmon resonance sensor with interchangeable optical element
US6111652A (en) * 1998-07-14 2000-08-29 Texas Instruments Incorporated High throughput surface plasmon resonance analysis system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998033056A1 (en) * 1997-01-23 1998-07-30 The Foxboro Company Gas analyzer and optical chamber therefor
US5898503A (en) * 1997-03-19 1999-04-27 Texas Instruments Incorporated Surface plasmon resonance sensor with interchangeable optical element
US6111652A (en) * 1998-07-14 2000-08-29 Texas Instruments Incorporated High throughput surface plasmon resonance analysis system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date Type
EP2263072A1 (en) 2010-12-22 application

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