CN114323844A - Method for measuring metal elements in organic matters - Google Patents
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- CN114323844A CN114323844A CN202111544138.4A CN202111544138A CN114323844A CN 114323844 A CN114323844 A CN 114323844A CN 202111544138 A CN202111544138 A CN 202111544138A CN 114323844 A CN114323844 A CN 114323844A
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- 238000000034 method Methods 0.000 title claims abstract description 34
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- 230000001804 emulsifying effect Effects 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 238000009616 inductively coupled plasma Methods 0.000 claims description 11
- 238000004945 emulsification Methods 0.000 claims description 8
- 239000005416 organic matter Substances 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 239000012456 homogeneous solution Substances 0.000 claims description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052791 calcium Inorganic materials 0.000 claims description 6
- 239000011575 calcium Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 5
- 229920004890 Triton X-100 Polymers 0.000 claims description 5
- 239000013504 Triton X-100 Substances 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 claims description 5
- 229910052700 potassium Inorganic materials 0.000 claims description 5
- 239000011591 potassium Substances 0.000 claims description 5
- 239000004215 Carbon black (E152) Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000005187 foaming Methods 0.000 claims description 4
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- 239000011133 lead Substances 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 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 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- WGIMXKDCVCTHGW-UHFFFAOYSA-N 2-(2-hydroxyethoxy)ethyl dodecanoate Chemical class CCCCCCCCCCCC(=O)OCCOCCO WGIMXKDCVCTHGW-UHFFFAOYSA-N 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
- NWGKJDSIEKMTRX-BFWOXRRGSA-N [(2r)-2-[(3r,4s)-3,4-dihydroxyoxolan-2-yl]-2-hydroxyethyl] (z)-octadec-9-enoate Chemical class CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)C1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-BFWOXRRGSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052788 barium Inorganic materials 0.000 claims description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052793 cadmium Inorganic materials 0.000 claims description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 2
- 230000032798 delamination Effects 0.000 claims description 2
- 229910052744 lithium Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 claims description 2
- 229920000136 polysorbate Polymers 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000011368 organic material Substances 0.000 claims 3
- 238000002604 ultrasonography Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 34
- 239000012086 standard solution Substances 0.000 description 27
- 238000011084 recovery Methods 0.000 description 10
- 238000004458 analytical method Methods 0.000 description 7
- 239000003153 chemical reaction reagent Substances 0.000 description 6
- 238000000605 extraction Methods 0.000 description 6
- 238000002835 absorbance Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 description 4
- IYFATESGLOUGBX-YVNJGZBMSA-N Sorbitan monopalmitate Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O IYFATESGLOUGBX-YVNJGZBMSA-N 0.000 description 3
- 238000007865 diluting Methods 0.000 description 3
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 3
- 229920000053 polysorbate 80 Polymers 0.000 description 3
- 235000012424 soybean oil Nutrition 0.000 description 3
- 239000003549 soybean oil Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 2
- 150000001492 aromatic hydrocarbon derivatives Chemical class 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- IIGMITQLXAGZTL-UHFFFAOYSA-N octyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCCCCCCC IIGMITQLXAGZTL-UHFFFAOYSA-N 0.000 description 2
- 208000019206 urinary tract infection Diseases 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 238000000184 acid digestion Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000001345 alkine derivatives Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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- 150000004820 halides Chemical class 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
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- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides a method for measuring metal elements in organic matters, which comprises the steps of emulsifying the organic matters by using an emulsifying agent, and measuring the content of the metal elements in the organic matters by adopting a standard addition method, wherein the organic matters are liquid at normal temperature. The invention has the advantages of simple steps, high efficiency and accuracy, and is suitable for real-time monitoring.
Description
Technical Field
The invention belongs to the field of component analysis and detection, and particularly relates to a method for measuring the content of metal elements in organic matters.
Background
The determination of the content of metal elements in organic matters can directly dilute and sample in water except for samples which are easy to dissolve in water, and other organic matters which are not soluble in water are mainly determined by an Atomic Absorption Spectrometer (AAS), an inductively coupled plasma emission spectrometer (ICP OES) or an inductively coupled plasma mass spectrometer (ICP MS) after the samples are treated by high-temperature ignition of a muffle furnace, acid digestion after ignition and combustion, extraction, organic solvent dilution and the like at present. The above various treatment methods have certain problems and disadvantages.
When organic matters are treated at high temperature in a muffle furnace, phenomena such as splashing or black smoke fly ash and the like are easily generated, and partial metal elements are easily splashed along with a sample and are easily lost along with the fly ash in the process, so that the result is low.
