CN112666099A - Visible spectrophotometer for detecting aldehydes and detection method thereof - Google Patents
Visible spectrophotometer for detecting aldehydes and detection method thereof Download PDFInfo
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- CN112666099A CN112666099A CN202011377039.7A CN202011377039A CN112666099A CN 112666099 A CN112666099 A CN 112666099A CN 202011377039 A CN202011377039 A CN 202011377039A CN 112666099 A CN112666099 A CN 112666099A
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- 238000001514 detection method Methods 0.000 title claims abstract description 73
- 150000001299 aldehydes Chemical class 0.000 title claims 9
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 230000000903 blocking effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 238000012935 Averaging Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000000428 dust Substances 0.000 description 15
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 13
- 239000007788 liquid Substances 0.000 description 7
- 238000005192 partition Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 238000000862 absorption spectrum Methods 0.000 description 4
- 238000000149 argon plasma sintering Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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Abstract
The spectrophotometer comprises a shell, a light source, a workbench, a detector, a monochromatic mirror and a reflecting mirror, wherein the light source, the workbench, the detector, the monochromatic mirror and the reflecting mirror are arranged in the shell; the movable mirror can make light reflect to the sample through the movable mirror and the fixed mirror through sliding, or directly reflect to the sample through the movable mirror, and the two light paths are perpendicular to each other through the path of the sample. By the spectrophotometer and the detection method thereof, the secondary detection does not need to rotate or move the sample, so that the detection precision is improved; the detection precision is further improved by setting the same optical path length of the two detections.
Description
Technical Field
The application relates to the field of environmental detection, in particular to a visible spectrophotometer for detecting aldehydes and a detection method thereof.
Background
The principle of the visible spectrophotometer is as follows: the ultraviolet-visible absorption spectrum of a molecule is an absorption spectrum generated by electronic energy level transition after some groups in the molecule absorb ultraviolet-visible radiation. Because each substance has different molecules, atoms and different molecular space structures, the situation of absorbing light energy is different, so that each substance has a specific and fixed absorption spectrum curve, and the content of the substance can be distinguished or determined according to the absorbance at certain characteristic wavelengths on the absorption spectrum, which is the basis of spectrophotometric qualitative and quantitative analysis. The content of the aldehyde substances in the liquid can be detected by a visible spectrophotometer.
The utility model discloses a chinese utility model patent that the publication number is CN201689045U discloses a portable ultraviolet-visible spectrophotometer, including shell, light source, speculum, instrument mainboard, chargeable lithium cell, color comparison frame, monochromator and PDA detector, wherein speculum and monochromator are established respectively in color comparison frame both sides, and monochromator outgoing direction installation PDA detector, the incident direction of speculum set up the xenon lamp light source. The colorimetric stand is used for placing a cuvette containing a sample to be tested, and the PDA detector detects photometric signals passing through the sample and feeds back the photometric signals to the processor to form a map for personnel to analyze.
In view of the above related technologies, the inventor believes that the detection method can only detect the substance content in a single direction of a sample, and the arrangement of the substances in the liquid has randomness, which leads to an inaccurate detection result, especially when the samples are not uniformly shaken. If the sample is rotated for ninety degrees and then detected again, the detection accuracy can be improved by taking the average value in the two detections, but the liquid in the sample is disturbed to flow when the sample is rotated, so that the secondary detection result is not accurate enough.
Disclosure of Invention
In order to improve the detection accuracy, the application provides a visible spectrophotometer for detecting aldehydes and a detection method thereof.
In a first aspect, the present application provides a visible spectrophotometer for detecting aldehydes, which adopts the following technical scheme:
a visible spectrophotometer for detecting aldehydes comprises a shell, a light source, a workbench, a detector, a monochromatic mirror and a reflecting mirror, wherein the light source, the workbench, the detector, the monochromatic mirror and the reflecting mirror are arranged in the shell; the reflecting mirror comprises a movable mirror and a fixed mirror, the movable mirror is in sliding connection with the shell, the fixed mirror is fixed with the shell, a driving source and an arc-shaped guide rail are arranged in the shell, the detector is arranged on the guide rail in a sliding mode and driven to slide by the driving source, the sliding range of the detector along the guide rail is ninety degrees of circumferential rotation around the workbench, and the detector is opposite to the sample; the movable mirror can make light reflect to the sample through the movable mirror and the fixed mirror through sliding, or directly reflect to the sample through the movable mirror, and the two light paths are perpendicular to each other through the path of the sample.
By adopting the technical scheme, before the movable mirror and the detector move to the position (state A), light rays emitted by the light source are received by the detector after passing through the monochromatic mirror, the movable mirror, the fixed mirror and the sample, and signals of the detector are output to the system for analysis. After the movable mirror and the detector are moved to the positions (state B), the movable mirror can be manually moved, the detector is driven by the driving source to move, and light emitted by the light source is received by the detector after passing through the monochromatic mirror, the movable mirror and the sample. Through twice detection, two mutually perpendicular light paths penetrate through the sample, and the detection accuracy can be improved after the detection results are averaged. The sample does not need to be rotated or moved in the two-time detection, so that the liquid in the sample is not disturbed, and the detection accuracy can be ensured.
Optionally, the detectors are located at two ends of the guide rail and have different distances from the sample, so that the total lengths of the two optical paths are the same.
By adopting the technical scheme, the light path distance of the two times of detection is the same, so that errors caused by light scattering and dust blocking are reduced, the difference of the two times of detection can be reduced, the variable is reduced, and the detection accuracy is improved.
Optionally, the driving source is a motor, the shell rotates and is provided with a base, the base is located at the end of the guide rail, the motor is fixed on the base, a screw rod is coaxially fixed on a rotating shaft of the motor, a connecting seat is arranged on the detector in a rotating mode, and the screw rod penetrates through the connecting seat and is in threaded connection with the connecting seat.
Through adopting above-mentioned technical scheme, the motor drives the lead screw during operation and rotates, and the lead screw orders about the connecting seat through threaded connection effect and slides along its axial, and the connecting seat drives slip table, detector and slides along the guide rail. The mechanism can not be locked through the rotating connection action of the base and the connecting seat, when the motor runs, the screw rod swings in a self-adaptive mode, and the base rotates around the rotating shaft in a self-adaptive mode.
Optionally, the movable mirror is fixed with a sliding block, the housing is provided with a sliding rail for the sliding block to slide, the base is fixed with a pull rod, the pull rod and the sliding block are connected through a connecting rod, and two ends of the connecting rod are respectively hinged to the pull rod and the sliding block.
Through adopting above-mentioned technical scheme, after the detector slided to the other end along the guide rail, base self-adaptation rotated and driven the pull rod swing, and the pull rod passes through connecting rod pulling slider and removes, removes the movable mirror to the one side that the sample deviates from the detector. The arrangement realizes the automatic movement of the movable mirror, and the movable mirror does not need to be additionally provided with a driving source.
Optionally, the casing is internally provided with a partition board, the partition board divides the casing into a working cavity and a container cavity, the workbench and the sample are located in the container cavity, the light source, the monochromatic mirror and the reflecting mirror are located in the working cavity, and a transparent ash baffle is arranged on the partition board corresponding to the position where the light path passes through.
Through adopting above-mentioned technical scheme, the baffle is used for preventing that the dust from getting into the work intracavity influence and detecting the precision, and the dust board can supply the light path to pass through when playing the effect of keeping off the ash.
Optionally, the casing is hinged with a cover plate, and the cover plate can shield the top of the workbench through rotation.
Through adopting above-mentioned technical scheme, in the testing process, the apron lid plays dustproof effect for the casing after on the casing.
Optionally, the detector is fixed with a first locking block, the cover plate is provided with a second locking block matched with the first locking block, when the cover plate covers the shell and a light path is directly reflected to a sample through the movable mirror, the first locking block and the second locking block are mutually embedded to limit the cover plate to be opened, and the first locking block can be separated from the second locking block after moving along with the detector.
Through adopting above-mentioned technical scheme, when the apron lid was on the casing, the light path was directly when the movable mirror reflects to the sample, when the detector removed to the guide rail and deviates from the tip of movable mirror promptly, locking piece one, locking piece two were inlayed each other and are established the restriction apron and open, prevent that the artifical apron of opening in the testing process from bringing into the dust and influencing detection precision. After the detector moves towards the light source direction, the first locking block spontaneously breaks away from the second locking block along with the movement of the detector, and the cover plate can be smoothly opened at the moment.
