CN104833711A - Blood lead analysis instrument and blood lead measuring method therewith - Google Patents
Blood lead analysis instrument and blood lead measuring method therewith Download PDFInfo
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- CN104833711A CN104833711A CN201510102387.6A CN201510102387A CN104833711A CN 104833711 A CN104833711 A CN 104833711A CN 201510102387 A CN201510102387 A CN 201510102387A CN 104833711 A CN104833711 A CN 104833711A
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Abstract
The invention discloses a blood lead analysis instrument and a blood lead measuring method therewith. The blood lead analysis instrument includes a case, in which a lifting electrolytic tank structure, a three-electrode assembly, a circuit control part and a data processing part are arranged. The circuit control part includes a flow-guide dissolving-out control part. When the flow-guide dissolving-out control part controls flow-guide dissolving out, a counter electrode is connected in parallel with a reference electrode to generate electric potential dissolving out between the electrodes. The data processing part for processing test data is used for evaluating the blood lead content on the basis of a cadmium internal standard substance. The blood lead analysis instrument is accurate in measurement and is convenient to use. By means of a combined three-electrode module design of a program-control movable electrolytic tank, standardization and large-scale production of the blood lead analysis instrument can be achieved easily.
Description
Technical field
The present invention relates to a kind of blood lead analyser of potentiometric stripping type and measure blood lead method.
Background technology
Lead is toxic heavy metal, industrially of many uses, particularly the fast development of the Storage Battery Industry in China in recent years, and making operating worker absorb plumbous probability increases widely.In process of production, plumbous and compound mainly enters human body with the form of dust, smog or steam through respiratory tract, and cause the dysfunction of nearly all tract, especially blood and nervous system, cause saturnism.
Blood lead concentration is the sensitive indicator reflecting recent Exposure, and blood lead analysis method is numerous, common are atomic absorption spectrography (AAS), isotope dilution mass spectrometry, atomic fluorescence spectrum, Atomic Emission Spectral Analysis and On Potentiometric Stripping Analysis.Atomic absorption spectrography (AAS) due to the atom rate of element very low, its sensitivity does not reach the sensing range of human body lead element, often occurs false negative result, therefore superseded.Isotope dilution mass spectrometry is blood lead analysis is the most classical, the most accurately, and the most reliable method.But because its assay method is complicated, time-consuming, and instrument price is expensive, the method there is no value for clinical application.Atomic fluorescence spectrum is a kind of atom vapor by measuring element to be measured, launches atomic fluorescence, measure a kind of instrument analytical method of constituent content to be measured according to the intensity of fluorescent emission under the radiation excitation of certain wavelength.The method is highly sensitive, detect lower limit 1-2 the order of magnitude lower than atomic absorption method, in analytic curve linear relationship, disturbing effect and multielement analysis ability are all better than atomic absorption method, but it is comparatively serious by stray light effects, have impact on the universal of this method and development to a certain extent.Atomic Emission Spectral Analysis is the spectrum produced after being stimulated according to the gaseous atom of component or ion and the analytical approach set up.But poor to high-load ultimate analysis accuracy, need the contrast of a set of standard sample, practical operation inconvenience, instrument price costly, is promoted the use of and is restricted.On Potentiometric Stripping Analysis is a kind of emerging electrochemical analysis method, the method has high sensitivity, also there is very strong antijamming capability, effectively can prevent the interference of organic impurities etc. in solution, when to make in working sample the trace element such as plumbous, can measure without the need to digestion, easy running program.
Blood lead concentration measured by known potentiometric stripping type blood lead analyser, utilize three-electrode system in dissolution time, measure potentiometric stripping between working electrode and contrast electrode, obtain current potential-dissolution time curve, the direct method of measurement is adopted to read peak height value, cause the relative standard deviation RSD of measurement result large, RSD value all can be greater than 10% usually, badly influences precision of analysis.Reduce the deviation that RSD value is brought, just must be improved the parameter of being correlated with and method, and not yet find so far about the relevant report of this type of technology.The three-electrode system of blood lead analyser conventional in addition independently designs, and is unfavorable for the standardized production realizing blood lead analyser.
Summary of the invention
In order to solve the problems of the prior art, the object of this invention is to provide a kind of method of blood lead analyser and mensuration blood lead thereof, effectively improve the accuracy that blood lead is measured, blood lead analyser of the present invention is with the combination three-electrode module of program control mobile electrolytic cell, easy and simple to handle, be more conducive to the standardization and the production in enormous quantities that realize the manufacture of blood lead analyser.
