CN103575666A - Online photoelectric detection device and detection method for residual concentration of corrosion inhibitor - Google Patents
Online photoelectric detection device and detection method for residual concentration of corrosion inhibitor Download PDFInfo
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- CN103575666A CN103575666A CN201210262123.3A CN201210262123A CN103575666A CN 103575666 A CN103575666 A CN 103575666A CN 201210262123 A CN201210262123 A CN 201210262123A CN 103575666 A CN103575666 A CN 103575666A
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- 238000005260 corrosion Methods 0.000 title claims abstract description 48
- 230000007797 corrosion Effects 0.000 title claims abstract description 48
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 239000003112 inhibitor Substances 0.000 title claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 27
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 20
- 238000005070 sampling Methods 0.000 claims abstract description 19
- 238000004458 analytical method Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 16
- 229910052724 xenon Inorganic materials 0.000 claims abstract description 15
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000010521 absorption reaction Methods 0.000 claims description 20
- 238000002835 absorbance Methods 0.000 claims description 19
- 239000006210 lotion Substances 0.000 claims description 17
- 238000005406 washing Methods 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 12
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 8
- 238000002798 spectrophotometry method Methods 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000002834 transmittance Methods 0.000 claims description 5
- JKYKXTRKURYNGW-UHFFFAOYSA-N 3,4-dihydroxy-9,10-dioxo-9,10-dihydroanthracene-2-sulfonic acid Chemical compound O=C1C2=CC=CC=C2C(=O)C2=C1C(O)=C(O)C(S(O)(=O)=O)=C2 JKYKXTRKURYNGW-UHFFFAOYSA-N 0.000 claims description 4
- IQFVPQOLBLOTPF-HKXUKFGYSA-L congo red Chemical compound [Na+].[Na+].C1=CC=CC2=C(N)C(/N=N/C3=CC=C(C=C3)C3=CC=C(C=C3)/N=N/C3=C(C4=CC=CC=C4C(=C3)S([O-])(=O)=O)N)=CC(S([O-])(=O)=O)=C21 IQFVPQOLBLOTPF-HKXUKFGYSA-L 0.000 claims description 4
- YQGOJNYOYNNSMM-UHFFFAOYSA-N eosin Chemical compound [Na+].OC(=O)C1=CC=CC=C1C1=C2C=C(Br)C(=O)C(Br)=C2OC2=C(Br)C(O)=C(Br)C=C21 YQGOJNYOYNNSMM-UHFFFAOYSA-N 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000012517 data analytics Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000000605 extraction Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 238000004611 spectroscopical analysis Methods 0.000 abstract 1
- 238000011410 subtraction method Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 15
- 239000012530 fluid Substances 0.000 description 10
- 238000000862 absorption spectrum Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- -1 alkyl imidazoline Chemical compound 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012417 linear regression Methods 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 239000012088 reference solution Substances 0.000 description 1
- 238000010850 salt effect Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
An online photoelectric detection device and a detection method for the residual concentration of a corrosion inhibitor are characterized in that a peristaltic pump (7) can directly sample and send the sample into a flow colorimetric pool (13), and a central processing unit (8) is connected with a xenon lamp (11), a sample injection valve (6) and the peristaltic pump (7) through cables; miningThe diode array photoelectric converter 14 is used for realizing non-scanning type rapid spectroscopic analysis, and reducing interferents by a background subtraction method, thereby realizing accurate measurement of the residual concentration of the corrosion inhibitor. The invention has compact structure and convenient operation, and is used for CO in oil fields2During the oil displacement downhole output detection, the device can be independently installed on an oil extraction (gas production) process for automatic timing sampling analysis, thereby avoiding missing detection and false detection caused by human factors and ensuring the accuracy of corrosion inhibitor concentration detection and analysis.
Description
Technical field: the present invention relates to a kind of optical analysis pick-up unit, especially for detecting oil field CO
2the online photoelectric detection system of a kind of corrosion inhibiter residual concentration and the detection method of displacement of reservoir oil down-hole production fluid.
Background technology: before the present invention; each oil field adopts photoelectricity (fluorescence, ultraviolet or visible ray colour developing) analyser to carry out offline inspection for corrosion inhibiter residual concentration in the production fluid of down-hole more; although existing apparatus is simple for use; but get at the regularly artificial scene of needs, sample presentation; complex operation not only; also may, because human factor causes undetected, flase drop, affect and detect the effect of analyzing; Meanwhile, the high-pressure sodium lamp light source of the relatively high power adopting and scan-type rotating shutter power consumption is large, mechanical stability is poor, is unsuitable for using under the rugged surroundings such as field condition.
