CN114076793A - Method for determining iodine content in food based on inductively coupled plasma mass spectrometry - Google Patents
Method for determining iodine content in food based on inductively coupled plasma mass spectrometry Download PDFInfo
- Publication number
- CN114076793A CN114076793A CN202010814431.7A CN202010814431A CN114076793A CN 114076793 A CN114076793 A CN 114076793A CN 202010814431 A CN202010814431 A CN 202010814431A CN 114076793 A CN114076793 A CN 114076793A
- Authority
- CN
- China
- Prior art keywords
- solution
- iodine
- food
- sample
- mug
- 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.)
- Granted
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 determining iodine content in food based on inductively coupled plasma mass spectrometry, which comprises the following steps: preparing sample solution and sample blank liquid, preparing iodine series standard solution and internal standard using liquid, measuring iodine concentration by an inductively coupled plasma mass spectrometer, and calculating the iodine content in 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 realize, 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 necessary trace element for human body, and the potential harm to health caused by insufficient or excessive iodine intake for a long time is increasingly paid attention to, and iodine is a volatile element, is easy to be oxidized and reduced, and has low content in most foods. Algae food is gradually becoming popular food due to its advantages of health, low fat, and containing iodine, however, the method for measuring iodine in food is few, and mainly includes redox titration method, arsenic-cerium catalytic spectrophotometry, gas chromatography, and the like. Wherein: (1) redox titration method: 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-content iodine, is suitable for measuring iodine in foods such as grains, vegetables and the like, and is not suitable for measuring samples with high iodine content, such as seaweed, laver, undaria pinnatifida and other algae samples, because the dilution ratio is high during the measurement, larger errors are brought, and the method is not suitable for measuring. In addition, the method needs arsenic trioxide with high toxicity, and the reagent is difficult to be purchased in a common laboratory, thereby seriously influencing the use of the method. (3) Gas chromatography: the method is mainly used for determining the dairy products of infant formula food and dairy products, but part of iodine in the formula food with special medical application and the infant formula food with special medical application exists in a combined state, and the gas chromatography can only be used for determining free iodine, so the determination result by adopting the gas chromatography is lower,
although the above existing methods for measuring iodine content can measure the iodine content in food to a certain extent, the detected food sample matrix has certain limitations, and cannot be used for measuring various foods, and most of the existing methods have defects in the efficiency and accuracy of measuring the iodine content. Therefore, the iodine detection technology in the existing food needs to be developed and supplemented.
Disclosure of Invention
In order to solve the problems, the method for determining the iodine content in various foods based on the inductively coupled plasma mass spectrometry is provided, and comprises the following steps:
s1, placing the extracting solution and food with preset mass in a centrifuge tube, shaking up, adding water into the shaking-up solution, and diluting the volume of the shaking-up solution to a set multiple; centrifuging the diluted shaking solution, extracting supernatant and filtering to prepare a sample solution; wherein the extracting solution is a tetramethylammonium hydroxide aqueous solution with the mass fraction of 5%.
S2, placing the extracting solution into a centrifugal tube, shaking up, 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 solution, extracting supernatant, and filtering to obtain a sample blank solution without food; wherein the extracting solution is a tetramethylammonium hydroxide aqueous solution with the mass fraction of 5%.
S3, preparing iodine series standard solution; respectively sucking a proper volume of iodine standard use solution, and preparing a series of standard solutions with the 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 the diluent; wherein the iodine standard use solution is potassium iodide or potassium iodate solution with the concentration of 10 mug/L, and the diluent is tetramethylammonium hydroxide aqueous solution with the mass fraction of 0.5%.
S4, preparing an internal standard use solution: taking any one single-element or multi-element standard stock solution of tellurium, indium, rhodium and rhenium as an internal standard, and diluting the internal standard stock solution into internal standard use solution by using diluent; the concentration of the internal standard use solution is 10-100 mug/L; the diluent is a tetramethylammonium 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 iodine mass concentration 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 solution to be detected, and the unit is mug/L;
c0the concentration of iodine in the blank liquid is expressed in microgram/L; v is the constant volume, and the unit is mL; f is the dilution multiple; and m is the weighed mass 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, and measuring signal response values of iodine and internal standard elements; and drawing a standard curve by taking the concentration of the iodine as an abscissa and the ratio of the 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 a sample injection system of the inductively coupled plasma mass spectrometer is more than 60 seconds.
In the method for measuring the iodine content in the food, the preset mass of the food is 0.2-1.0 g.
In the method for measuring the iodine content in the food, the volume dilution set times of the shaking liquid are all 10 times.