The extraction method adopts an aqueous solution of acid (such as nitric acid, hydrochloric acid and the like) as an extracting agent, and after the sample is mixed and oscillated with the acid solution, an emulsification phenomenon usually occurs, the emulsion is difficult to break, the sample can only be stood for a long time for delamination, the process usually needs to be over night, and the consumed time is too long. In the extraction treatment process, most of metal elements in a sample can be dissolved in an acid solution, but the extraction is incomplete, so that experimental errors are increased by two or more times of extraction, complete extraction cannot be guaranteed, and the result is inaccurate.
When an organic solution is adopted to dilute a sample for sample injection test, a standard curve prepared by an organic solvent has background difference with a system containing the sample, and the slope and intercept of the standard curve may have deviation under the two conditions of the sample and the non-sample, so that the standard curve prepared by the organic solvent may not be suitable for the detection of the sample, and the result is inaccurate.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for measuring organic metal elements, which does not damage any organic matrix and maintains the uniformity and stability of a system.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for measuring metal elements in organic substances comprises the steps of emulsifying the organic substances by using an emulsifying agent, and measuring the content of the metal elements in the organic substances by adopting a standard addition method, wherein the organic substances are liquid organic substances at normal temperature.
The method comprises the following specific steps:
mixing the sample with emulsifier solution of certain concentration, adding metal element standard substances of different concentrations from low to high, and emulsifying to obtain the final productTesting by an atomic absorption spectrometer and other instruments after the homogeneous system, drawing a standard curve by taking the absorbance or signal intensity of each metal element as a horizontal coordinate and the concentration of the standard substance as a vertical coordinate to obtain the intercept of each linear equation, namely the content B of each metal element in the sample and emulsifier mixed systemi。
Adding metal element standard substances with different concentrations into the emulsifier solution to prepare standard curve points, detecting with atomic absorption spectrometer, drawing standard curve to obtain intercept of linear equations, i.e. content C of each metal element in the emulsifier solution0i。
From BiAnd C0iAnd calculating the content of each metal element in the sample by using the value.
The calculation formula is shown as the following formula:
the content of metal element in the sample is (B)i*VGeneral assembly-C0i*VLiquid for treating urinary tract infection)/m
Bi-the intercept of the equation for metallic element (metallic element content in the overall system), mg/L;
Vgeneral assembly-total system volume, ml;
C0i-the content of metallic elements in the emulsifier solution, mg/L;
Vliquid for treating urinary tract infection-volume of emulsifier solution, ml;
m- -sample mass, g.
In order to avoid uneven distribution of the final emulsion, the emulsifier is a non-foaming emulsifier or a low-foaming emulsifier as a further improvement of the technical scheme. If a small amount of foam is present after emulsification, it can be stirred for defoaming and tested again.
As a further improvement of the technical scheme, the emulsifier is at least one of Tween series, Triton X-100, OP-10, Span series, Atlas G series, Solulan series, Emcol series, Atmul series, Glucate series, Glaurin series and Arlacel series, and two or more emulsifiers can be matched for emulsification according to different samples.
As a further improvement of the technical scheme, in order to meet the requirement of organic emulsification and reduce waste, before the organic emulsification, pure water is used for preparing an emulsifier solution, and the proportion of the emulsifier in the emulsifier solution is 0.1-20 wt%.
As a further improvement of the technical scheme, in order to meet the requirement of organic matter emulsification and reduce waste, the organic matter sample accounts for 0.1-20wt% of the homogeneous solution in the homogeneous solution obtained by mixing the organic matter sample and the emulsifier solution.
As a further improvement of the technical scheme, after the organic sample is mixed with the emulsifier solution, the sample is emulsified into the homogeneous solution in an oscillation, stirring or ultrasonic mode, and the homogeneous solution does not generate a layering phenomenon within 1h, so that the test result is more accurate.
As a further improvement of the technical scheme, the testing instrument adopted by the measuring method is an atomic absorption spectrometer, an inductively coupled plasma emission spectrometer or an inductively coupled plasma mass spectrometer.
As a further improvement of the technical proposal, the metal elements measured by the measuring method are potassium, sodium, calcium, magnesium, zinc, iron, copper, chromium, lead, aluminum, cadmium, nickel, barium or lithium.
As a further improvement of the technical scheme, the organic matter is at least one of hydrocarbon and hydrocarbon derivatives, including alkane, alkene, alkyne, aromatic hydrocarbon, hydrocarbon derivatives, and hydrocarbon derivatives including halides, alcohols, aldehydes, acids, phenols, esters, ethers, ketones, and the like, and also includes a mixture of two or more of the above organic matters.