Summary of the invention: the object of the invention is: be oil field CO
2displacement of reservoir oil down-hole production fluid detects provides a kind of corrosion inhibiter residual concentration online photoelectric detection system, because this device has increased online sampling mechanism, be arranged in oil recovery (gas production) flow process, can control automatic time sampling by central processing unit and detect analysis, thereby without artificial scene regularly get, sample presentation, not only simplify running program, also can avoid undetected, the flase drop that cause due to human factor, guaranteed to detect the ageing and accuracy of analysis result.Meanwhile, also adopt low-power high-voltage xenon flash light source and diode array photoelectric commutator as photosensitive device, without rotating shutter, can be suitable for using under the rugged surroundings such as non-transformer scene, field.
The object of the invention is to realize by following measures: the online photoelectric detection system of a kind of corrosion inhibiter residual concentration is to consist of feed tube, separation vessel, filtrator, washing lotion groove, washing lotion valve, sampling valve, peristaltic pump, central processing unit, battery, PORT COM, xenon lamp, monochromator, flow colorimetric pond, diode array photoelectric commutator, analog to digital converter, waste liquid tank; And by feed tube, by pipeline, connect separation vessel, filtrator, sampling valve, peristaltic pump and form sampling mechanism; By the central processing unit with battery, by cable connection mode number converter, PORT COM, flow colorimetric pond, form testing agency; Central processing unit is connected with sampling valve, peristaltic pump, washing lotion valve by cable, and peristaltic pump intake pipeline connects a washing lotion groove by washing lotion valve, and flow colorimetric pond connects a waste liquid tank by pipeline; It is characterized in that peristaltic pump export pipeline directly stretches in flow colorimetric pond, central processing unit is connected by cable and xenon lamp and monochromator, diode array photoelectric commutator.
The object of the invention is to realize by following measures: the online photoelectric detecting method of a kind of corrosion inhibiter residual concentration, comprise ultraviolet spectrophotometry, background deduction algorithm and microprocessor data analytic system, it is characterized in that adopting background deduction algorithm in ultraviolet spectrophotometry, the absorption peak of chaff interference in detection liquid is carried out to bales catch to be removed, and then calculate transmittance, absorbance, wavelength value, by interpolation analysis, calculate density of corrosion inhibitor.
Object of the present invention can also realize by following measures: low-power high-voltage xenon flash light source is to form monochromatic source by C-T monochromator, and imports flow colorimetric pond; Adopt diode array photoelectric commutator to replace rotating shutter as photosensitive device; Quaternary ammonium salt and organophosphate corrosion inhibiter to ultraviolet region without characteristic absorption peak, in separated water sample, to add 10 ~ 100mg/L sodium alizarinsulfonate or eosin W or W S or Congo red developer to react with it, form ultraviolet characteristic absorption peak, then extrapolate its concentration by typical curve.
Compact conformation of the present invention, easy to operate, for oil field CO
2during displacement of reservoir oil down-hole production fluid detects, can independently be arranged in oils recovery (gas production) flow process automatic time sampling and detect and analyze, avoid undetected, the flase drop that cause due to human factor, guarantee to detect the effect of analysis.Meanwhile, also adopt xenon source and the diode array photoelectric commutator of low-power consumption, can be suitable for using under the rugged surroundings such as field non-transformer.
Accompanying drawing explanation:
Fig. 1 is the structural representation of the online photoelectric detection system of corrosion inhibiter residual concentration.
Fig. 2 is corrosion inhibiter residual concentration pick-up unit analytical approach process flow diagram.
Fig. 3 is the ultra-violet absorption spectrum of alkyl imidazoline corrosion inhibiter in the water of oil field.
Fig. 4 is the linear relationship between absorbance and imidazoline inhibitor concentration.
Fig. 5 is the relation curve between absorbance and density of corrosion inhibitor.
Fig. 6 is the residual concentration of quaternary ammonium salt corrosion inhibitor and the relation curve of absorbance.