In the method for measuring the iodine content in the food, the centrifugal rotating speed of the centrifugal tubes is more than 3000 r/min, and the centrifugal time is 10 min.
In the method for measuring the iodine content in the food, the sample solution is prepared after the supernatant is filtered by a 0.45-micron water phase filter membrane.
In the method for determining iodine content in food, the operating conditions of the inductively coupled plasma mass spectrometer include: radio frequency power 1550 watts; the flow rate of plasma gas is 15 liters/minute; the flow rate of the carrier gas is 0.80-0.90L/min; the auxiliary air flow rate is 0.30-0.40L/min; the pump speed is 0.10 r/s during analysis; the sampling depth is 8 mm-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 collision cell gas helium flow rate is 4 ml/min to 5 ml/min.
Has the advantages that: the invention provides a method for determining iodine content in food based on an inductively coupled plasma mass spectrometry, which 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, determining iodine concentration through 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 realize, and has a wide market application prospect.
Detailed Description
The invention provides a method for determining 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, determining 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 tetramethylammonium hydroxide solution, is determined by an inductively coupled plasma mass spectrometer, is qualitative by the specific mass number 127 (mass-to-charge ratio, m/z) of the iodine, and is quantitative by the direct proportion of the intensity ratio of mass spectrum signals of the iodine and an internal standard element to the concentration of the iodine, so that the content of the iodine in the sample is rapidly determined. The determination method has the characteristics of high sensitivity, high precision, high anti-interference performance and 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 step S1, placing the extracting solution and food with preset mass in a centrifuge tube, shaking up, adding water into the shaking-up solution, and diluting the volume of the shaking-up solution to a set multiple; the diluted shaking solution was centrifuged, and the supernatant was extracted and filtered to prepare a sample solution. The food comprises an extracting solution and a food, wherein the extracting solution is a tetramethylammonium 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 phase filtration membrane to obtain the sample solution.
In this embodiment, mix food and extract and shake even back and dilute to the centrifugation, filter the supernatant and be favorable to fully extracting the iodine in the food, and avoid containing solid impurity in the sample solution who draws, thereby ensure to avoid insoluble impurity to the harmful effects of iodine content survey in the food, avoid solid impurity to block up inductively coupled plasma mass spectrograph pipeline simultaneously, protected inductively coupled plasma mass spectrograph, ensured going on smoothly of big sample detection.
In a preferred embodiment, the diluted shaking solution is placed in an oven or a water bath shaker at 85 ℃ +/-5 ℃ for extraction for 3 hours and then 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 liquid is prepared by using the same method as in step S1. The method specifically comprises the following steps: placing the extracting solution in a centrifuge tube, shaking up, 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; the diluted shaking solution was centrifuged, and the supernatant was extracted and filtered to obtain a sample blank solution without food. In both steps S1 and S2, the dilution setting factor of the shaking solutions was 10 times. The centrifugal rotating speed of the centrifugal tubes is more than 3000 r/min, and the centrifugal time is 10 min.
Step S3 is to prepare iodine series standard solution; respectively sucking a proper volume of iodine standard use solution, and preparing a series of standard solutions with the 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 the diluent; wherein the iodine standard use solution is potassium iodide or potassium iodate solution with the concentration of 10 mug/L, and the diluent is tetramethylammonium hydroxide aqueous solution with the mass fraction of 0.5%.
Step S4 is to prepare an internal standard use solution: taking any one single-element or multi-element standard stock solution of tellurium, indium, rhodium and rhenium as an internal standard, and diluting the internal standard stock solution into internal standard use solution by using diluent; the concentration of the internal standard use solution is 10-100 mug/L; the diluent is a tetramethylammonium hydroxide aqueous solution with the mass fraction of 0.5%. In addition, for samples of complex matrices, 1% to 2% isopropanol (volume percent concentration after mixing with sample) can be added to the internal standard.
Wherein the preparation steps of the standard stock solution (1000 mg/L) are as follows: 0.1685 g of potassium iodate which is dried to constant weight at 180 +/-2 ℃ is weighed, dissolved by water and metered to 100 mL; or 0.1307 g of potassium iodide dried by a silica gel dryer for 24 hours, dissolved and diluted to 100 mL by water, and stored in a brown bottle; iodine standard solutions that are certified by countries and that grant certificates of standard substances may also be used.