In a second aspect, the present application provides a detection method for detecting aldehydes, which adopts the following technical scheme:
a detection method for detecting aldehydes, comprising the steps of:
step S1: placing the sample in a visible spectrophotometer, starting the visible spectrophotometer, and detecting the sample by a light path passing through the sample;
step S2: moving the positions of the reflecting mirror and the detector to enable the light path passing through the sample to be perpendicular to the step S1, and carrying out secondary detection on the sample without moving the sample in the process;
step S3: and averaging the detection results of the steps S1 and S2 to obtain a final detection result.
By adopting the technical scheme, the detection method can be finished on a common visible spectrophotometer in a manual mode, and can also be finished directly by the spectrophotometer. Through twice detection, two mutually perpendicular light paths penetrate through the sample, and the detection accuracy can be improved after the detection results are averaged. The sample does not need to be rotated or moved in the two-time detection, so that the liquid in the sample is not disturbed, and the detection accuracy can be further improved.
Optionally, in the step S2, the optical path lengths in the steps S1 and S2 are made the same by setting the position of the detector.
By adopting the technical scheme, the light path distance of the two times of detection is the same, so that errors caused by light scattering and dust blocking are reduced, the difference of the two times of detection can be reduced, the variable is reduced, and the detection accuracy is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the secondary detection does not need to rotate or move the sample, so that the detection precision is improved;
2. the detection precision is further improved by setting the same optical path length of the two detections;
3. when the detector moves, the displacement of the movable mirror can be automatically completed.
Drawings
Fig. 1 is an overall view of a visible spectrophotometer for detecting aldehydes according to the first embodiment.
Fig. 2 is a partial exploded view of the first embodiment.
Fig. 3 is a schematic diagram of the linkage structure of the detector and the movable mirror according to the first embodiment.
FIG. 4 is a top view of the A state in the first embodiment, mainly highlighting the optical path of the A state;
FIG. 5 is a top view of the B state in the first embodiment, mainly highlighting the optical path of the B state.
Description of reference numerals: 1. a housing; 11. a cover plate; 12. a work table; 10. a sample; 13. a partition plate; 14. a working chamber; 15. a container cavity; 2. a light source; 21. a monochromatic mirror; 3. a mirror; 131. a dust blocking plate; 31. a movable mirror; 32. fixing the mirror; 4. a detector; 41. a sliding table; 16. a guide rail; 5. a motor; 51. a base; 52. a screw rod; 42. a connecting seat; 311. a slider; 17. a slide rail; 53. a pull rod; 54. a connecting rod; 18. an avoidance groove; 43. locking a first block; 111. and a second locking block.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The first embodiment is as follows:
the embodiment of the application discloses a visible spectrophotometer for detecting aldehydes. Referring to fig. 1, a visible spectrophotometer for detecting aldehydes includes casing 1, hinges apron 11 on casing 1, is equipped with workstation 12 in the casing 1, is used for placing sample 10 on workstation 12, and apron 11 can rotate around articulated department and switch the state of covering workstation 12, opening workstation 12, and apron 11 covers plays dustproof effect in casing 1 after on casing 1.
Referring to fig. 1 and 2, a circle of partition plates 13 are arranged in the housing 1, and the partition plates 13 divide the interior of the housing 1 into a working chamber 14 and a container chamber 15, wherein the working chamber 14 is an annular chamber which is channel-shaped; the container cavity 15 is located in the annular middle of the working cavity 14, and the working platform 12 and the sample 10 are located in the container cavity 15. Be equipped with light source 2, monochromatic mirror 21, speculum 3 in the working chamber 14, the board is established at the top of working chamber 14 and is sheltered from, reduces the ash that advances of working chamber 14. Four holes are formed in the partition plate 13, an ash blocking plate 131 is arranged in each hole, the ash blocking plate 131 seals the hole, the ash blocking plate 131 is a transparent glass plate, and light can penetrate through the ash blocking plate 131. The four dust baffles 131 are respectively located at four circumferential directions of the workbench 12, and each dust baffle 131 is respectively opposite to four circumferential side walls of the sample 10.
The light source 2 is a conventional light source of a visible spectrophotometer, and the light emitting direction of the light source 2 is along the channel extending direction of the working chamber 14. The reflecting mirror 3 comprises a movable mirror 31 and a fixed mirror 32, wherein the monochromatic mirror 21 and the movable mirror 31 are located on a path through which the light source 2 is directly projected, the monochromatic mirror 21 is located between the light source 2 and the movable mirror 31, light emitted by the light source 2 passes through the monochromatic mirror 21 and then is emitted onto the movable mirror 31, and the mirror surface of the movable mirror 31 is inclined, so that the light path is bent ninety degrees towards the direction of the workbench 12. The fixed mirror 32 is located on the path of the light path reflected by the movable mirror 31, the fixed mirror 32 abuts against the dust shield 131 in the direction corresponding to the stage 12, the mirror surface of the fixed mirror 32 is also inclined so that the light path is bent ninety degrees in the direction of the stage 12, and the light path passes through the dust shield 131 and then passes through the sample 10 on the stage 12.
The working chamber 14 is also provided with a detector 4 for receiving light, the detector 4 is positioned on one side of the worktable 12, which is far away from the fixed mirror 32, the detector 4 is abutted against the dust baffle 131 in the corresponding direction of the worktable 12, and the detection end of the detector 4 is opposite to the sample 10.
In this state of the spectrophotometer, light emitted from the light source 2 is received by the detector 4 through the dichroic mirror 21, the movable mirror 31, the fixed mirror 32, the ash baffle 131, the sample 10 and the ash baffle 131, and a signal of the detector 4 is output to the system for analysis. This state will now be referred to as the a state.
The detector 4 and the movable mirror 31 are slidably provided in the housing 1, and are interlocked with each other, and have the following structure:
referring to fig. 2 and 3, a sliding table 41 is fixed to the bottom of the detector 4, the guide rail 16 is fixed to the housing 1, and the detector 4 is slidably disposed on the guide rail 16 through the sliding table 41. The guide rail 16 is curved into an arc shape, the arc is a quarter of an ellipse, one end of the guide rail 16 is the position of the detector 4 when in the state a, and the other end of the guide rail 16 is the dust baffle 131 at the position of the workbench 12 departing from the monochromatic mirror 21 and close to the position. After the detector 4 slides to any end along the guide rail 16, the detecting end of the detector 4 faces the sample 10, the detector 4 rotates ninety degrees on the horizontal plane relative to the circumference of the sample 10, and the sample 10 and the detector 4 are separated by a dust baffle 131.
The lower layer of the casing 1 positioned on the detector 4 is provided with a driving source, the driving source is a motor 5 capable of rotating forward and backward, the casing 1 is rotatably connected with a base 51, the rotating axis of the base 51 is along the vertical direction, and the base 51 is positioned at the end part of the guide rail 16 and positioned at one side of the guide rail 16 facing the light source 2. The motor 5 is fixed on the base 51, a screw rod 52 is coaxially fixed on an output shaft of the motor 5, and the axial direction of the screw rod 52 is along the horizontal direction. The motor 5 is fixed on the base 51, and a screw rod 52 is coaxially fixed on a rotating shaft of the motor 5. The bottom of the sliding table 41 is rotatably connected with a connecting seat 42, the rotating axis of the connecting seat 42 is along the vertical direction, and a screw rod 52 penetrates through the connecting seat 42 and is in threaded connection with the connecting seat 42. When the motor 5 operates, the screw rod 52 is driven to rotate, the screw rod 52 drives the connecting seat 42 to slide along the axial direction thereof through the threaded connection effect, and the connecting seat 42 drives the sliding table 41 and the detector 4 to slide along the guide rail 16. When the motor 5 runs, the screw rod 52 swings in a self-adaptive manner, and the base 51 rotates around the rotating shaft in a self-adaptive manner.
The bottom of the movable mirror 31 is fixed with a slide block 311, the housing 1 is provided with a slide rail 17 for the slide block 311 to slide, the length direction of the slide rail 17 is parallel to the light path directly emitted by the light source 2, and the slide block 311 and the base 51 are located at the same height position. The pull rod 53 is fixed on the side wall of the base 51, the pull rod 53 extends along the direction departing from the connecting seat 42, the connection is established between the pull rod 53 and the sliding block 311 by arranging the connecting rod 54, and the two ends of the connecting rod 54 are respectively hinged with the pull rod 53 and the sliding block 311.
The lengths of the pull rod 53 and the connecting rod 54 are set as follows: referring to fig. 4 and 5, in the state a, the slider 311 is located at an end of the slide rail 17 away from the light source 2, and the movable mirror 31 is located at a position to reflect the light emitted from the light source 2 to the fixed mirror 32. When the detector 4 slides to the other end along the guide rail 16, the base 51 rotates adaptively to drive the pull rod 53 to swing, the pull rod 53 pulls the slider 311 to move through the connecting rod 54, and the movable mirror 31 is moved to the side of the sample 10 away from the detector 4. At this time, the light emitted from the light source 2 passes through the dichroic mirror 21, the movable mirror 31, one of the dust-blocking plates 131, the sample 10, and one of the dust-blocking plates 131, and is received by the detector 4. This state is referred to as a B state, in which the optical paths through the specimen are perpendicular to each other.
The distance between the detector 4 and the test piece when the detector is positioned at the two ends of the guide rail 16 is different, and the specific setting is as follows: the optical path length of the A state is the same as that of the B state, so that errors caused by light scattering and dust blocking are reduced.
Referring to fig. 1, a first locking block 43 is fixed on the sliding table 41, the first locking block 43 protrudes upwards out of the housing 1, and the housing 1 is provided with a sliding range for avoiding the groove 18 from the first locking block 43. The inside wall of apron 11 is fixed with two 111 of locking piece with the cooperation of locking piece 43, and locking piece 43, two 111 of locking piece all include a plurality of bar-shaped blocks that extend along the horizontal direction, are equipped with the groove that supplies another locking piece embedding between the bar-shaped block. When the cover plate 11 is covered on the housing 1, and the light path is directly reflected to the sample 10 through the movable mirror 31, that is, when the detector 4 moves to the end of the guide rail 16 departing from the movable mirror 31, the first locking block 43 and the second locking block 111 are mutually embedded to limit the cover plate 11 to be opened, so that the influence of dust brought by manually opening the cover plate 11 in the detection process on the detection precision is prevented. After the detector 4 moves towards the light source 2, the first locking block 43 spontaneously disengages from the second locking block 111 along with the movement of the detector 4, and the cover plate 11 can be smoothly opened.
The implementation principle of the visible spectrophotometer for detecting aldehydes in the embodiment of the application is as follows: the spectrophotometer is in the state A by default, after a person opens the cover plate 11, the sample 10 is placed at the accurate position of the workbench 12, and then the cover plate 11 is closed to start the spectrophotometer. The spectrophotometer detects the detection result of the state A, then the motor 5 is controlled to operate, the spectrophotometer is switched to the state B, and the result is obtained through re-detection. And the personnel take the average value of the two detection results to be used as the final detection result.
Through twice detection, two mutually perpendicular light paths penetrate through the sample 10, and the detection accuracy can be improved after the detection results are averaged. Because the distance of the light path of the two times of detection is the same, the number of the lenses passing through is the same, and only the difference is the reflection of one fixed mirror 32, the difference of the two times of detection can be reduced, the variable is reduced, and the detection accuracy is improved. The detection in two times does not need to rotate or move the sample 10, so that the liquid in the sample 10 is not disturbed, and the detection accuracy can be improved.
Example two:
a detection method for detecting aldehydes, comprising the steps of:
step S1: placing the sample 10 in a visible spectrophotometer, starting the visible spectrophotometer, and detecting the sample 10 by a light path passing through the sample 10;
step S2: the positions of the mirror 3 and the detector 4 are moved so that the optical path through the sample 10 is perpendicular to step S1, and the sample 10 is secondarily detected without moving the sample 10 in the process. When the position of the detector 4 is moved, the optical path lengths in step S1 and step S2 are made the same.
Step S3: and averaging the detection results of the steps S1 and S2 to obtain a final detection result.
The detection method can be finished on a common visible spectrophotometer in a manual mode, and can also be finished directly through the spectrophotometer of the first embodiment.
Through twice detection, two mutually perpendicular light paths penetrate through the sample 10, and the detection accuracy can be improved after the detection results are averaged. The detection in two times does not need to rotate or move the sample 10, so that the liquid in the sample 10 is not disturbed, and the detection accuracy can be improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A visible spectrophotometer for detecting aldehydes comprises a shell (1), a light source (2) arranged in the shell (1), a workbench (12), a detector (4), a monochromatic mirror (21) and a reflecting mirror (3), wherein a sample (10) is placed on the workbench (12), and light emitted by the light source (2) reaches the detector (4) after passing through the monochromatic mirror (21), the reflecting mirror (3) and the sample (10); the method is characterized in that: the reflecting mirror (3) comprises a movable mirror (31) connected with the shell (1) in a sliding mode and a fixed mirror (32) fixed with the shell (1), a driving source and an arc-shaped guide rail (16) are arranged in the shell (1), the detector (4) is arranged on the guide rail (16) in a sliding mode and driven to slide by the driving source, the detector (4) rotates ninety degrees around the circumferential direction of the workbench (12) in the sliding range of the guide rail (16), and the detector (4) is opposite to the sample (10); the movable mirror (31) can enable light rays to be reflected to the sample (10) through the movable mirror (31) and the fixed mirror (32) through sliding, or the light rays are directly reflected to the sample (10) through the movable mirror (31), and the two light paths penetrate through the sample (10) and are perpendicular to each other.
2. A visible spectrophotometer for detecting aldehydes as claimed in claim 1, wherein: the detectors (4) are positioned at the two ends of the guide rail (16) and have different distances from the sample (10), so that the total lengths of the two optical paths are the same.
3. A visible spectrophotometer for detecting aldehydes as claimed in claim 1, wherein: the driving source is motor (5), casing (1) rotates and is provided with base (51), base (51) are located the tip of guide rail (16), motor (5) are fixed in on base (51), the coaxial lead screw (52) that is fixed with of pivot of motor (5), it is provided with connecting seat (42) to rotate on detector (4), lead screw (52) pass connecting seat (42) and with connecting seat (42) threaded connection.
4. A visible spectrophotometer for detecting aldehydes as claimed in claim 3, wherein: the movable mirror (31) is fixed with slider (311), casing (1) is equipped with supplies slider (311) gliding slide rail (17), base (51) are fixed with pull rod (53), establish the connection through setting up connecting rod (54) between pull rod (53), slider (311), the both ends of connecting rod (54) are articulated with pull rod (53), slider (311) respectively.
5. A visible spectrophotometer for detecting aldehydes as claimed in claim 1, wherein: be equipped with baffle (13) in casing (1), baffle (13) divide into working chamber (14), container chamber (15) in with casing (1), workstation (12), sample (10) are located container chamber (15), light source (2), monochromatic mirror (21), speculum (3) are located working chamber (14), be equipped with transparent ash blocking plate (131) corresponding to the position that the light path passes through on baffle (13).
6. A visible spectrophotometer for detecting aldehydes as claimed in claim 1, wherein: the shell (1) is hinged with a cover plate (11), and the cover plate (11) can shield the top of the workbench (12) through rotation.
7. A visible spectrophotometer for detecting aldehydes as claimed in claim 6, wherein: detector (4) are fixed with locking piece (43), apron (11) be equipped with locking piece (43) complex locking piece two (111), work as when apron (11) lid is on casing (1), the light path is direct when reflecting sample (10) through activity mirror (31), locking piece one (43), locking piece two (111) are inlayed each other and are established restriction apron (11) and open, locking piece one (43) can break away from with locking piece two (111) after moving along with detector (4).
8. A detection method for detecting aldehydes, characterized by: the method comprises the following steps:
step S1: placing the sample (10) in a visible spectrophotometer, starting the visible spectrophotometer, and detecting the sample (10) by a light path penetrating through the sample (10);
step S2: moving the positions of the reflecting mirror (3) and the detector (4) to make the optical path passing through the sample (10) perpendicular to the step S1, and carrying out secondary detection on the sample (10), wherein the sample (10) is not moved in the process;
step S3: and averaging the detection results of the steps S1 and S2 to obtain a final detection result.
9. The detection method according to claim 8, wherein the detection method comprises: in the step S2, the optical path length in the steps S1 and S2 is made the same by setting the position of the detector (4).
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| CN202011377039.7A CN112666099B (en) | 2020-11-30 | 2020-11-30 | Visible spectrophotometer for detecting aldehydes and detection method thereof |
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| CN202011377039.7A CN112666099B (en) | 2020-11-30 | 2020-11-30 | Visible spectrophotometer for detecting aldehydes and detection method thereof |
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