Embodiment: the online photoelectric detection system of corrosion inhibiter residual concentration is to consist of feed tube 1, separation vessel 2, filtrator 3, washing lotion groove 4, washing lotion valve 5, sampling valve 6, peristaltic pump 7, central processing unit 8, battery 9, PORT COM 10, xenon lamp 11, monochromator 12, flow colorimetric pond 13, diode array photoelectric commutator 14, analog to digital converter 15 and waste liquid tank 16; By feed tube 1, by pipeline, connect separation vessel 2, filtrator 3, sampling valve 6, peristaltic pump 7 and form sampling mechanism; By the central processing unit 8 with battery 9, by cable connection mode number converter 15, PORT COM 10, flow colorimetric pond 13, form testing agency; Central processing unit 8 is connected with sampling valve 6, peristaltic pump 7, washing lotion valve 5 by cable; Peristaltic pump 7 intake pipelines connect a washing lotion groove 4 by washing lotion valve 5, and flow colorimetric pond 13 connects a waste liquid tank 16 by pipeline; Peristaltic pump 7 export pipelines directly stretch in flow colorimetric pond 13, and central processing unit 8 is connected by cable and xenon lamp 11 and monochromator 12, diode array photoelectric commutator 14.
The principle of work of the online photoelectric detection system of corrosion inhibiter residual concentration with using method is: first by feed tube 1, this device is connected, is located with down-hole production fluid flow process to be detected, by central processing unit 8, set and detect routine analyzer again, just can enter duty.When need carry out production fluid analysis, under controlling, central processing unit 8 opens sampling valve 6 and peristaltic pump 7, down-hole production fluid in flow process passes through feed tube 1, separation vessel 2, filtrator 3, sampling valve 6, by peristaltic pump 7, pumped in flow colorimetric pond 13, as sample, for Photoelectric Detection analysis, after having analyzed, in flow colorimetric pond 13, enter waste liquid tank 16, the down-hole production fluid entering before flow colorimetric pond 13 need pass through oil and water separation, the processing such as filtration, reach after photoelectric analysis sample standard, by central processing unit 8, start xenon lamp 11, after the sample that the ultraviolet light of its transmitting sees through in flow colorimetric pond 13 by monochromator 12, by diode array photoelectric commutator 14, carry out opto-electronic conversion, electric signal is converted to digital signal by analog to digital converter 15 and imports central processing unit 8 into, and form final detection analysis result by data processing, this analysis result can directly be stored in central processing unit 8, also can upload to PC by PORT COM 10.After each detection analysis completes, by central processing unit 8, automatically close sampling valve 6 and xenon lamp 11 etc., open washing lotion valve 5 simultaneously, use the cleaning fluid in washing lotion groove 4 to clean peristaltic pump 7, flow colorimetric pond 13.Because this device adopts battery 9 power supplies, thereby can independently be arranged in the flow process of oil field well production fluid convenient use; Also because this device operation is controlled automatically by central processing unit 8 programmings, thus without regularly artificial scene get, sample presentation, not only simplified running program, also can avoid undetected, the flase drop that cause due to human factor, guaranteed to detect the effect of analyzing.
Principle of work and the using method of the online photoelectric analysis detection method of corrosion inhibiter residual concentration are: comprise ultraviolet spectrophotometry, background deduction algorithm and microprocessor data analytic system, and in ultraviolet spectrophotometry, adopt background deduction algorithm, the absorption peak of chaff interference in detection liquid is carried out to bales catch to be removed, and then calculate transmittance, absorbance, wavelength value, by interpolation analysis, calculate density of corrosion inhibitor.Simultaneously, quaternary ammonium salt and organophosphate corrosion inhibiter to ultraviolet region without characteristic absorption peak, be in separated water sample, to add 10 ~ 100mg/L sodium alizarinsulfonate or eosin W or W S or Congo red developer to react with it, form ultraviolet characteristic absorption peak, then extrapolate its concentration by typical curve.
Because corrosion inhibiter belongs to organic compound more, at the characteristic absorption spectrum of ultraviolet region tool, therefore available ultraviolet spectrophotometry is carried out quantitative measurement to corrosion inhibiter residual concentration.Ultraviolet Photometric Method quantitative measurement according to being that lambert-than ear (Lamber t-Beer) law formula (1), material is proportional at the thickness of certain density absorbance and its absorbing medium.While measuring density of corrosion inhibitor, first determine the ultra-violet absorption spectrum of corrosion inhibiter, determine maximum absorption wavelength.Under selected wavelength, make the absorbance working curve of corrosion inhibitor solution, according to the absorbance that records under the same conditions liquid to be measured, by comparing with working curve the content of determining corrosion inhibiter in solution.
Wherein, A is absorbance, and T is transmittance, and e is absorptivity, and L is cuvette thickness, and c is sample concentration;
After differential:
According to formula (2), when A=0.4343, absorbance measuring error is minimum.