For achieving the above object, the present invention is by the following technical solutions: a kind of blood lead analyser, comprise cabinet, lifting electrolyser construction is provided with in described cabinet, three electrode assemblies, control circui parts and data processor, three described electrode assemblies comprise electrode, contrast electrode and working electrode, it is characterized in that, described control circui parts comprise water conservancy diversion stripping control assembly, described water conservancy diversion stripping control assembly controls the mode of water conservancy diversion stripping, described water conservancy diversion stripping mode is, described in parallel with contrast electrode to electrode after and produce potentiometric stripping between working electrode, described data processor, for the treatment of test data.
Wherein, described lifting electrolyser construction comprises pop-up, undercarriage column, undercarriage, undercarriage pad and electric pushrod, described pop-up is fixedly connected on enclosure top, described undercarriage column is fixed on chassis backplane, described undercarriage column is provided with undercarriage pad, described undercarriage pad correspondence position is provided with undercarriage, described electric pushrod one end is connected to pop-up, the other end is connected with lifter plate with undercarriage pad through undercarriage, described lifter plate is fixedly connected with sliding curtain by lifting stationary shaft, described lifter plate is also connected with lifting shaft, described lifting shaft is provided with electrolytic cell to sit, described electrolytic cell is taken and is placed with electrolytic cell.
Wherein, described electrolytic cell is sat and is fixedly connected with lifting shaft by electrolytic cell seat bolt, and the diameter that described electrolytic cell is sat is adjustable.
Preferably, described electric pushrod is H type 50mm electric pushrod.
Preferably, three described electrode assemblies also comprise to be sat electrode, and described being fixed on electrode and contrast electrode is taken electrode, and three described electrode assemblie test leads enter electrolytic cell, make three-dimensional direction moving relative to electrolytic cell.
Preferably, described is Pt sheet to electrode.
Preferably, described contrast electrode is 232 saturated calomel electrodes.
Preferably, described working electrode is glass-carbon electrode, and described glass-carbon electrode outer tube adopts Peek material.
Preferably, described control circui parts also comprise lifting electrolytic cell control assembly, control electrolytic cell moving direction.
Preferably, described cabinet is also provided with dust-proof upper strata shutter.
Measure a method for blood lead, it is characterized in that, comprise the following steps:
Step one, adds blood lead reagent in blood sample to be measured and cadmium ion internal standard compound prepares solution to be measured, and solution to be measured is placed in electrolytic cell;
Step 2, utilizes blood lead analyser to carry out enrichment procedure to the solution in electrolytic cell, after enrichment a period of time, disconnects stripping power supply, by after in parallel with contrast electrode to electrode in blood lead analyser and produce potentiometric stripping between working electrode;
Step 3, the discrete signal point of current potential and dissolution time in obtaining step two;
Step 4, carries out 2 subdifferentials to discrete signal point in step 3 and Gauss normal distribution calculates, and connects these discrete signal points successively, obtains continuous curve, calculates whole peak height of component and the spike potential of correspondence in continuous curve;
Step 5, calculates correction coefficient K, wherein K=10/ cadmium ion internal standard compound peak height according to the cadmium ion internal standard compound peak height in step 4;
Step 6, the product of the discrete signal point in step 4 and K is formed one group of new discrete signal point, connect all discrete signal points and obtain a new continuous curve, to calculate in continuous curve all peak height of component and the spike potential of correspondence, obtain relative peak height;
Step 7, calculates with the relative peak height in step 6, obtains blood lead content in solution to be measured.
The beneficial effect that the present invention realizes is, the present invention adopts water conservancy diversion stripping control assembly to control the mode of water conservancy diversion stripping, can the Low ESR contrast electrode of conduction current to compose in parallel electrode and contrast electrode, and produce potentiometric stripping between working electrode, Low ESR contrast electrode current potential is stablized, and makes the mensuration of working electrode more accurate; The present invention adopts cadmium internal standard compound to be benchmark, with lead content in Relative Peak high praise blood, decreases operating conditions and solution dilution degree to the impact of peak height, reduces the relative deviation RSD value of existing blood lead analyser; The present invention adopts the combination three-electrode module of program control mobile electrolytic cell, easy to operate, is conducive to standardization and the production in enormous quantities of the manufacture of blood lead analyser.