Step S5 is to determine iodine mass concentration: and respectively injecting the sample blank liquid and the sample solution into an inductively coupled plasma mass spectrometer, and calculating the iodine mass concentration in the sample blank liquid and the sample solution according to the drawn standard curve. Wherein the standard curve is plotted as: injecting iodine series standard solution and internal standard use solution into an inductively coupled plasma mass spectrometer, and measuring signal response values of iodine and internal standard elements; and drawing a standard curve by taking the concentration of the iodine as an abscissa and the ratio of the 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. The method provided by the invention has the advantages that the sample introduction cleaning time of the inductively coupled plasma mass spectrometer is prolonged, so that residual iodine in a sample introduction system can be cleaned more sufficiently, 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 generation of a chemical formula of 5I- + IO3- + 6H + ⇌ 3I2 + 3H2O, and the purity of a reagent and the memory effect are main reasons of high background, so that the detection limit of the method can be increased. Therefore, in the experimental process, the sample injection system needs to be fully cleaned by using the extracting solution between sample tests, and the washing time needs to be more than 60 seconds.
In particular, the operating conditions of the inductively coupled plasma mass spectrometer include: radio frequency power 1550 watts; the flow rate of plasma gas is 15 liters/minute; the flow rate of the carrier gas is 0.80-0.90L/min; the auxiliary air flow rate is 0.30-0.40L/min; the pump speed is 0.10 r/s during analysis; the sampling depth is 8 mm-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 collision cell gas helium flow rate is 4 ml/min to 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 solution to be detected, and the unit is mug/L; c. C0The concentration of iodine in the blank liquid is expressed in microgram/L; v is the constant volume, and the unit is mL; f is the dilution multiple; and m is the weighed mass of the sample, and the unit is g. In the invention, the sample volume is 0.5 g, the constant volume is 50 mL, the detection limit of the method in the embodiment of the invention is 10 mug/kg, and the quantitative limit is 30 mug/kg. In the calculation formula of the invention, the concentration of the diluted solution is multiplied by the dilution times, and then the concentration of the sample blank solution is subtracted to calculate the iodine content, so that the calculation is more accurate (because the dilution is only the dilution of the sample solution).
The precision and accuracy of the measurement method of the present invention are investigated by specific experiments.
The specific embodiment is as follows:
method precision and accuracy experiment:
the methodology research is carried out by adopting imported and domestic standard reference substances of different food matrixes, different internal standards or internal standards with different mass numbers are adopted for correction in a He mode, the relative standard deviation of 7 times of independent measurement is less than 10%, the measurement results are all in an uncertain range of standard reference values, the detailed results are shown in a table 1, a special experiment is carried out on the test of iodine in the seasoning salt, and the method is suitable for the measurement of the iodine salt from the results in tables 1-2.
Table 1-1 accuracy experiment N =7 units: mg/kg
Table 1-2 accuracy experiments-test of seasoning salts N =7 units: mg/kg
Claims (8)
1. A method for determining iodine content in food based on inductively coupled plasma mass spectrometry is characterized by comprising the following steps:
s1, placing the extracting solution and food with preset mass in a centrifuge tube, shaking up, adding water into the shaking-up solution, and diluting the volume of the shaking-up solution to a set multiple; centrifuging the diluted shaking solution, extracting supernatant and filtering to prepare a sample solution; wherein the extracting solution is a tetramethylammonium hydroxide aqueous solution with the mass fraction of 5%;
s2, placing the extracting solution into a centrifugal tube, shaking up, 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 solution, extracting supernatant, and filtering to obtain a sample blank solution without food; wherein the extracting solution is a tetramethylammonium hydroxide aqueous solution with the mass fraction of 5%;
s3, preparing iodine series standard solution; respectively sucking a proper volume of iodine standard use solution, and preparing a series of standard solutions with the 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 the diluent; wherein the iodine standard use solution is potassium iodide or potassium iodate solution with the concentration of 10 mug/L, and the diluent is tetramethylammonium hydroxide aqueous solution with the mass fraction of 0.5%;
s4, preparing an internal standard use solution: taking any one single-element or multi-element standard stock solution of tellurium, indium, rhodium and rhenium as an internal standard, and diluting the internal standard stock solution into internal standard use solution by using diluent; the concentration of the internal standard use solution is 10-100 mug/L; the diluent is a tetramethylammonium 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 iodine mass concentration 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 solution to be detected, and the unit is mug/L;
c0the concentration of iodine in the blank liquid is expressed in microgram/L; v is the constant volume, and the unit is mL; f is the dilution multiple; and m is the weighed mass of the sample, and the unit is g.
2. The method for determining the iodine content of a food according to claim 1, wherein said standard curve in step S5 is plotted as: injecting iodine series standard solution and internal standard use solution into an inductively coupled plasma mass spectrometer, and measuring signal response values of iodine and internal standard elements; and drawing a standard curve by taking the concentration of the iodine as an abscissa and the ratio of the iodine to the response signal value of the selected internal standard element as an ordinate.