In imidazoline inhibitor molecule, have conjugation group, at 235nm place, have strong uv absorption, its essence is the luminous energy that the chemical bond in molecule has absorbed some specific wavelength in incident light, and molecular vibrational energy order transition and transition of electronic energy have occurred accordingly.Because various materials have different separately molecules, atom and different spatial configuration of molecules, its situation that absorbs luminous energy also just can not be identical.Therefore, every kind of material just has its distinctive, fixing absorption spectrum curve, can just differentiate or measure according to the absorbance of some the characteristic wave strong point on absorption spectrum the content of this material.
For the concentration determination that there is no the quaternary ammonium salt corrosion inhibitor of uv absorption, often utilizing chromogenic reaction is in certain wavelength coverage, to have the material of absorption by tested constitutional changes.Common chromogenic reaction has coordination reaction, redox reaction etc.
Residual oil in the water of oil field can disturb the uv absorption of corrosion inhibiter, adopts oil-containing (not containing corrosion inhibiter) reference solution to carry out absorbance background deduction, can significantly improve the sensitivity that corrosion inhibiter ultraviolet detects; For low concentration corrosion inhibiter residual concentration, adopt background deduction method can oil field water in residual concentration detectability bring up to 1.0mg/L.
This method is to carry out according to the operating process of Fig. 2.First by central processing unit 8, start software, determine the parameters such as wavelength scanning range and integral time, by central processing unit 8, start xenon lamp 11 again, light beam is through monochromator 12 and flow colorimetric pond 13, after being partially absorbed by sample, enter diode array photoelectric commutator 14 and carry out opto-electronic conversion, then by analog to digital converter 15, carry out digitizing, and measurement result is sent into central processing unit 8, after calculating transmittance and absorbance by central processing unit 8, carry out linear regression with the standard absorbance value of variable concentrations, finally by working curve, shown the residual concentration of corrosion inhibiter.Fig. 3 is the alkyl imidazoline corrosion inhibiter of the employing standard ultraviolet spectrometer (UVS) test ultra-violet absorption spectrum in detecting liquid, shows that this corrosion inhibiter goes out to have strong absorption peak at 235nm, and this is the uv absorption causing due to the two keys of C=N in imidazoline five-membered ring.Fig. 4 has shown absorbance that standard ultraviolet spectrometer (UVS) is measured and the linear relationship between imidazoline inhibitor concentration.Fig. 5 shows the relation curve based between absorbance and density of corrosion inhibitor, and between the two, linear relationship is good as seen.Fig. 6 is based on this quaternary ammonium salt or the residual concentration of organophosphate corrosion inhibiter and the relation curve of absorbance, in quaternary ammonium salt molecule, there is no conjugated structure, and himself can not directly measure its residual concentration without uv absorption.But by add the sodium alizarinsulfonate of 10 ~ 100mg/L or eosin W or W S or the developer such as Congo red in solution example, developer reacts with quaternary ammonium salt and generates the molecule with characteristic ultraviolet absorption, can indirectly measure accordingly the residual concentration of quaternary ammonium salt corrosion inhibitor in sample; In Fig. 6 developer can with quaternary ammonium salt effect, at 516nm place, have maximum absorption wavelength, and along with quaternary ammonium salt corrosion inhibitor concentration increases, uv absorption intensity declines gradually, and between absorbance and density of corrosion inhibitor, linear relationship is good.
Claims (5)
1. the online photoelectric detection system of corrosion inhibiter residual concentration, is to consist of feed tube, separation vessel, filtrator, washing lotion groove, washing lotion valve, sampling valve, peristaltic pump, central processing unit, battery, PORT COM, xenon lamp, monochromator, flow colorimetric pond, diode array photoelectric commutator, analog to digital converter, waste liquid tank; And by feed tube, by pipeline, connect separation vessel, filtrator, sampling valve, peristaltic pump and form sampling mechanism; By the central processing unit with battery, by cable connection mode number converter, PORT COM, flow colorimetric pond, form testing agency; Central processing unit is connected with sampling valve, peristaltic pump, washing lotion valve by cable, and peristaltic pump intake pipeline connects a washing lotion groove by washing lotion valve, and flow colorimetric pond connects a waste liquid tank by pipeline; It is characterized in that: peristaltic pump export pipeline directly stretches in flow colorimetric pond, central processing unit is connected by cable and xenon lamp and monochromator, diode array photoelectric commutator.