Accompanying drawing explanation
The present invention is further described below in conjunction with the drawings and specific embodiments:
Fig. 1 is the three-dimensional structure diagram of blood lead analyser cabinet of the present invention;
Fig. 2 is the front view of blood lead analyser of the present invention;
Fig. 3 is the left view of blood lead analyser of the present invention;
Fig. 4 is the lifting electrolyser construction left view of blood lead analyser of the present invention;
Fig. 5 is the partial enlarged drawing to electrode assemblie and contrast electrode assembly of blood lead analyser of the present invention;
Fig. 6 is the partial enlarged drawing of the working electrode assembly of blood lead analyser of the present invention;
Fig. 7 is the circuit diagram of blood lead analyser water conservancy diversion stripping mode of the present invention;
Fig. 8 is the blood lead assay method block diagram of blood lead analyser of the present invention.
In diagram: 1, cabinet, 2, lifting electrolyser construction, 3, three electrode assemblies, 4, to electrode, 5, contrast electrode, 6, working electrode, 7, pop-up, 8, undercarriage column, 9, undercarriage, 10, undercarriage pad, 11, electric pushrod, 12, lifter plate, 13, lifting stationary shaft, 14, sliding curtain, 15, lifting shaft, 16, electrolytic cell is sat, 17, electrolytic cell, 18, bolt sat by electrolytic cell, 19, electrode is sat, 20, to electrode cap, 21, to electrode stem, 22, reference anchorage clip, 23, reference rotating clamp, 24, reference vertical rod, 25, rotation electrode motor, 26, electrode shaft coupling, 27, Z motor rack.
Embodiment
As Fig. 1, 2, 3, 4, 5, shown in 6, a kind of blood lead analyser, comprise cabinet 1, lifting electrolyser construction 2 is provided with in described cabinet 1, three electrode assemblies 3, control circui parts and data processor, described lifting electrolyser construction 2 comprises pop-up 7, undercarriage column 8, undercarriage 9, undercarriage pad 10 and electric pushrod 11, described pop-up 7 is fixedly connected on cabinet 1 top, described undercarriage column 8 is fixed on cabinet 1 base plate, described undercarriage column 8 is provided with undercarriage pad 10, described undercarriage pad 10 correspondence position is provided with undercarriage 9, described electric pushrod 11 one end is connected to pop-up 7, the other end is connected with lifter plate 12 with undercarriage pad 10 through undercarriage 9, described lifter plate 12 is fixedly connected with sliding curtain 14 by lifting stationary shaft 13, described lifter plate 12 is also connected with lifting shaft 15, described lifting shaft 15 is provided with electrolytic cell and sits 16, described electrolytic cell is sat on 16 and is placed with electrolytic cell 17.Described cabinet 1 is also provided with dust-proof upper strata shutter.
As Fig. 1,5, shown in 6, three described electrode assemblies 3 comprise electrode assemblie, contrast electrode assembly and working electrode assembly, described comprises electrode cap 20 to electrode assemblie, to electrode stem 21, to electrode seat 19 with to electrode 4,19 are sat to electrode and is connected with to electrode stem 21, to on electrode stem 21 by being connected with electrode cap 20 to electrode holding screw, electrode 4 is moved along doing Z-direction to electrode stem 21.Contrast electrode assembly comprises reference anchorage clip 22, reference rotating clamp 23 and contrast electrode 5, reference anchorage clip 22 is fixed in reference vertical rod 24 by reference holding screw, reference anchorage clip 22 is removable in Z-direction, and also can do circular arc and move, reference rotating clamp 23 clamps contrast electrode 5, be fixed on reference anchorage clip 22, contrast electrode 5 does three-dimensional direction moving relative to electrolytic cell, and contrast electrode 5 and being all fixed on electrode 4 is sat on 19 electrode, realizes the global design of three-electrode system.Working electrode assembly is made up of rotation electrode motor 25, electrode shaft coupling 26, working electrode 6, Z motor rack 27, the two carbon contact of gyro, GC contact conductor, and it is good that the two carbon contact of gyro has conduction, low noise, low linear velocity and wear-resisting advantage.Working electrode 6 is glass-carbon electrode, and the outer tube of glass-carbon electrode manufactures with Peek material, therefore has good inertia and rigidity.
