CN114076793B - Method for measuring iodine content in food based on inductively coupled plasma mass spectrometry - Google Patents
Method for measuring iodine content in food based on inductively coupled plasma mass spectrometry Download PDFInfo
- Publication number
- CN114076793B CN114076793B CN202010814431.7A CN202010814431A CN114076793B CN 114076793 B CN114076793 B CN 114076793B CN 202010814431 A CN202010814431 A CN 202010814431A CN 114076793 B CN114076793 B CN 114076793B
- Authority
- CN
- China
- Prior art keywords
- solution
- iodine
- sample
- mug
- food
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
- G01N2001/4088—Concentrating samples by other techniques involving separation of suspended solids filtration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention provides a method for measuring iodine content in food based on inductively coupled plasma mass spectrometry, which comprises the following steps: preparing a sample solution and a sample blank solution, preparing an iodine series standard solution and an internal standard use solution, measuring the iodine concentration by an inductively coupled plasma mass spectrometer, and calculating the iodine content in the food. The determination method has the characteristics of high sensitivity, high precision and high anti-interference performance, and the sample pretreatment method is simple, so that the practicability and operability of the method are enhanced. The determination method provided by the invention is simple to operate and easy to implement, and has a wide market application prospect.
Description
Technical Field
The invention relates to the field of determination of iodine content in food inspection and detection, in particular to a method for determining iodine content in various foods based on an inductively coupled plasma mass spectrometry.
Background
Iodine is a trace element necessary for human body, and the potential hazard caused by insufficient or excessive intake of iodine for a long time is increasingly paid attention to health, and iodine is a volatile element which is extremely easy to oxidize and reduce and has low content in most foods. Algae food is a popular food due to the advantages of health, low fat, iodine content and the like, however, the iodine determination method in the food is less, and the algae food mainly comprises a redox titration method, an arsenic cerium catalytic spectrophotometry method, a gas chromatography method and the like. Wherein: (1) redox titration: the method belongs to a method for measuring high-content iodine, and is suitable for measuring iodine in algae foods such as kelp, laver, undaria pinnatifida and the like. (2) arsenic cerium catalytic spectrophotometry: the method is suitable for measuring low-iodine content, is suitable for measuring iodine in foods such as grains, vegetables and the like, and is unsuitable for measuring samples with higher iodine content, such as seaweed samples such as kelp, laver, undaria pinnatifida and the like due to larger dilution ratio in the test. In addition, the method needs to use high-toxicity arsenic trioxide, so that the reagent is difficult to purchase in a laboratory, and the use of the method is seriously affected. (3) gas chromatography: the method is mainly used for measuring dairy products of infant formulas and dairy products, but partial iodine in partial special medical formulas and special medical formulas exists in a combined state, and gas chromatography can only be used for measuring free iodine, so that the measurement result by adopting the gas chromatography is low,
although the above methods for measuring the iodine content in food can measure the iodine content in food to a certain extent, the detected food sample matrix has a certain limit, cannot be used for measuring various foods, and most of the methods have defects in the efficiency and accuracy of the iodine content measurement. Therefore, the existing technology for detecting iodine in food is still to be developed and supplemented.
Disclosure of Invention
In order to solve the above problems, a method for determining iodine content in various foods based on inductively coupled plasma mass spectrometry is provided, which comprises the following steps:
s1, placing the extracting solution and food with preset quality into a centrifuge tube, shaking uniformly, adding water into the shaking liquid, and diluting the volume of the shaking liquid to a set multiple; centrifuging the diluted shaking liquid, extracting supernatant and filtering to obtain a sample solution; wherein the extracting solution is a tetramethyl ammonium hydroxide aqueous solution with the mass fraction of 5%.
S2, placing the extracting solution in a centrifuge tube, shaking uniformly, adding water into the shaking-up solution, and diluting the volume of the shaking-up solution by a set multiple to obtain the diluted volume of the shaking-up solution; centrifuging the diluted shaking liquid, extracting supernatant and filtering to obtain a sample blank liquid without food; wherein the extracting solution is a tetramethyl ammonium hydroxide aqueous solution with the mass fraction of 5%.
S3, preparing iodine series standard solution; respectively sucking proper volumes of iodine standard use solutions, and preparing serial standard solutions with concentrations of 0 mug/L, 0.100 mug/L, 1.00 mug/L, 5.00 mug/L, 10.0 mug/L, 15.0 mug/L and 20.0 mug/L by using diluent; the iodine standard use solution is potassium iodide or potassium iodate solution with the concentration of 10 mug/L, and the diluent is tetramethyl ammonium hydroxide aqueous solution with the mass fraction of 0.5%.
