CN101788481A - Device and method for detecting concentration of pyridine farm chemical - Google Patents
Device and method for detecting concentration of pyridine farm chemical Download PDFInfo
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- CN101788481A CN101788481A CN201010106074A CN201010106074A CN101788481A CN 101788481 A CN101788481 A CN 101788481A CN 201010106074 A CN201010106074 A CN 201010106074A CN 201010106074 A CN201010106074 A CN 201010106074A CN 101788481 A CN101788481 A CN 101788481A
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Abstract
The invention discloses a device for detecting concentration of pyridine farm chemical, comprising a light source, a first light split component, a sample room, a fluorescence tank, a second light split component, a second light split component controller, a photoelectric multiplier detector, a data acquisition device and a computer. The detection method comprises the following steps: single light suitable for exciting the pyridine farm chemical is selected; a tested sample in the fluorescence tank is excited; the tested sample gives out fluorescent light after being excited; the photoelectric multiplier detector transmits scanned light spectrum signals into electrical signals and amplifies the electrical signals; the electrical signals is sent into a computer through the data acquisition device to carry out data processing to obtain concentration value of the tested value. The invention has the advantages of simple operation, low cost and realization of fast and accurate on-line detection.
Description
Technical field
The present invention relates to pesticide detection device, specifically a kind of concentration of pyridine farm chemical pick-up unit and method.
Background technology
The quality testing of agricultural chemicals is the important technology basis of approval pesticide producing, is again whether qualified main foundation of supervision investigation pesticide producing merchant and dealer's commodity.In order to ensure the production of cultivating of agricultural; in order further to improve China's Pesticidal products quality, safeguard peasant's basic rights and interests, State General Administration for Quality Supervision strengthens in recent years to Pesticidal products quality supervision selective examination dynamics; be intended to hit the listing of low-quality goods, protection peasant's legitimate rights and interests.
Along with progress economic and society, along with the attention of country to the rural area, the quality of scientic planting and Pesticidal products is state key propaganda and supervision, also is that the peasant thirsts for grasping and paying close attention to.The method that pesticide quality is detected mainly is a vapor-phase chromatography at present, and during survey fees, effort both had been not suitable for the online detection of pesticide producing enterprise, also was not suitable for the fast detecting of quality supervision department.
By current, still do not have and to carry out technology and device quick, online detection to the pyridine farm chemical principal ingredient, therefore be necessary to design a kind of easy to operate, on-line measuring device fast, be beneficial to the pyridine farm chemical quality is accurately reflected, satisfy the demand of peasant, impel the raising of pesticide industry total quality level qualified agricultural chemicals.
Summary of the invention
The object of the present invention is to provide a kind of device and method of fast detecting pyridine farm chemical quality.
A kind of concentration of pyridine farm chemical pick-up unit, it is characterized in that: comprise light source, first light splitting part, the sample chamber, the fluorescence pond, second light splitting part, the second light splitting part controller, photomultiplier tube detectors, data collector and computing machine, described light source, first light splitting part, the sample chamber, second light splitting part is successively set on the same light path, photomultiplier tube detectors is fixed on the light-emitting window of second light splitting part, the fluorescence pond is placed on the place, point of crossing of input path and emitting light path in the sample chamber, second light splitting part is connected with computing machine by its controller, and photomultiplier tube detectors is connected with computing machine by data collector.
Described light source is xenon lamp or deuterium lamp.
Described first light splitting part is monochromator or filter disc.
Described second light splitting part is monochromator or spectrometer.
Described data collector is data acquisition unit or single photon counter.
Detect the method for concentration of pyridine farm chemical with said apparatus, step comprises: the light that light source is sent is selected the light of single wavelength in the 317-337nm scope with first light splitting part, come sample in the fluorescence excitation pond with it, after being excited, sends sample fluorescence, second light splitting part is set at 330-500nm scope interscan spectrum, photomultiplier tube detectors is converted into electric signal with the spectral signal that scans and amplifies, send into computing machine through data collector and carry out data processing, adopt the offset minimum binary algorithm that spectroscopic data is analyzed, draw the concentration value of sample.