If Fig. 7 is conductor stripping mode circuit diagram, R1=R2=100 Ω, R3=500 Ω.During enriched lead, K1, K2 are logical, and K3, K4, K5 are disconnected; During plumbous stripping, K1, K2 are disconnected, and K3, K4, K5 are logical.During stripping, by parallel to electrode 4 and contrast electrode 5, the current potential of contrast electrode 5 is more stable, and the data that working electrode 6 is tested are more accurate.
As the method block diagram that Fig. 8 is blood lead analysis-e/or determining blood lead of the present invention, comprise the steps:
Step one, adds blood lead reagent in blood sample to be measured and cadmium ion internal standard compound prepares solution to be measured, and solution to be measured is placed in electrolytic cell;
Step 2, utilizes blood lead analyser to carry out enrichment procedure to the solution in electrolytic cell, after enrichment a period of time, disconnects stripping power supply, by after in parallel with contrast electrode to electrode in blood lead analyser and produce potentiometric stripping between working electrode;
Step 3, the discrete signal point of current potential and dissolution time in obtaining step two;
Step 4, carries out 2 subdifferentials to discrete signal point in step 3 and Gauss normal distribution calculates, and connects these discrete signal points successively, obtains continuous curve, calculates whole peak height of component and the spike potential of correspondence in continuous curve;
Step 5, calculates correction coefficient K, wherein K=10/ cadmium ion internal standard compound peak height according to the cadmium ion internal standard compound peak height in step 4;
Step 6, the product of the discrete signal point in step 4 and K is formed one group of new discrete signal point, connect all discrete signal points and obtain a new continuous curve, to calculate in continuous curve all peak height of component and the spike potential of correspondence, obtain relative peak height;
Step 7, calculates with the relative peak height in step 6, obtains blood lead content in solution to be measured.
Blood lead reagent is added and cadmium ion internal standard compound prepares solution to be measured in blood sample to be measured, be placed in electrolytic cell 17, open blood lead analyser, will to electrode 4, contrast electrode 5 and working electrode 6 put into electrolytic cell 17, by control circui parts adjustment electrolytic cell 17 and three electrode position, measure after correct position, flow controlling parts are utilized to carry out in blood plumbous enrichment on the working electrode (s and stripping operation, the discrete signal point of record current potential and dissolution time, utilize data processor to carry out data processing, obtain lead content in blood.
The present invention adopts water conservancy diversion stripping control assembly to control the mode of water conservancy diversion stripping, can the Low ESR contrast electrode of conduction current to compose in parallel electrode and contrast electrode, and produce potentiometric stripping between working electrode, Low ESR contrast electrode current potential is stablized, and makes the mensuration of working electrode more accurate; The present invention adopts cadmium internal standard compound to be benchmark, with lead content in Relative Peak high praise blood, decreases operating conditions and solution dilution degree to the impact of peak height, reduces the relative deviation RSD value of existing blood lead analyser; The present invention adopts the combination three-electrode module of program control mobile electrolytic cell, easy to operate, is conducive to standardization and the production in enormous quantities of the manufacture of blood lead analyser.
Claims (10)
1. a blood lead analyser, comprise cabinet (1), lifting electrolyser construction (2) is provided with in described cabinet (1), three electrode assemblies (3), control circui parts and data processor, described three electrode assemblies (3) comprise electrode (4), contrast electrode (5) and working electrode (6), it is characterized in that
Described control circui parts comprise water conservancy diversion stripping control assembly, described water conservancy diversion stripping control assembly controls the mode of water conservancy diversion stripping, described water conservancy diversion stripping mode is, described produces potentiometric stripping afterwards and between working electrode (6) to electrode (4) is in parallel with contrast electrode (5);
Described data processor, for the treatment of test data.
2. blood lead analyser as claimed in claim 1, it is characterized in that, described lifting electrolyser construction (2) comprises pop-up (7), undercarriage column (8), undercarriage (9), undercarriage pad (10) and electric pushrod (11), described pop-up (7) is fixedly connected on cabinet (1) top, described undercarriage column (8) is fixed on cabinet (1) base plate, described undercarriage column (8) is provided with undercarriage pad (10), described undercarriage pad (10) correspondence position is provided with undercarriage (9), described electric pushrod (11) one end is connected to pop-up (7), the other end is connected with lifter plate (12) with undercarriage pad (10) through undercarriage (9), described lifter plate (12) is fixedly connected with sliding curtain (14) by lifting stationary shaft (13), described lifter plate (12) is also connected with lifting shaft (15), described lifting shaft (15) is provided with electrolytic cell and sits (16), described electrolytic cell is sat on (16) and is placed with electrolytic cell (17).