2. the online photoelectric detecting method of corrosion inhibiter residual concentration, comprise ultraviolet spectrophotometry, background deduction algorithm and microprocessor data analytic system, it is characterized in that: in ultraviolet spectrophotometry, adopt background deduction algorithm, the absorption peak of chaff interference in detection liquid is carried out to bales catch to be removed, and then calculate transmittance, absorbance, wavelength value, by interpolation analysis, calculate density of corrosion inhibitor.
3. the online photoelectric detection system of corrosion inhibiter residual concentration according to claim 1, is characterized in that: described xenon lamp is low-power high-voltage pulse xenon lamp, and its light source is to form monochromatic source by C-T monochromator, and imports flow colorimetric pond.
4. according to the online photoelectric detection system of corrosion inhibiter residual concentration described in claim 1 or 3, it is characterized in that: adopt diode array photoelectric commutator to replace rotating shutter as photosensitive device.
5. the online photoelectric detecting method of corrosion inhibiter residual concentration according to claim 2, it is characterized in that: quaternary ammonium salt and organophosphate corrosion inhibiter to ultraviolet region without characteristic absorption peak, in separated water sample, to add 10 ~ 100mg/L sodium alizarinsulfonate or eosin W or W S or Congo red developer to react with it, form ultraviolet characteristic absorption peak, then extrapolate its concentration by typical curve.
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Cited By (8)
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| CN105717054A (en) * | 2016-02-22 | 2016-06-29 | 石家庄给源环保科技有限公司 | Detection method and detection device for online detection of scale and corrosion inhibitor concentration in circulating cooling water and circulating cooling water treatment control system |
| CN105911990A (en) * | 2016-05-23 | 2016-08-31 | 吉林大学 | Track bias determination method for ship sailing turning phase |
| CN106596888A (en) * | 2016-12-12 | 2017-04-26 | 刘邦楠 | Online water quality detection system employing terminal and cellphone |
| CN107907496A (en) * | 2017-10-26 | 2018-04-13 | 西南石油大学 | A kind of density of corrosion inhibitor distribution tests field test device and method |
| CN109142224A (en) * | 2018-10-12 | 2019-01-04 | 山东师范大学 | A kind of intelligent portable ammonia nitrogen detector |
| CN109374608A (en) * | 2018-10-18 | 2019-02-22 | 东北大学 | A kind of method of spectrophotometry amine collector |
| CN112504980A (en) * | 2020-11-20 | 2021-03-16 | 中国石油工程建设有限公司华北分公司 | Detection method of imidazoline corrosion inhibitor and application thereof |
| CN115436306A (en) * | 2022-09-21 | 2022-12-06 | 中国石油大学(华东) | Imidazoline corrosion inhibitor residual concentration detection device and detection method thereof |
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| CN105717054A (en) * | 2016-02-22 | 2016-06-29 | 石家庄给源环保科技有限公司 | Detection method and detection device for online detection of scale and corrosion inhibitor concentration in circulating cooling water and circulating cooling water treatment control system |
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| CN105911990B (en) * | 2016-05-23 | 2018-11-30 | 吉林大学 | Course-line deviation measuring method for the ship's navigation turning stage |
| CN106596888A (en) * | 2016-12-12 | 2017-04-26 | 刘邦楠 | Online water quality detection system employing terminal and cellphone |
| CN107907496A (en) * | 2017-10-26 | 2018-04-13 | 西南石油大学 | A kind of density of corrosion inhibitor distribution tests field test device and method |
| CN107907496B (en) * | 2017-10-26 | 2020-03-27 | 西南石油大学 | Corrosion inhibitor concentration distribution test field test device and method |
| CN109142224A (en) * | 2018-10-12 | 2019-01-04 | 山东师范大学 | A kind of intelligent portable ammonia nitrogen detector |
| CN109374608A (en) * | 2018-10-18 | 2019-02-22 | 东北大学 | A kind of method of spectrophotometry amine collector |
| CN109374608B (en) * | 2018-10-18 | 2021-05-28 | 东北大学 | Method for detecting amine collecting agent by spectrophotometry |
| CN112504980A (en) * | 2020-11-20 | 2021-03-16 | 中国石油工程建设有限公司华北分公司 | Detection method of imidazoline corrosion inhibitor and application thereof |
| CN115436306A (en) * | 2022-09-21 | 2022-12-06 | 中国石油大学(华东) | Imidazoline corrosion inhibitor residual concentration detection device and detection method thereof |
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