S4, preparing an internal standard use solution: any single element or multi-element standard stock solution of tellurium, indium, rhodium and rhenium is adopted as an internal standard, and diluted into an internal standard use solution by a diluent; the concentration of the internal standard use solution is 10-100 mug/L; the diluent is tetramethyl ammonium hydroxide aqueous solution with the mass fraction of 0.5%.
S5, iodine mass concentration: and respectively injecting the sample blank liquid and the sample solution into an inductively coupled plasma mass spectrometer, and calculating the mass concentration of iodine in the sample blank liquid and the sample solution according to the drawn standard curve.
S6, according to the formula
Calculating the iodine content in the food; wherein X is the iodine content in the sample, and the unit is mg/kg; c is the concentration of iodine in the liquid to be detected, and the unit is [ mu ] g/L;
c 0 the concentration of iodine in the blank liquid is in [ mu ] g/L; v is the volume of constant volume, and the unit is mL; f is dilution multiple; m is the weight of the sample and the unit is g.
In the method for determining the iodine content in the food, the standard curve in the step S5 is drawn as follows: injecting iodine series standard solution and internal standard use solution into an inductively coupled plasma mass spectrometer to determine signal response values of iodine and internal standard elements; and drawing a standard curve by taking the concentration of iodine as an abscissa and the ratio of iodine to the response signal value of the selected internal standard element as an ordinate.
In the method for determining the iodine content in the food, the cleaning time of the sample injection system of the inductively coupled plasma mass spectrometer is more than 60 seconds.
In the method for determining the iodine content in the food, the preset mass of the food is 0.2-1.0 g.
In the method for determining the iodine content in the food, the volume dilution set multiple of the shaking-up liquid is 10 times.
In the method for determining the iodine content in the food, the centrifugal speed of the centrifugal tube is greater than 3000 rpm, and the centrifugal time is 10 minutes.
In the method for measuring iodine content in food, the supernatant is filtered by a water phase filter membrane of 0.45 μm to obtain the sample solution.
In the method for determining iodine content in a food product, the operating conditions of the inductively coupled plasma mass spectrometer include: the radio frequency power is 1550 watts; the plasma gas flow rate is 15 liters/min; the flow rate of the carrier gas is 0.80 to 0.90 liters/min; the flow rate of the auxiliary gas is 0.30 to 0.40 liters/min; pump speed at analysis 0.10 rpm; the sampling depth is 8-10 mm; the atomizer is a high salt/concentric atomizer; the temperature of the semiconductor refrigeration fog chamber is controlled to be 2.0 ℃; the flow rate of the collision cell gas helium is 4 ml/min-5 ml/min.
The beneficial effects are that: the method for measuring the iodine content in the food based on the inductively coupled plasma mass spectrometry comprises the steps of preparing a sample solution and a sample blank solution, preparing an iodine series standard solution and an internal standard use solution, measuring the iodine concentration by using an inductively coupled plasma mass spectrometer, and calculating the iodine content in the food. The determination method has the characteristics of high sensitivity, high precision and high anti-interference performance, has wide application range, can be used for determining iodine in various foods, has a simple sample pretreatment method, and enhances the practicability and operability of the method. The determination method provided by the invention is simple to operate and easy to implement, and has a wide market application prospect.
Detailed Description
The invention provides a method for measuring the iodine content in food based on an inductively coupled plasma mass spectrometry, which comprises the steps of S1-S6, specifically preparing a sample solution and a sample blank solution, preparing an iodine series standard solution and an internal standard use solution, measuring the iodine concentration and calculating the iodine content in the food.
The principle adopted by the invention is as follows: iodine in the sample solution is extracted by a tetramethyl ammonium hydroxide solution, and is determined by an inductively coupled plasma mass spectrometer, the quality is characterized by a specific mass number 127 (mass-to-charge ratio, m/z) of iodine, and the quantitative determination is carried out by the ratio of the intensities of the mass spectrum signals of iodine and internal standard elements in proportion to the concentration of iodine, so that the content of iodine in the sample is rapidly determined. The determination method has the characteristics of high sensitivity, high precision and high anti-interference performance, has strong applicability, can be used for determining iodine in various foods, has a simple sample pretreatment method, and enhances the practicability and operability of the method.