That concentration of pyridine farm chemical pick-up unit provided by the invention and method have is simple to operate, expense is cheap and advantage such as online detection rapidly and accurately, big with the equipment volume of existing pesticide quality pick-up unit, acquisition cost is high, testing cost is high forms a sharp contrast.This method and device can reflect the content of pyridine farm chemical fast and accurately, can satisfy fully pyridine farm chemical content is carried out the needs that continuous real-time online detects, also meet supervision department fully pyridine farm chemical content is carried out monitoring requirements fast and accurately.
Description of drawings
Fig. 1 is the structural representation of concentration of pyridine farm chemical pick-up unit of the present invention
Fig. 2 is the fluorescence spectrum figure of testing sample
Fig. 3 is an experiment algorithm predicts illustraton of model
Fig. 4 is experiment algorithm predicts figure as a result
Embodiment
Below in conjunction with accompanying drawing concentration of pyridine farm chemical pick-up unit of the present invention and detection method are described in further detail.
A kind of concentration of pyridine farm chemical pick-up unit (as shown in Figure 1), comprise light source 1, light source 1 is placed on the input path of first light splitting part 2, the light-emitting window of light source 1 is aimed at the light inlet of first light splitting part 2, sample chamber 3 is placed on the emitting light path of first light splitting part 2, the light-emitting window of first light splitting part 2 is aimed at the incident window of sample chamber 3, second light splitting part 5 is placed on the emitting light path of sample chamber 3, the outgoing window of sample chamber 3 is aimed at the light inlet of second light splitting part 5, photomultiplier tube detectors 7 is fixed on the light-emitting window of second light splitting part 5, the test surface of photomultiplier tube detectors 7 is aimed at the light-emitting window of second light splitting part 5, light source 1 light-emitting window, the light inlet of first light splitting part 2 and light-emitting window, the incident window of sample chamber 3 and outgoing window, the light inlet of second light splitting part 5 and light-emitting window, the test surface of photomultiplier tube detectors 7 is on same light path, fluorescence pond 4 is placed on the place, point of crossing of sample chamber 3 interior input paths and emitting light path, the controller 6 that is connected with second light splitting part 5 links to each other with computing machine 9, and the data collector 8 that links to each other with photomultiplier tube detectors 7 is connected with computing machine 9.
With pyridine farm chemical---Acetamiprid is an example, detects.Mixed liquor with methyl alcohol and distilled water (4: 1) is a solvent, is mixed with the Acetamiprid specimen (pH value is 12, and detecting this concentration by the prior art vapor-phase chromatography is 90.01mg/kg) of a 90mg/kg concentration.At first light source is sent light and select the exciting light that wavelength is 322nm,, send fluorescence after sample is excited with its Acetamiprid (firing time is 1min) that comes the testing sample 90mg/kg concentration in the indoor fluorescence of the excited sample pond by first light splitting part; Afterwards by second light splitting part sweep test sample spectrum (seeing shown in Figure 2) in the 340-400nm interval.Photomultiplier tube detectors is converted into electric signal with the light signal that scans and amplifies and pass to data collector, after data collector is finished data acquisition, send into computing machine and carry out data processing, adopt the offset minimum binary algorithm that spectroscopic data is analyzed, draw the concentration value of sample at last.
Above-mentioned experiment with the spectroscopic data of 1mg/kg, 3mg/kg, 5mg/kg, 10mg/kg, 20mg/kg, 30mg/kg, 40mg/kg, 50mg/kg, 60mg/kg, 70mg/kg, 80mg/kg, 100mg/kg, a 110mg/kg and 120mg/kg14 concentration (solvent, pH value and firing time all with 90mg/kg concentration identical) as calibration set, number of principal components is 8, sets up offset minimum binary mathematics calibration model (as shown in Figure 3).The spectroscopic data of testing sample is predicted that test result is 89.3218mg/kg (as shown in Figure 4) with the calibration model of having set up, this result the recovery and relative standard deviation be respectively 99.25% and 0.53%.
Experiment showed, that this method has easy to operate, low-loss, high sensitivity, can realize characteristics such as quick online detection, can satisfy fully pyridine farm chemical content is carried out the needs that continuous real-time online detects.
Claims (6)
1. concentration of pyridine farm chemical pick-up unit, it is characterized in that: comprise light source (1), first light splitting part (2), sample chamber (3), fluorescence pond (4), second light splitting part (5), the second light splitting part controller (6), photomultiplier tube detectors (7), data collector (8) and computing machine (9), described light source (1), first light splitting part (2), sample chamber (3), second light splitting part (5) is successively set on the same light path, photomultiplier tube detectors (7) is fixed on the light-emitting window of second light splitting part (5), fluorescence pond (4) is placed on the place, point of crossing of interior input path in sample chamber (3) and emitting light path, second light splitting part (5) is connected with computing machine (9) by its controller (6), and photomultiplier tube detectors (7) is connected with computing machine (9) by data collector (8).
2. concentration of pyridine farm chemical pick-up unit as claimed in claim 1 is characterized in that: described light source (1) is xenon lamp or deuterium lamp.
3. concentration of pyridine farm chemical pick-up unit as claimed in claim 1 is characterized in that: described first light splitting part (2) is monochromator or filter disc.
4. concentration of pyridine farm chemical pick-up unit as claimed in claim 1 is characterized in that: described second light splitting part (5) is monochromator or spectrometer.
5. concentration of pyridine farm chemical pick-up unit as claimed in claim 1 is characterized in that: described data collector (8) is data acquisition unit or single photon counter.
6. method that detects concentration of pyridine farm chemical with the described device of claim 1, it is characterized in that step comprises: the light that light source (1) is sent is selected the light of single wavelength in the 317-337nm scope with first light splitting part (2), come sample in the fluorescence excitation pond (4) with it, after being excited, sends sample fluorescence, second light splitting part (5) is set at 330-500nm scope interscan spectrum, photomultiplier tube detectors (7) is converted into electric signal with the spectral signal that scans and amplifies, send into computing machine (9) through data collector (8) and carry out data processing, adopt the offset minimum binary algorithm that spectroscopic data is analyzed, draw the concentration value of sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010106074A CN101788481A (en) | 2010-01-29 | 2010-01-29 | Device and method for detecting concentration of pyridine farm chemical |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010106074A CN101788481A (en) | 2010-01-29 | 2010-01-29 | Device and method for detecting concentration of pyridine farm chemical |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519916A (en) * | 2011-12-29 | 2012-06-27 | 江苏大学 | Method and device for on-line detecting concentration of pesticide |
| CN103063635A (en) * | 2012-12-28 | 2013-04-24 | 江苏大学 | On-line measuring device for mixing concentration field of plant protection machine |
| CN105372215A (en) * | 2014-09-02 | 2016-03-02 | 什邡市祥力机电有限公司 | Pesticide residue quantity detecting device and method |
| CN112525869A (en) * | 2020-07-13 | 2021-03-19 | 淮阴工学院 | Sectional type detection method for pesticide residues |
-
2010
- 2010-01-29 CN CN201010106074A patent/CN101788481A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519916A (en) * | 2011-12-29 | 2012-06-27 | 江苏大学 | Method and device for on-line detecting concentration of pesticide |
| CN102519916B (en) * | 2011-12-29 | 2014-05-28 | 江苏大学 | Method and device for on-line detecting concentration of pesticide |
| CN103063635A (en) * | 2012-12-28 | 2013-04-24 | 江苏大学 | On-line measuring device for mixing concentration field of plant protection machine |
| CN105372215A (en) * | 2014-09-02 | 2016-03-02 | 什邡市祥力机电有限公司 | Pesticide residue quantity detecting device and method |
| CN112525869A (en) * | 2020-07-13 | 2021-03-19 | 淮阴工学院 | Sectional type detection method for pesticide residues |
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Open date: 20100728 |