Compared with the prior art, the method has outstanding substantive characteristics and remarkable progress, and particularly, the method adopts a pretreatment step of emulsifying organic matters, and emulsifies a sample into a stable homogeneous system by using an emulsifier, so that any organic matrix is not damaged in the process, the viscosity and the organic content of the sample are only reduced, and the uniformity and the stability of the system are kept. Furthermore, the determination method adopts a standard addition method to determine the content of the metal elements, and has the advantages of maturity, reliability and simple operation. Furthermore, the result of the standard recovery rate of the invention is in the range of 80-120%, which meets the requirement, and in addition, the correlation r value of the standard curve equation of the determination method exceeds 0.999, and the test accuracy is high. The invention has the advantages of simple steps, high efficiency and accuracy, and is suitable for real-time monitoring.
Detailed Description
The technical scheme of the invention is further described in detail by the specific implementation mode, and the experimental method without specific conditions noted in the following examples is implemented according to the existing method and conditions in the industry.
Example 1
1 Main instruments and working parameters
Atomic absorption spectrometer (AAS, jena 700P), the instrument operating parameters are shown in table 1.
TABLE 1 atomic absorption spectrometer operating parameters
2 reagent and Standard solution
Unless otherwise stated, only reagent of superior purity and pure water of secondary and above in accordance with GB/T6682 were used in the analysis.
2.1 emulsifier Span 40.
2.2 iron standard solution, national standard solution.
2.3 calcium standard solution, national standard solution.
2.4 chromium standard solution, national standard solution.
3 analytical step
3.1 dissolving the emulsifier Span 40 and water according to the mass ratio of 1:19 to prepare an emulsifier solution.
3.2 preparing a sample of cumene and an emulsifier solution into a mixed sample according to the mass ratio of 1: 49.
3.3, respectively diluting the standard solutions of the iron, calcium and chromium metal elements with water, respectively adding different amounts of the standard solutions into the 3.1 emulsifier solution and the 3.2 mixed sample, so that the contents of the mixed metal standard substances in the water are respectively 20 mug/L, 40 mug/L, 80 mug/L, 100 mug/L, 200 mug/L and 500 mug/L; the content of the mixed metal standard substance in the 3.2 mixed sample was 0.1mg/L, 0.5mg/L, 1mg/L, 2mg/L, 5mg/L, and 10mg/L, respectively.
3.4 adding each metal element standard substance into the emulsifier solution to be used as a sample of the standard recovery rate.
And 3.5, adding the solutions prepared in the steps 3.1, 3.2 and 3.3 into AAS to respectively determine the absorbance of the elements, drawing a standard curve of the sample and the emulsifier solution by taking the absorbance as a horizontal coordinate and taking the concentration of the standard substance as a vertical coordinate, wherein the r values of standard curve equations corresponding to the metal elements of iron, calcium and chromium are respectively 0.9995, 0.9999 and 0.9998. And calculating the contents of iron, calcium and chromium metal elements in the emulsifier solution and the sample according to an equation.
4 results of analysis
The contents of the metal elements in the soybean oil sample are shown in table 2:
TABLE 2 content of respective metal elements in blank, sample and spiked sample
As can be seen from the table above, when the cumene sample is subjected to AAS test after emulsification treatment by the emulsifier Span 40, the standard recovery rate range of each metal element is 95.8-99.1%, and the recovery rate accuracy is high.
Example 2
1 Main instruments and working parameters
Inductively coupled plasma emission spectrometer (ICP OES, agilent 5100).
2 reagent and Standard solution
Unless otherwise stated, only reagent of superior purity and pure water of secondary and above in accordance with GB/T6682 were used in the analysis.
2.1 emulsifier Triton X-100.
2.2 potassium standard solution, national standard solution.
2.3 magnesium standard solution, national standard solution.
2.4 sodium standard solution, national standard solution.
3 analytical step
3.1 dissolving an emulsifier Triton X-100 and water according to a ratio of 1:19 to prepare an emulsifier solution.
3.2 taking a soybean oil sample and preparing a mixed sample by an emulsifier solution according to a ratio of 1: 9.
3.3 diluting the potassium, magnesium and sodium metal element standard solutions to 100mg/ml with water respectively, adding different amounts of the standard solutions to the 3.1 emulsifier solution and the 3.2 mixed sample respectively, so that the contents of the mixed metal standard substance in the 3.1 emulsifier solution are respectively 50 mug/L, 80 mug/L, 100 mug/L, 200 mug/L, 500 mug/L and 800 mug/L. The content of the mixed metal standard substance in the 3.2 mixed sample was 0.1mg/L, 0.5mg/L, 1mg/L, 2mg/L, 5mg/L, and 10mg/L, respectively.
3.4 adding each element standard substance into the emulsified solution to be used as a sample for adding the standard recovery rate.
3.5 the solutions prepared in 3.1, 3.2 and 3.3 are put into ICP OES to respectively determine the absorbance of the elements, the absorbance is taken as the abscissa and the concentration of the standard substance is taken as the ordinate to draw the standard curve of the sample and the emulsifier solution, the r values of the standard curve equations corresponding to the potassium, magnesium and sodium metal elements are respectively 0.9999, 0.9993 and 0.9997, and the result of the content of the metal elements in the sample is calculated according to the equation.