In the step S1, placing the extracting solution and food with preset mass in a centrifuge tube, shaking uniformly, adding water into the shaking-up solution, and diluting the volume of the shaking-up solution to a set multiple; centrifuging the diluted shaking liquid, extracting supernatant, and filtering to obtain sample solution. The extracting solution is a tetramethyl ammonium hydroxide aqueous solution with the mass fraction of 5%, and the preset mass of the food is 0.2-1.0 g. The supernatant was filtered through a 0.45 μm aqueous filtration membrane to prepare the sample solution.
In the embodiment, the food and the extracting solution are mixed, shaken uniformly and diluted and centrifuged, and the supernatant is filtered to be favorable for fully extracting the iodine in the food, and solid impurities are prevented from being contained in the extracted sample solution, so that the adverse effect of insoluble impurities on the determination of the iodine content in the food is avoided, meanwhile, the solid impurities are prevented from blocking the pipeline of the inductively coupled plasma mass spectrometer, the inductively coupled plasma mass spectrometer is protected, and the smooth detection of a large number of samples is ensured.
In a preferred embodiment, the diluted shaking liquid is placed in an oven or a water bath shaking table at 85+/-5 ℃ to extract 3h, and then the shaking liquid is centrifuged. The higher the temperature, the higher the extraction efficiency of iodine in the food, and the extraction time of 2-3 hours is better than the extraction efficiency of 1 hour. However, the extraction time is prolonged, and the extraction efficiency is not obviously improved, so that the extraction time of 3 hours is adopted.
In step S2, a sample blank solution is prepared by the same method as in step S1. The method comprises the following steps: placing the extracting solution in a centrifuge tube, shaking uniformly, adding water into the shaking-up solution, and diluting the volume of the shaking-up solution by a set multiple to obtain the diluted volume of the shaking-up solution; centrifuging the diluted shaking liquid, extracting supernatant, and filtering to obtain sample blank liquid without food. In steps S1 and S2, the volume dilution set multiple of the shaking-up liquid of both is 10 times. The centrifugal speed of the centrifugal tube is greater than 3000 rpm, and the centrifugal time is 10 minutes.
Step S3, preparing iodine series standard solution; respectively sucking proper volumes of iodine standard use solutions, and preparing serial standard solutions with concentrations of 0 mug/L, 0.100 mug/L, 1.00 mug/L, 5.00 mug/L, 10.0 mug/L, 15.0 mug/L and 20.0 mug/L by using diluent; the iodine standard use solution is potassium iodide or potassium iodate solution with the concentration of 10 mug/L, and the diluent is tetramethyl ammonium hydroxide aqueous solution with the mass fraction of 0.5%.
Step S4 is to prepare an internal standard use solution: any single element or multi-element standard stock solution of tellurium, indium, rhodium and rhenium is adopted as an internal standard, and diluted into an internal standard use solution by a diluent; the concentration of the internal standard use solution is 10-100 mug/L; the diluent is tetramethyl ammonium hydroxide aqueous solution with the mass fraction of 0.5%. In addition, for a sample with a complex matrix, 1% -2% of isopropanol (the volume percentage concentration after mixing with the sample) can be added into the internal standard.
Wherein the standard stock solution (1000 mg/L) is prepared by the steps of: weighing potassium iodate 0.1685 g which is dried to constant weight at 180+/-2 ℃, dissolving the potassium iodate in water and fixing the volume to 100 mL; or weighing potassium iodide 0.1307 g dried by a silica gel dryer to 24 h, dissolving with water, diluting to 100 mL, and storing in brown bottle; iodine standard solutions that are country-certified and granted standard certificates may also be used.
Step S5 is to measure the mass concentration of iodine: and respectively injecting the sample blank liquid and the sample solution into an inductively coupled plasma mass spectrometer, and calculating the mass concentration of iodine in the sample blank liquid and the sample solution according to the drawn standard curve. Wherein the standard curve is drawn as follows: injecting iodine series standard solution and internal standard use solution into an inductively coupled plasma mass spectrometer to determine signal response values of iodine and internal standard elements; and drawing a standard curve by taking the concentration of iodine as an abscissa and the ratio of iodine to the response signal value of the selected internal standard element as an ordinate.
