CN104089946A - Sectional type full-spectrum direct-reading inductively coupled plasma (ICP) emission spectrometer - Google Patents
Sectional type full-spectrum direct-reading inductively coupled plasma (ICP) emission spectrometer Download PDFInfo
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- CN104089946A CN104089946A CN201410315971.5A CN201410315971A CN104089946A CN 104089946 A CN104089946 A CN 104089946A CN 201410315971 A CN201410315971 A CN 201410315971A CN 104089946 A CN104089946 A CN 104089946A
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Abstract
The invention relates to the technical field of element analysis, and particularly relates to a sectional type full-spectrum direct-reading inductively coupled plasma (ICP) emission spectrometer which comprises a high frequency generator, a sample injection system, a light splitting system, a spectral line collection device and a human-machine interaction system connected with the spectral line collection device, wherein the spectral line collection device is a line array type sensor; the light splitting system comprises an entrance slit for controlling the width of the incident light, a collimating lens for changing the incident divergent light rays into parallel light rays, a plane grating for realizing separation of the parallel light rays different in wavelength, and a collecting lens for collecting the parallel light rays. The sectional type full-spectrum direct-reading emission spectrometer provided by the invention combines the advantages of a full-spectrum direct-reading type ICP and a single-track scanning type ICP and has a higher analysis speed with the cost similar to that of a single-track scanning type instrument.
Description
Technical field
The present invention relates to element analysis technology field, especially a kind of inductive coupling plasma emission spectrograph.
Background technology
Inductive coupling plasma emission spectrograph (ICP) belongs to emission spectrum (optic emission spectrometer) instrument, is divided into two kinds of full spectrum direct-reading and single-channel scanning formulas.
External ICP instrument is entirely to compose direct-reading as main flow.Full spectrum direct-reading type instrument is taking echelle grating and planar detector as core, and by echelle grating by different spectral lines separately, spectral line imaging in one plane, more once gathers whole spectral lines by a planar detector.Analysis speed is fast, and accuracy is high, because this quasi-instrument is taking import as main, and the therefore also symbol taking this full spectrum direct-reading ICP as high-endization instrument on market.
Domestic ICP instrument is taking traditional single-channel scanning formula as main flow.Single-channel scanning formula ICP is taking plane grating and photomultiplier (PMT) as core, and by different spectral lines separately, imaging, then gathers the data of each spectral line point-blank to plane grating by a photomultiplier.In order to gather the data of different spectral lines, need to carry out continuous sweep by rotating shutter, therefore analysis speed is slower.This quasi-instrument advantage is also can keep good optical resolution in long-wave band, stronger to the detectability of rare earth and heavy metal, and cost is relatively cheap, is easily accepted by medium and small client.But its analysis speed too slowly drawbacks limit its use in a lot of occasions.
Full spectrum direct-reading ICP instrument cost is high, and price is also very expensive, is difficult to universal for medium and small sized enterprises.And be limited by the restriction of echelle grating formula optical system, the optical resolution of instrument is very obvious in the inferior position of long-wave band, the rare earth of this quasi-instrument and the analysis ability of heavy metal aspect are limited.Although single-channel scanning formula ICP cost is relatively cheap, excessively slow analysis speed becomes its fatal shortcoming, has limited in the use that much needs express-analysis occasion.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of sectional type Induction Couple Plasma, and it is lower that this spectrometer has cost, and analysis speed is very fast, the feature strong to the analysis ability of rare earth and heavy metal.
In order to solve the problems of the technologies described above, the present invention includes radio-frequency generator, sampling system, beam splitting system, spectral line harvester, with the man-machine interactive system that spectral line harvester is connected, described spectral line harvester is Linear Array Realtime sensor.
Preferably, described radio-frequency generator is the auto-excitation type radio-frequency generator of frequency 40.68MHz or 27.12MHz
Preferably, described Linear Array Realtime sensor is linear CCD sensor or linear array cmos sensor
Preferably, described beam splitting system comprises the entrance slit for controlling incident light width, for the divergent rays of incident being become to the collimating mirror of parallel rays, realizes the plane grating of the parallel rays separation of different wave length, the condenser that parallel rays is assembled.
The present invention combines the advantage of full spectrum direct-reading ICP and single-channel scanning formula ICP, and described sectional type is composed direct-reading spectrometer entirely taking plane grating and line array sensor as core.Different from the detection of photomultiplier (PMT) single-point, line array sensor is array-type sensor, can once obtain several thousand spectral line data.Angle by rotating shutter scans, and each line array sensor can obtain the full spectrum data of different wavelength range, after single pass completes, by software, the data of line array sensor is spliced, and can obtain the full spectrum data in full spectral range.The outstanding advantages of this design is, owing to adopting array-type sensor, once can obtain the full spectrum data in certain wavelength coverage, grating only need rotate minority and just can obtain several times the full spectrum data of full wavelength coverage, from analysis time, be greatly better than single-channel scanning formula, with external once entirely compose compared with direct-reading also also in no way inferior.And owing to adopting plane grating formula optical system, can in full wavelength coverage, keep outstanding and stable optical resolution, this point is better than again once entirely composing direct-reading.The more important thing is, this design can, close with single-channel scanning formula instrument cost in the situation that, provide excellent instrument performance, is the universal basis of reality that provides of ICP quasi-instrument.
Brief description of the drawings
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is the structural representation of beam splitting system.
Embodiment
The embodiment that the present invention is cited; just for helping to understand the present invention; should not be construed as limiting the scope of the present invention; for those skilled in the art; without departing from the inventive concept of the premise; can also the present invention be improved and be modified, these improvement and modification also fall in the scope of the claims in the present invention protection.
As shown in Figure 1, the present invention includes:
The auto-excitation type radio-frequency generator 1 of frequency 40.68MHz or 27.12MHz, for instrument provides radio-frequency drive power, for excited sample solution;
Sampling system 2, carries out atomization by sample solution, and the sample solution after atomization forms micro-drop;
Beam splitting system 3, different spectral lines are spatially separated, being convenient to detecting device detects, as shown in Figure 2, beam splitting system comprises the entrance slit 7 for controlling incident light width, for the divergent rays of incident being become to the collimating mirror 8 of parallel rays, realize the plane grating 9 of the parallel rays separation of different wave length, the condenser 10 that parallel rays is assembled.
Linear Array Realtime sensor 4, described Linear Array Realtime sensor 4 is linear CCD sensor or linear array cmos sensor, for gathering the spectroscopic data of certain wavelength coverage.
The man-machine interactive system 5 being connected with Linear Array Realtime sensor 4, the spectral line data that described man-machine interactive system 5 analytical line configuration sensors 4 collect, obtains the content data of institute's analytical element, and shows by display device.
In the present invention, plane grating 9 is arranged on one above rotational structure, can be rotated rotation along the central shaft of self.Rotational structure utilizes motor to drive, and by rotating different angles, the spectral line in different wavelength range can be projected above line array sensor 4.Rotational structure preferably adopts sine mechanism, can be also cam mechanism, and cosecant mechanism or linear rotation mechanism etc. have the structure of scan function.Such as, suppose that the spectral wavelength scope that will analyze is 180～510nm, suppose that the wavelength coverage that line array sensor once can gather is 30nm, control plane grating rotational structure, gather successively 180～210nm, 210～240nm.。。。。。。, 480～510nm spectral line, grating only need to rotate whole spectral lines that can gather for 11 times in 180～510nm.Therefore, this programme obtains whole spectral lines with the form of segmentation, is called sectional type and entirely composes direct-reading.
Claims (4)
1. sectional type Induction Couple Plasma, comprise radio-frequency generator (1), sampling device (2), beam splitting system (3), spectral line harvester, the man-machine interactive system (5) being connected with spectral line harvester, is characterized in that, described spectral line harvester is Linear Array Realtime sensor (4).
2. sectional type Induction Couple Plasma according to claim 1, is characterized in that, described radio-frequency generator is the auto-excitation type radio-frequency generator of frequency 40.68MHz or 27.12MHz.
3. sectional type Induction Couple Plasma according to claim 1, is characterized in that, described Linear Array Realtime sensor is linear CCD sensor or linear array cmos sensor.
4. sectional type Induction Couple Plasma according to claim 1, it is characterized in that, described beam splitting system comprises the entrance slit (7) for controlling incident light width, for the divergent rays of incident being become to the collimating mirror (8) of parallel rays, realize the plane grating (9) of the parallel rays separation of different wave length, the condenser (10) that parallel rays is assembled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410315971.5A CN104089946A (en) | 2014-07-03 | 2014-07-03 | Sectional type full-spectrum direct-reading inductively coupled plasma (ICP) emission spectrometer |
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| CN201410315971.5A CN104089946A (en) | 2014-07-03 | 2014-07-03 | Sectional type full-spectrum direct-reading inductively coupled plasma (ICP) emission spectrometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267486A (en) * | 2021-07-05 | 2021-08-17 | 钢研纳克检测技术股份有限公司 | Wide-spectrum high-resolution inductively coupled plasma emission spectrometer |
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| CN1831498A (en) * | 2006-02-14 | 2006-09-13 | 天津大学 | Method for improving sensitivity of spectrograph and its carry-out device |
| CN201145667Y (en) * | 2007-11-23 | 2008-11-05 | 王先国 | Spectrometer excited by electric spark with spectral line strength correcting function |
| GB2498512A (en) * | 2011-12-14 | 2013-07-24 | Thermo Fisher Scient Ecublens Sarl | Spectrometer with a toroidal mirror for simultaneous illumination of multiple diffraction gratings |
| CN203949873U (en) * | 2014-07-03 | 2014-11-19 | 无锡创想分析仪器有限公司 | Sectional type Induction Couple Plasma |
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2014
- 2014-07-03 CN CN201410315971.5A patent/CN104089946A/en active Pending
Patent Citations (5)
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| US6023330A (en) * | 1998-12-21 | 2000-02-08 | Leco Corporation | Centered sphere spectrometer |
| CN1831498A (en) * | 2006-02-14 | 2006-09-13 | 天津大学 | Method for improving sensitivity of spectrograph and its carry-out device |
| CN201145667Y (en) * | 2007-11-23 | 2008-11-05 | 王先国 | Spectrometer excited by electric spark with spectral line strength correcting function |
| GB2498512A (en) * | 2011-12-14 | 2013-07-24 | Thermo Fisher Scient Ecublens Sarl | Spectrometer with a toroidal mirror for simultaneous illumination of multiple diffraction gratings |
| CN203949873U (en) * | 2014-07-03 | 2014-11-19 | 无锡创想分析仪器有限公司 | Sectional type Induction Couple Plasma |
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| 何嘉耀等: "自装CCD-ICP-OES仪器软件 1.软件系统及设计思想", 《光谱学与光谱分析》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267486A (en) * | 2021-07-05 | 2021-08-17 | 钢研纳克检测技术股份有限公司 | Wide-spectrum high-resolution inductively coupled plasma emission spectrometer |
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Application publication date: 20141008 |