4 results of analysis
The contents of the metal elements in the samples are respectively shown in the table 3:
TABLE 3 content of respective metal elements in blank, sample and spiked sample
As can be seen from the above table, the sample test of the soybean oil sample after the emulsifying treatment of the emulsifier Triton X-100 shows that the range of the standard recovery rate is 90.0-92.0%, and the recovery rate accuracy is high.
Example 3
1 Main instruments and working parameters
Inductively coupled plasma mass spectrometer (ICP MS, agilent 7900).
2 reagent and Standard solution
Unless otherwise stated, only reagent of superior purity and pure water of secondary and above in accordance with GB/T6682 were used in the analysis.
2.1 emulsifier TWEEN 80.
2.2 copper standard solution, national standard solution.
2.3 lead standard solution, national standard solution.
2.4 zinc standard solution, national standard solution.
3 analytical step
3.1 dissolving an emulsifier TWEEN 80 and water according to the mass ratio of 1:5 to prepare an emulsifier solution.
3.2 taking the octyl stearate sample and the emulsifier solution to prepare a mixed sample according to the mass ratio of 1: 49.
3.3, respectively diluting the standard solutions of the copper, lead and zinc metal elements to 100mg/ml by using water, respectively adding different amounts of the standard solutions into the 3.1 emulsifier solution and the 3.2 mixed sample, so that the contents of the mixed metal standard substances in the 3.1 emulsifier solution are respectively 10 mug/L, 50 mug/L, 80 mug/L, 100 mug/L, 200 mug/L and 300 mug/L. The contents of the mixed metal standard substance in the 3.2 mixed sample were 10. mu.g/L, 50. mu.g/L, 80. mu.g/L, 100. mu.g/L, 200. mu.g/L, and 300. mu.g/L, respectively.
3.4 adding each element standard substance into the emulsifier solution to be used as a sample of the standard recovery rate.
3.5 the solutions prepared in 3.1, 3.2 and 3.3 are respectively processed by ICP MS to determine the signal intensity of the elements, the signal intensity is used as the abscissa and the concentration of the standard substance is used as the ordinate to draw the standard curve of the sample and the emulsifier solution, and the content of the metal elements in the sample is calculated according to the equation.
4 results of analysis
The contents of the metal elements in the samples are respectively shown in the table 3:
TABLE 3 content of respective metal elements in blank, sample and spiked sample
As can be seen from the above table, the sample injection test of the octyl stearate sample after the emulsifying treatment of the emulsifier TWEEN 80 shows that the range of the standard recovery rate is 88.0-96.0%, and the accuracy of the recovery rate is high.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (9)
1. A method for measuring metal elements in an organic matter is characterized by comprising the steps of emulsifying the organic matter by using an emulsifying agent, and measuring the content of the metal elements in the organic matter by adopting a standard addition method, wherein the organic matter is liquid at normal temperature.
2. The method according to claim 1, wherein the emulsifier is a non-foaming emulsifier or a low-foaming emulsifier.
3. The method according to claim 2, wherein the emulsifier is at least one selected from Tween series, Triton X-100, OP-10, Span series, Atlas G series, Solulan series, Emcol series, Atmul series, Glucate series, Glaurin series, and Arlacel series.
4. The method for measuring metallic elements in organic materials according to any one of claims 1 to 3, wherein an emulsifier solution is prepared with water before the emulsification of the organic materials, and the emulsifier accounts for 0.1 to 20wt% of the emulsifier solution.
5. The method for measuring metallic elements in organic substances according to any one of claims 1 to 3, wherein the organic substance accounts for 0.1 to 20wt% of a homogeneous solution obtained by mixing the organic substance with the emulsifier solution.
6. The method according to claim 5, wherein the sample is emulsified into the homogeneous solution by means of oscillation, stirring or ultrasound after the organic substance is mixed with the emulsifier solution, and the homogeneous solution is free from delamination within 1 hour.
7. The method for determining the metal elements in the organic matters according to any one of claims 1 to 3, wherein a test instrument adopted in the method is an atomic absorption spectrometer, an inductively coupled plasma emission spectrometer or an inductively coupled plasma mass spectrometer.
8. The method for measuring a metal element in an organic material according to any one of claims 1 to 3, wherein the metal element measured by the measuring method is potassium, sodium, calcium, magnesium, zinc, iron, copper, chromium, lead, aluminum, cadmium, nickel, barium or lithium.
9. The method for measuring metallic elements in organic substances according to any one of claims 1 to 3, wherein the organic substance is at least one of a hydrocarbon and a hydrocarbon derivative.
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