Further, the cleaning time of the sample injection system of the inductively coupled plasma mass spectrometer is more than 60 seconds. According to the invention, the sample injection cleaning time of the inductively coupled plasma mass spectrometer is prolonged, so that residual iodine in a sample injection system can be cleaned more fully, because the memory effect of the iodine is very strong, the conversion of iodate in an acidic medium can cause a remarkable memory effect through glass absorption, namely, the occurrence of chemical formulas 5I-I+IO 3- +6H+ ⇌ I2+3H2O, the reagent purity and the memory effect are main reasons of high background, and the detection limit of the method can be increased. Therefore, during the experiment, the sample injection system is fully cleaned by the extracting solution, and the cleaning time is more than 60 seconds.
In particular, the operating conditions of the inductively coupled plasma mass spectrometer include: the radio frequency power is 1550 watts; the plasma gas flow rate is 15 liters/min; the flow rate of the carrier gas is 0.80 to 0.90 liters/min; the flow rate of the auxiliary gas is 0.30 to 0.40 liters/min; pump speed at analysis 0.10 rpm; the sampling depth is 8-10 mm; the atomizer is a high salt/concentric atomizer; the temperature of the semiconductor refrigeration fog chamber is controlled to be 2.0 ℃; the flow rate of the collision cell gas helium is 4 ml/min-5 ml/min.
In step S6, according to the formula
Calculating the iodine content in the food; wherein X is the iodine content in the sample, and the unit is mg/kg; c is the concentration of iodine in the liquid to be detected, and the unit is [ mu ] g/L; c 0 The concentration of iodine in the blank liquid is in [ mu ] g/L; v is the volume of constant volume, and the unit is mL; f is dilution multiple; m is the weight of the sample and the unit is g. In the present invention, the detection limit of the method described in the examples of the present invention was 10. Mu.g/kg and the quantitative limit was 30. Mu.g/kg, calculated from the sampling amount of 0.5. 0.5 g to a constant volume of 50 mL. In the calculation formula of the invention, after the concentration of the diluted solution is multiplied by the dilution multiple, the concentration of the blank liquid of the sample is subtracted to calculate the iodine content, so that the calculation is more accurate (because the dilution is to only dilute the sample solution).
The accuracy and precision of the assay method of the present invention is explored by specific experiments.
Specific examples:
method precision and accuracy experiment:
the method is characterized in that imported and domestic standard reference substances of different food matrixes are adopted for carrying out methodological research, in a He mode, internal standard corrections of different internal standards or different mass numbers are adopted, the relative standard deviation of 7 independent determinations is less than 10%, the determination results are all within the uncertainty range of the standard reference values, the detailed results are shown in a table 1, wherein special experiments are carried out for the iodine in the seasoning salt, and the method is suitable for the determination of the iodine salt from the results of the tables 1-2.
Table 1-1 accuracy experiment n=7 units: mg/kg
Table 1-2 accuracy experiment-test of flavoring salt n=7 units: mg/kg
Claims (8)
1. A method for determining iodine content in food based on inductively coupled plasma mass spectrometry, comprising the steps of:
s1, placing the extracting solution and food with preset quality into a centrifuge tube, shaking uniformly, adding water into the shaking liquid, and diluting the volume of the shaking liquid to a set multiple; centrifuging the diluted shaking liquid, extracting supernatant and filtering to obtain a sample solution; wherein the extracting solution is a tetramethyl ammonium hydroxide aqueous solution with the mass fraction of 5%;
s2, placing the extracting solution in a centrifuge tube, shaking uniformly, adding water into the shaking-up solution, and diluting the volume of the shaking-up solution by a set multiple to obtain the diluted volume of the shaking-up solution; centrifuging the diluted shaking liquid, extracting supernatant and filtering to obtain a sample blank liquid without food;
s3, preparing iodine series standard solution; respectively sucking proper volumes of iodine standard use solutions, and preparing serial standard solutions with concentrations of 0 mug/L, 0.100 mug/L, 1.00 mug/L, 5.00 mug/L, 10.0 mug/L, 15.0 mug/L and 20.0 mug/L by using diluent; wherein the iodine standard use solution is a potassium iodide or potassium iodate solution with the concentration of 100 mug/L, and the diluent is a tetramethyl ammonium hydroxide aqueous solution with the mass fraction of 0.5%;
s4, preparing an internal standard use solution: any single element or multi-element standard stock solution of tellurium, indium, rhodium and rhenium is adopted as an internal standard, and diluted into an internal standard use solution by a diluent; the concentration of the internal standard use solution is 10-100 mug/L; the diluent is tetramethyl ammonium hydroxide aqueous solution with the mass fraction of 0.5%;
s5, iodine mass concentration: respectively injecting the sample blank liquid and the sample solution into an inductively coupled plasma mass spectrometer, and calculating the mass concentration of iodine in the sample blank liquid and the sample solution according to a drawn standard curve;
s6, according to the formula
Calculating the iodine content in the food; wherein X is the iodine content in the sample, and the unit is mg/kg; c is the concentration of iodine in the liquid to be detected, and the unit is mug/L;
c 0 the concentration of iodine in the blank liquid is expressed in mug/L; v is the volume of constant volume, and the unit is mL; f is dilution multiple; m is the weight of the sample and the unit is g.