3. blood lead analyser as claimed in claim 2, it is characterized in that, described electric pushrod (11) is H type 50mm electric pushrod, described electrolytic cell seat (16) is sat bolt (18) by electrolytic cell and is fixedly connected with lifting shaft (15), and the diameter that described electrolytic cell sits (16) is adjustable.
4. blood lead analyser as claimed in claim 1, it is characterized in that, described three electrode assemblies (3) also comprise sits (19) to electrode, described being fixed on electrode (4) and contrast electrode (5) is sat on (19) to electrode, three described electrode assemblie test leads enter electrolytic cell (17), make three-dimensional direction moving relative to electrolytic cell (17).
5. blood lead analyser as claimed in claim 1, it is characterized in that, described is Pt sheet to electrode (4).
6. blood lead analyser as claimed in claim 1, it is characterized in that, described contrast electrode (5) is 232 saturated calomel electrodes.
7. blood lead analyser as claimed in claim 1, it is characterized in that, described working electrode (6) is glass-carbon electrode, and described glass-carbon electrode outer tube adopts Peek material.
8. blood lead analyser as claimed in claim 1, is characterized in that, described control circui parts also comprise lifting electrolytic cell control assembly, control electrolytic cell moving direction.
9. blood lead analyser as claimed in claim 1, it is characterized in that, described cabinet is also provided with dust-proof upper strata shutter.
10. a blood lead assay method, is characterized in that, comprises the following steps:
Step one, adds blood lead reagent in blood sample to be measured and cadmium ion internal standard compound prepares solution to be measured, and solution to be measured is placed in electrolytic cell;
Step 2, utilizes blood lead analyser to carry out enrichment procedure to the solution in electrolytic cell, after enrichment a period of time, disconnects stripping power supply, by after in parallel with contrast electrode to electrode in blood lead analyser and produce potentiometric stripping between working electrode;
Step 3, the discrete signal point of current potential and dissolution time in obtaining step two;
Step 4, carries out 2 subdifferentials to discrete signal point in step 3 and Gauss normal distribution calculates, and connects these discrete signal points successively, obtains continuous curve, calculates whole peak height of component and the spike potential of correspondence in continuous curve;
Step 5, calculates correction coefficient K, wherein K=10/ cadmium ion internal standard compound peak height according to the cadmium ion internal standard compound peak height in step 4;
Step 6, the product of the discrete signal point in step 4 and K is formed one group of new discrete signal point, connect all discrete signal points and obtain a new continuous curve, to calculate in continuous curve all peak height of component and the spike potential of correspondence, obtain relative peak height;
Step 7, calculates with the relative peak height in step 6, obtains blood lead content in solution to be measured.
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| CN202837232U (en) * | 2012-10-15 | 2013-03-27 | 北京赛必达科技有限公司 | Online heavy metal early-warning detection system |
| CN103659226A (en) * | 2013-12-17 | 2014-03-26 | 苏州博众精工科技有限公司 | Lifting mechanism |
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2015
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4090926A (en) * | 1974-09-11 | 1978-05-23 | Environmental Sciences, Inc. | Testing product |
| CN2548158Y (en) * | 2002-06-20 | 2003-04-30 | 复旦大学 | Disposable electrochemical sensor for measuring blood lend concentration |
| CN101424693A (en) * | 2008-12-08 | 2009-05-06 | 盛青松 | Portable plumbum ion concentration analyzer using disposable sensor |
| CN201340408Y (en) * | 2008-12-12 | 2009-11-04 | 鹤壁电子研究所有限公司 | High-efficient energy-saving full automatic sulphur determinator |
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| CN102323322A (en) * | 2011-05-18 | 2012-01-18 | 齐齐哈尔医学院 | Serial electrolytic cell stripping analysis blood lead measuring device |
| CN202837232U (en) * | 2012-10-15 | 2013-03-27 | 北京赛必达科技有限公司 | Online heavy metal early-warning detection system |
| CN103659226A (en) * | 2013-12-17 | 2014-03-26 | 苏州博众精工科技有限公司 | Lifting mechanism |
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