3. The method for determining the iodine content in a food according to claim 1, wherein in step S5, the cleaning time of the sample injection system of the inductively coupled plasma mass spectrometer is greater than 60 seconds.
4. The method for determining the iodine content in a food according to claim 1, wherein the predetermined mass of the food is 0.2 to 1.0g in step S1.
5. The method of claim 1, wherein the dilution setting factor of the shaking solution is 10 times in steps S1 and S2.
6. The method of claim 1, wherein the centrifuge tube is rotated at a speed of more than 3000 rpm for 10 minutes in each of steps S1 and S2.
7. The method for determining the iodine content in a food according to claim 1, wherein said sample solution is prepared after said supernatant is filtered by a 0.45 μm aqueous phase filtration membrane in step S1.
8. The method for determining iodine content in a food product according to claim 1, wherein in steps S1 and S2, said operating conditions of said inductively coupled plasma mass spectrometer comprise: radio frequency power 1550 watts; the flow rate of plasma gas is 15 liters/minute; the flow rate of the carrier gas is 0.80-0.90L/min; the auxiliary air flow rate is 0.30-0.40L/min; the pump speed is 0.10 r/s during analysis; the sampling depth is 8 mm-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 collision cell gas helium flow rate is 4 ml/min to 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 true CN114076793A (en) | 2022-02-22 |
| CN114076793B 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 |
|---|---|
| CN114076793B (en) | 2023-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108872448B (en) | Method for detecting 5 sweetening agents in tobacco essence by ultra-high performance liquid chromatography-tandem mass spectrometry | |
| CN106324144A (en) | Method for detecting chlorate, perchlorate and bromate from milk powder and infant formula milk powder by hydrophilic interaction chromatography-tandem mass spectrometry | |
| CN101556231A (en) | Ocean air salinity measuring method | |
| CN114137140A (en) | Method for synchronously detecting food additives and heavy metal content in food by reverse phase HPLC-ICP-MS method | |
| CN103267821A (en) | HPLC-ELSD (high performance liquid chromatography-evaporation light-scattering detection) measuring method of grape berry sugar | |
| CN109781889A (en) | A kind of measuring method of 24 kinds of mycotoxins in nourishing rice flour for babies | |
| CN114137134A (en) | Method for separating selenium form by high performance liquid chromatography-inductively coupled plasma mass spectrometry | |
| Guo et al. | Highly sensitive fluorescence methods for the determination of alfuzosin, doxazosin, terazosin and prazosin in pharmaceutical formulations, plasma and urine | |
| CN103091418B (en) | Method for detecting plasticizing agent | |
| CN103728263B (en) | A kind of cassia seeds polysaccharides quantitative detecting method | |
| CN109541050B (en) | Method for simultaneously determining content of maltol in edible vegetable oil by gas chromatography | |
| CN114076793A (en) | Method for determining iodine content in food based on inductively coupled plasma mass spectrometry | |
| CN103728380B (en) | A kind of ion liquid abstraction/HPLC detects the method that in aquatic products, fleraxacin is residual | |
| Gürkan et al. | Determination of trace cadmium in nonalcoholic beverages by coupling cloud point extraction with spectrophotometry. | |
| CN102788834B (en) | Method for quickly measuring soluble sugar in fruit | |
| Ruan et al. | Development of a dispersive liquid–liquid microextraction technique for the analysis of citrinin, alternariol and alternariol monomethyl ether in fruit juices | |
| CN111474279B (en) | Method and kit for detecting macrolide antibiotic compounds | |
| 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 | |
| CN114935616A (en) | Method for detecting cosmetic forbidden substances | |
| Altunay et al. | Ultrasound assisted extraction and spectrophotometric determination of trace selenium in water, food and vegetable samples | |
| CN108732281B (en) | Method for measuring content of hydroxymethylfurfural in honey | |
| Parsons | Determination of photosynthetic pigments in sea-water. A survey of methods | |
| CN109187798A (en) | Detect that non-, propoxyl group Chinese mugwort that non-, N- ethyl Tadalafei of ground of demethyl card rolling land and hydroxypropyl demethyl Tadalafei method | |
| CN117147711B (en) | Method for detecting hypophosphite, orthophosphate, bromate and bromide ions in wheat flour by on-line absorption and release technology | |
| CN108279228A (en) | A method of utilizing acetate ion concentration in the Raman spectroscopy acid solution of the silica dioxide granule containing methylene blue |
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 |