2. The method for determining the iodine content of a food product according to claim 1, wherein the plotting of the standard curve in step S5 is: injecting iodine series standard solution and internal standard use solution into an inductively coupled plasma mass spectrometer to determine signal response values of iodine and internal standard elements; and drawing a standard curve by taking the concentration of iodine as an abscissa and the ratio of iodine to the response signal value of the selected internal standard element as an ordinate.
3. The method for determining the iodine content of a food product according to claim 1, wherein, in step S5,
the sample injection system cleaning time of the inductively coupled plasma mass spectrometer is more than 60 seconds.
4. The method for determining the iodine content of a food product according to claim 1, wherein in step S1 the predetermined mass of the food product is 0.2 to 1.0g.
5. The method for measuring iodine content in food according to claim 1, wherein in the steps S1 and S2, the volume dilution of the shaking-up solution is set to 10 times.
6. The method of determining the iodine content of a food product of claim 1, wherein in both steps S1 and S2 the centrifuge tube is centrifuged at greater than 3000 rpm for a period of 10 minutes.
7. The method for measuring iodine content in food according to claim 1, wherein in step S1, the supernatant is filtered with a 0.45 μm aqueous filtration membrane to prepare the sample solution.
8. The method of determining the iodine content of a food product of claim 1, wherein in steps S1 and S2, the operating conditions of the inductively coupled plasma mass spectrometer include: the radio frequency power is 1550 watts; the plasma gas flow rate is 15 liters/min; the flow rate of the carrier gas is 0.80 to 0.90 liters/min; the flow rate of the auxiliary gas is 0.30 to 0.40 liters/min; pump speed at analysis 0.10 rpm; the sampling depth is 8-10 mm; the atomizer is a high salt/concentric atomizer; the temperature of the semiconductor refrigeration fog chamber is controlled to be 2.0 ℃; the flow rate of the collision cell gas helium is 4 ml/min-5 ml/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010814431.7A CN114076793B (en) | 2020-08-13 | 2020-08-13 | Method for measuring iodine content in food based on inductively coupled plasma mass spectrometry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010814431.7A CN114076793B (en) | 2020-08-13 | 2020-08-13 | Method for measuring iodine content in food based on inductively coupled plasma mass spectrometry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114076793A CN114076793A (en) | 2022-02-22 |
| CN114076793B true CN114076793B (en) | 2023-06-09 |
Family
ID=80281237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010814431.7A Active CN114076793B (en) | 2020-08-13 | 2020-08-13 | Method for measuring iodine content in food based on inductively coupled plasma mass spectrometry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114076793B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016017836A (en) * | 2014-07-08 | 2016-02-01 | 住友金属鉱山株式会社 | Metal element concentration analysis method using inductive coupling plasma emission spectrophotometer |
| CN106093177A (en) * | 2016-08-12 | 2016-11-09 | 绍兴出入境检验检疫局综合技术服务中心 | A kind of method utilizing inductively coupled plasma mass spectrometry to measure fabric Ge content |
| CN106596704A (en) * | 2017-02-27 | 2017-04-26 | 山东省食品药品检验研究院 | Method for measuring content of selenium in vegetables through collision cell-inductively coupled plasma source mass spectrometer |
| CN107525799A (en) * | 2017-08-25 | 2017-12-29 | 广西德邦科技有限公司 | The method of chromium content in inductively coupled plasma mass spectrometry measure indium |
| CN110174458A (en) * | 2019-07-04 | 2019-08-27 | 一品一码检测（福建）有限公司 | The detection method that lead and total arsenic measure simultaneously in a kind of formulated food additive |
| CN110320264A (en) * | 2019-08-09 | 2019-10-11 | 福建省农业科学院农业质量标准与检测技术研究所 | Inductively coupled plasma mass spectrometry measure marine sediment in lead, cadmium, chromium, copper, zinc, nickel content detection method |
-
2020
- 2020-08-13 CN CN202010814431.7A patent/CN114076793B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016017836A (en) * | 2014-07-08 | 2016-02-01 | 住友金属鉱山株式会社 | Metal element concentration analysis method using inductive coupling plasma emission spectrophotometer |
| CN106093177A (en) * | 2016-08-12 | 2016-11-09 | 绍兴出入境检验检疫局综合技术服务中心 | A kind of method utilizing inductively coupled plasma mass spectrometry to measure fabric Ge content |
| CN106596704A (en) * | 2017-02-27 | 2017-04-26 | 山东省食品药品检验研究院 | Method for measuring content of selenium in vegetables through collision cell-inductively coupled plasma source mass spectrometer |
| CN107525799A (en) * | 2017-08-25 | 2017-12-29 | 广西德邦科技有限公司 | The method of chromium content in inductively coupled plasma mass spectrometry measure indium |
| CN110174458A (en) * | 2019-07-04 | 2019-08-27 | 一品一码检测（福建）有限公司 | The detection method that lead and total arsenic measure simultaneously in a kind of formulated food additive |
| CN110320264A (en) * | 2019-08-09 | 2019-10-11 | 福建省农业科学院农业质量标准与检测技术研究所 | Inductively coupled plasma mass spectrometry measure marine sediment in lead, cadmium, chromium, copper, zinc, nickel content detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114076793A (en) | 2022-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101556231A (en) | Ocean air salinity measuring method | |
| CN107677757A (en) | The method for determining vanillic aldehyde in food, methyl vanillin, Ethyl vanillin simultaneously | |
| CN103267821A (en) | HPLC-ELSD (high performance liquid chromatography-evaporation light-scattering detection) measuring method of grape berry sugar | |
| CN114137140A (en) | Method for synchronously detecting food additives and heavy metal content in food by reverse phase HPLC-ICP-MS method | |
| CN113310915A (en) | Method for measuring content of residual linear alkyl benzene sodium sulfonate in beer | |
| CN101566575B (en) | Method for detecting protein content in 2-keto-L-gulonic acid | |
| Ulusoy et al. | A new approach to the determination of folic acid at trace levels: using a Fe (III)-folic acid complex to amplify analytical signal | |
| CN102305833B (en) | Measurement method of content of nitrites in polypropylene tow for cigarettes | |
| Sochorova et al. | Electrochemical and others techniques for the determination of malic acid and tartaric acid in must and wine | |
| CN103728263B (en) | A kind of cassia seeds polysaccharides quantitative detecting method | |
| Smit et al. | Determination of tannins and related polyphenols in foods | |
| CN114076793B (en) | Method for measuring iodine content in food based on inductively coupled plasma mass spectrometry | |
| CN103091418B (en) | Method for detecting plasticizing agent | |
| CN106353309A (en) | Method for detecting content of yeast: beta-glucosan, in modified milk | |
| CN113960211A (en) | Method for measuring vitamin K in serum | |
| CN107095122B (en) | Method for eliminating formaldehyde in Peru squid | |
| CN103257200A (en) | Method of determining content of sodium cyclamate in food through high performance liquid chromatography with ultraviolet detector | |
| CN102507757A (en) | Method for measuring ascorbic acid content in porphyra yezoensis by high performance liquid chromatography | |
| CN111721864A (en) | Method for rapidly determining non-edible substance trithiocyanuric acid trisodium salt in wheat flour and additives thereof by high performance liquid chromatography | |
| CN108426965B (en) | Method for detecting isomaltose, isomaltotriose, maltose and panose in yellow wine | |
| Dias et al. | Ultrasound-assisted emulsification of solidified floating organic drop microextracted for pre-concentration of cadmium in food and water samples | |
| Zhang et al. | Estimation of Cr (III) in water with the presence of Cr (VI) by chlorophosphonazo I color reaction spectrophotometry | |
| Birgani et al. | Development of a Dispersive Liquid–Liquid Microextraction Method Combined with UV-Visible Spectrophotometry for Determination of Trace Aluminum (III) in Water, Wastewater, Food, Biological, and Pharmaceutical Samples | |
| Chebotarev et al. | Extraction-Spectrophotometric Determination of Cu (II) with 6, 7-Dihydroxy-4-Methyl-2-Phenylbenzopyrylium Chloride in Waters of Various Categories | |
| CN108693274B (en) | Method for detecting triazole pesticide residues in white wine by combining solidification-floating dispersion liquid microextraction and HPLC |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |