CN102608279A - Method for analyzing and detecting nano titanium dioxide in food - Google Patents
Method for analyzing and detecting nano titanium dioxide in food Download PDFInfo
- Publication number
- CN102608279A CN102608279A CN2012100694795A CN201210069479A CN102608279A CN 102608279 A CN102608279 A CN 102608279A CN 2012100694795 A CN2012100694795 A CN 2012100694795A CN 201210069479 A CN201210069479 A CN 201210069479A CN 102608279 A CN102608279 A CN 102608279A
- Authority
- CN
- China
- Prior art keywords
- titanium dioxide
- food
- nano titanium
- titania
- analyzing
- 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.)
- Pending
Links
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention discloses a method for analyzing and detecting nano titanium dioxide in food. Aiming at a typical food sample containing titanium dioxide additives, the titanium dioxide is dissolved out by adopting different pretreatment processes, is enriched by using centrifugation and is cleaned and separated by using organic solvents, and then, the existence and the particle size distribution of the nano titanium dioxide are determined through the observation by a transmission electron microscope and the accounting by software. Meanwhile, the nano titanium dioxide obtained through separation is comprehensively characterized, the basic information of nanoparticles is comprehensively characterized by using a scanning electron microscope, an X-ray diffractometer, an X-ray energy spectrum, and the like, the total content of the titanium dioxide is determined by using an inductance-coupling plasma emission spectrometer, and the mass concentration data on the nanoparticles are provided by combining with the particle size distribution. According to the method for analyzing and detecting the nano titanium dioxide in the food, the operation of separation is simple, the nano titanium dioxide particles in the food can be efficiently separated out, and the method is applicable to the detection of the nano titanium dioxide in a variety of food, so that the basic data for the marking and the safety evaluation of nano-products are provided.
Description
Technical field
The present invention relates to a kind of check and analysis method of nano-scale food additives.This method is convenient, and is quick, efficient, belongs to nanometer analytical chemistry and nano inorganic material field.
Background technology
Along with the fast development of 21 century nano material, the application of nano material has related to fields such as food, medicine, coating, plastics, catalyzer, electronic product.The nanometer product of constantly laying out shelf makes the chance of consumer's contact nanometer material increase greatly.But owing to discover that the part nano material has negative effect, its safety issue receives extensive concern, and people suspect for the security of nanometer product.For the healthy sustainable development of public health and nanometer technology, the nano material in the analyzing and testing Related product and that it is carried out safety evaluation is extremely urgent.
In recent years, nanometer technology is fast-developing in food industries, and nano material is used to improve the quality and the color of food, improves the absorption efficiency of nutritional labeling in the food.The part food additives such as titania, are commonly called as titanium white powder simultaneously, have also reached nanoscale because manufacturing process is improved.Human body is taken in the nano material possibility through food and is constantly increased.Thereby scientific research personnel and departments of government begin to pay close attention to how the nano material in the food is carried out quantitative and qualitative analysis; And then assessment crowd exposure level; Assessment of the sector-style of going forward side by side danger and safety evaluatio are formulated laws and regulations on the management, the productive consumption of standard nanometer product at last on this basis.But because food substrate is complicated, the nano material content in the food is low, how from food, to isolate the nano material of artificial interpolation and carries out the big difficult point that analyzing and testing is this field.
Summary of the invention
In order to solve the prior art problem, the object of the present invention is to provide the method for nano titanium oxide in a kind of analyzing and testing food.Analyte detection process is simple to operate, can isolate the titanium dioxide nanoparticle in the food efficiently, and the applicability of method is good, can be used for the numerous food sample.The qualitative and quantitative that this method gives the nano titanium oxide in the complete food samples characterizes, for the sign and the safety evaluatio of nanometer product provide master data from now on.
For reaching the foregoing invention purpose, the present invention adopts following technical proposals:
The method of nano titanium oxide comprises the steps: in a kind of analyzing and testing food
1) from food samples, isolates titanium dioxide nanoparticle;
2) the isolated titanium dioxide granule of step 1) is cleared up, constant volume utilizes inductive coupling plasma emission spectrograph to measure titanium elements content, and converses the titania total amount;
3) then, the isolated titanium dioxide nanoparticle of step 1) is utilized transmission electron microscope observation granule-morphology and particle diameter,, obtain the titanium dioxide granule particle size distribution data through the size distribution of software statistics titanium dioxide granule;
4) with the step 3) while, the nano titanium oxide that from step 1), obtains is carried out qualitative and quantitative comprehensive sign, is:
ⅰ) utilize scanning electron microscope that its pattern, size and surface are characterized the isolated titanium dioxide granule of step 1);
ⅱ) utilize X-ray diffractometer to characterize the isolated titanium dioxide nanoparticle of step 1), obtain its X ray diffracting spectrum, analyze the crystal formation of titania;
ⅲ) utilize high resolving power transmitted electron Electronic Speculum to confirm interplanar distance and element composition, the i.e. crystal formation and the chemical composition of the isolated nano titanium oxide of step 1);
ⅳ) integrating step 2) in the titanium dioxide granule particle size distribution data that obtains in the titania total content that obtains and the step 3), draw the mass concentration data and the particle number concentrations data of titanium dioxide nanoparticle.
As embodied technique scheme of the present invention, above-mentioned steps 1) in from food samples, isolate titanium dioxide nanoparticle process comprise the steps:
A) adopt the pre-treatment process with the titania stripping food samples in the step 1), obtain white solution;
B) then, pour in the centrifuge tube centrifugal back collecting precipitation thing into dissolving the white solution that in the step a);
C) then, the sediment in the step b) with cleaning fluid cleaning, drying, is isolated titanium dioxide granule.
Cleaning fluid in the step c) in the technical scheme of the present invention is preferably the various combination of deionized water, acetone, absolute ethyl alcohol and acetate.
As first kind of technical scheme of the present invention:
Food samples in the step 1) is the sugar-coat gum sample;
Step c) is specially, and with the sediment in the step b) with washed with de-ionized water once, uses acetone twice then, cleans once with absolute ethyl alcohol again, then carries out freeze-drying, can from the sugar-coat chewing gum, isolate titania.
As second kind of technical scheme of the present invention:
Food samples in the step 1) is the candy sample;
Step c) is specially, and with the sediment in the step b) with washed with de-ionized water once, then with acetone once, cleans twice with acetate again, also cleans once with absolute ethyl alcohol, then carries out freeze-drying, can from candy, isolate titania.
As the third technical scheme of the present invention:
Food samples in the step 1) is the instant sample;
Step c) is specially, and with the sediment washed with de-ionized water in the step b) once, uses acetone twice then, cleans once with absolute ethyl alcohol again, then carries out freeze-drying, can from instant, isolate titania.
Further optimal technical scheme
as technique scheme of the present invention; Above-mentioned steps a) in; The pre-treatment process adopts deionized water that food samples is dissolved fully, and titania is dissolved.
Further optimal technical scheme
as technique scheme of the present invention; In step 2) in; The system of clearing up with red fuming nitric acid (RFNA) and 40% hydrofluorite; The digestion condition of 190 ° of C; On microwave dissolver, clear up step 1) isolate titania, clear up complete back with 2% rare nitric acid constant volume.
Further optimal technical scheme
as technique scheme of the present invention; Image processing software in the step 3) is Flame Image Process and analysis library software software; Can add up the titanium dioxide nanoparticle size distribution that from step 1), obtains, and obtain histogram of particle size distribution.
The present invention has following conspicuous outstanding substantive distinguishing features and remarkable advantage compared with prior art:
The lock out operation means of the method for nano titanium oxide are simple in the analyzing and testing food of the present invention, can isolate the titanium dioxide nanoparticle in the food efficiently, and the applicability of method is good, can be used for the numerous food sample.Be example with a kind of food samples simultaneously, the scheme that provides the nano particle multianalysis to characterize.What this method was complete has carried out the qualitative and quantitative sign to the nano material in the food samples, for the sign and the safety evaluatio of nanometer product provide master data from now on.
Description of drawings
Fig. 1 be the embodiment of the invention one from 6 kinds of chewing gums, isolate transmission electron microscope photo and the histogram of particle size distribution that statistics obtains of nano titanium oxide.
Fig. 2 is the electron scanning micrograph of the embodiment of the invention one isolated nano titanium oxide from a kind of chewing gum.
Fig. 3 is the X-ray diffractogram of the embodiment of the invention one isolated nano titanium oxide from a kind of chewing gum.
Fig. 4 is the high resolution transmission electron microscope figure and the X-ray energy spectrum figure of the embodiment of the invention one isolated nano titanium oxide from a kind of chewing gum.
Fig. 5 is the transmission electron microscope photo of the embodiment of the invention two isolated nano titanium oxide from 3 kinds of candies and the histogram of particle size distribution that statistics obtains.
Fig. 6 is the transmission electron microscope photo of the embodiment of the invention three isolated nano titanium oxide from a kind of instant and the histogram of particle size distribution that statistics obtains.
Embodiment
In conjunction with accompanying drawing, details are as follows to the preferred embodiments of the present invention:
Embodiment one:
Referring to Fig. 1～Fig. 4, the method for nano titanium oxide is characterized in that in a kind of analyzing and testing food, comprises the steps:
1) from food samples, isolates titanium dioxide nanoparticle;
2) the isolated titanium dioxide granule of step 1) is cleared up, constant volume utilizes inductive coupling plasma emission spectrograph to measure titanium elements content, and converses the titania total amount;
3) then, the isolated titanium dioxide nanoparticle of step 1) is utilized transmission electron microscope observation granule-morphology and particle diameter,, obtain the titanium dioxide granule particle size distribution data through the size distribution of software statistics titanium dioxide granule;
4) with the step 3) while, the nano titanium oxide that from step 1), obtains is carried out qualitative and quantitative comprehensive sign, is:
ⅰ) utilize scanning electron microscope that its pattern, size and surface are characterized the isolated titanium dioxide granule of step 1);
ⅱ) utilize X-ray diffractometer to characterize the isolated titanium dioxide nanoparticle of step 1), obtain its X ray diffracting spectrum, analyze the crystal formation of titania;
ⅲ) utilize high resolving power transmitted electron Electronic Speculum to confirm interplanar distance and element composition, the i.e. crystal formation and the chemical composition of the isolated nano titanium oxide of step 1);
ⅳ) integrating step 2) in the titanium dioxide granule particle size distribution data that obtains in the titania total content that obtains and the step 3), draw the mass concentration data and the particle number concentrations data of titanium dioxide nanoparticle.
Present embodiment utilizes a kind of simple and easy to do method; From food samples, isolate titanium dioxide granule; Utilize centrifugation method to reach the purpose of enrichment titania; With an organic solvent clean isolated titania, and utilize existence that Electron Microscopy confirmed nano particle with and size distribution; Simultaneously the nano titanium oxide in the sample is carried out comprehensive qualitative and quantitative phenetic analysis; Utilize multiple technologies that the parameter such as pattern, particle number concentrations, mass concentration, size distribution, crystal formation of nano titanium oxide is provided, for its product indicia and safety evaluatio have provided essential information.The method operational means of nano titanium oxide is simple in the present embodiment analyzing and testing food, can isolate the titanium dioxide nanoparticle in the food efficiently, and the applicability of method is good, can be used for the numerous food sample.
In the present embodiment, the process of from food samples, isolating titanium dioxide nanoparticle in the step 1) comprises the steps:
A) adopt the pre-treatment process with the titania stripping food samples in the step 1), obtain white solution;
B) then, pour in the centrifuge tube centrifugal back collecting precipitation thing into dissolving the white solution that in the step a);
C) then, the sediment in the step b) with cleaning fluid cleaning, drying, is isolated titanium dioxide granule.
In the present embodiment; Food samples to sampling adopts the different pretreatment process with the titania stripping; Pour in the centrifuge tube dissolving the white solution that; Utilize after centrifugal back collecting precipitation, deposition clean with cleaning fluid transmission electron microscope observation isolate nano titanium oxide, and confirm particle grain size distribution through software statistics.Present embodiment lock out operation means are simple, can isolate the titanium dioxide nanoparticle in the food efficiently, and the applicability of method is good, can be used for the numerous food sample.
In the present embodiment, the cleaning fluid in the step c) is deionized water, acetone, absolute ethyl alcohol and acetate various combination.In the present embodiment; Food samples to sampling adopts the different pretreatment process with the titania stripping; Pour in the centrifuge tube dissolving the white solution that; Centrifugal back collecting precipitation, utilize after precipitate with deionized water, acetone, absolute ethyl alcohol, acetate clean transmission electron microscope observation isolate nano titanium oxide, and confirm particle grain size distribution through software statistics.
In the present embodiment, be specially:
Food samples in the step 1) is the sugar-coat gum sample;
Step c) is specially, and with the sediment in the step b) with washed with de-ionized water once, uses acetone twice then, cleans once with absolute ethyl alcohol again, then carries out freeze-drying, can from the sugar-coat chewing gum, isolate titania.
Present embodiment is an example with the sugar-coat gum sample, the scheme that provides the titanium dioxide nanoparticle multianalysis to characterize.Sample sugar-coat chewing gum sugar-coat is dissolved with 12.5 ml solvents fully, pour in the centrifuge tube, centrifugal 15 minutes with 21000 g with dissolving the white solution that.Centrifugal back collecting precipitation, after precipitate with deionized water was cleaned once, twice of acetone, absolute ethyl alcohol clean once, freeze-drying obtained isolated titania from chewing gum.Isolated titania is disperseed with spreading agent, drop on the carbon plating supporting film, utilize the transmitted electron electron microscopic observation, and obtain histogram of particle size distribution with the software statistics particle diameter, to the identical disposal route of chewing gum employing of other kinds, as shown in Figure 1.Also isolated titania is disperseed with spreading agent again simultaneously, drop on the silicon chip, utilize scanning electron microscope that it is characterized, as shown in Figure 2; Utilize X-ray diffractometer to characterize isolated titanium dioxide nanoparticle, obtain its X-ray diffraction pattern, as shown in Figure 3; Utilize high resolving power transmitted electron Electronic Speculum to confirm the interplanar distance and the element composition of isolated nano titanium oxide, as shown in Figure 4.Integrating step 2 simultaneously) the titanium dioxide granule particle size distribution data that obtains in titania total content that obtains in and the step 3) draws the mass concentration data and the particle number concentrations data of titanium dioxide nanoparticle.
In the present embodiment; The sugar-coat chewing gum is carried out the sampling Detection analysis; Titania to wherein characterizes comprehensively, utilizes scanning electron microscope, X-ray diffractometer, nano particle tracer technique, X-ray energy spectrum figure etc. to characterize the essential information of nano particle comprehensively.Utilize inductive coupling plasma emission spectrograph to measure the total content of titania simultaneously, and provide the mass concentration data of nano particle according to size distribution.
Embodiment two:
The technical scheme of present embodiment and embodiment one is basic identical, and difference is:
In the present embodiment, referring to Fig. 5, be specially:
Food samples in the step 1) is the candy sample;
Step c) is specially, and with the sediment in the step b) with washed with de-ionized water once, then with acetone once, cleans twice with acetate again, also cleans once with absolute ethyl alcohol, then carries out freeze-drying, can from candy, isolate titania.
The sample candy is dissolved with 20 ml solvents fully, pour in the centrifuge tube, centrifugal 15 minutes with 21000 g with dissolving the solution that.Centrifugal back collecting precipitation, precipitate with deionized water is cleaned once, acetone once, acetate cleans twice, after absolute ethyl alcohol cleans once; Freeze-drying obtains isolated titania from candy; Titania is disperseed with spreading agent, drop on the carbon plating supporting film, utilize the transmitted electron electron microscopic observation; And obtain histogram of particle size distribution with the software statistics particle diameter, other brand candies are adopted identical disposal route.
Embodiment three:
The technical scheme of present embodiment and previous embodiment is basic identical, and difference is:
In the present embodiment, referring to Fig. 6, be specially:
Food samples in the step 1) is the instant sample;
Step c) is specially, and with the sediment washed with de-ionized water in the step b) once, uses acetone twice then, cleans once with absolute ethyl alcohol again, then carries out freeze-drying, can from instant, isolate titania.
A small amount of instant powder is dissolved with the 20ml solvent fully, after the powder dissolving fully solution is poured in the centrifuge tube, centrifugal 15 minutes with 21000g.Centrifugal back collecting precipitation; After precipitate with deionized water is cleaned once, twice of acetone, absolute ethyl alcohol clean once; Freeze-drying obtains isolated titania from instant, and titania is disperseed with spreading agent, drops on the carbon plating supporting film; Utilize the transmitted electron electron microscopic observation, and obtain histogram of particle size distribution with the software statistics particle diameter.
Embodiment four:
The technical scheme of present embodiment and previous embodiment is basic identical, and difference is:
In the present embodiment, in step 1), the pre-treatment process adopts deionized water that food samples is dissolved fully, and titania is dissolved.Afterwards, in step 2) in, with the system of clearing up of red fuming nitric acid (RFNA) and 40% hydrofluorite, the digestion condition of 190 ° of C, on microwave dissolver, clear up step 1) isolate titania, clear up complete back with 2% rare nitric acid constant volume.In the present embodiment; Isolated titanium dioxide granule is cleared up; Constant volume utilizes inductive coupling plasma emission spectrograph to measure titanium elements content, and converses the titania total amount; Integrating step 2) the titanium dioxide granule particle size distribution data that obtains in titania total content that obtains in and the step 3) draws the mass concentration data and the particle number concentrations data of titanium dioxide nanoparticle.As shown in table 1; Be present embodiment isolated nano titanium oxide (diameter is less than 200nm) mass concentration and particle number concentrations data in all titania from 6 kind chewing gums, can indicate and safety evaluatio has provided accurate relevant information for chewing gum product.
Table 1. is nano titanium oxide in gum sample
Mass concentration in all titania and particle number concentrations
|
| Kind | 1 |
|
|
|
|
Kind 6 |
| The nano titanium oxide mass concentration | 65.10% | 71.20% | 86.10% | 85.80% | 82.50% | 72.70% | |
| Titanium dioxide nanoparticle is counted concentration | 93.20% | 95.10% | 97.60% | 97.80% | 97.20% | 93.50% |
Embodiment five:
The technical scheme of present embodiment and previous embodiment is basic identical, and difference is:
In the present embodiment, step 2) software in is preferably Flame Image Process and analyzes library software software, can add up the titanium dioxide nanoparticle size distribution that from step 1), obtains, and obtain histogram of particle size distribution.This Flame Image Process can adopt ImageJ software with analysis library software software, and ImageJ software of the same type can carry out the zone and the pixels statistics of picture, carries out spacing, angle calculation, can create histogram and sectional view, carries out Fourier transform.
Combine accompanying drawing that the embodiment of the invention is illustrated above; But the invention is not restricted to the foregoing description; Can also make multiple variation according to the purpose of innovation and creation of the present invention; Change, the modification of making under all spirit and principles according to technical scheme of the present invention, substitute, combination, simplify, all should be the substitute mode of equivalence, as long as goal of the invention according to the invention; Only otherwise deviate from the know-why and the inventive concept of the method for nano titanium oxide in the analyzing and testing food of the present invention, all belong to protection scope of the present invention.
Claims (9)
1. the method for nano titanium oxide in the analyzing and testing food is characterized in that, comprises the steps:
1) from food samples, isolates titanium dioxide nanoparticle;
2) the isolated titanium dioxide granule of step 1) is cleared up, constant volume utilizes inductive coupling plasma emission spectrograph to measure titanium elements content, and converses the titania total amount;
3) then, the isolated titanium dioxide nanoparticle of step 1) is utilized transmission electron microscope observation granule-morphology and particle diameter,, obtain the titanium dioxide granule particle size distribution data through the size distribution of software statistics titanium dioxide granule;
4) with the step 3) while, the nano titanium oxide that from step 1), obtains is carried out qualitative and quantitative comprehensive sign, is:
ⅰ) utilize scanning electron microscope that its pattern, size and surface are characterized the isolated titanium dioxide granule of step 1);
ⅱ) utilize X-ray diffractometer to characterize the isolated titanium dioxide nanoparticle of step 1), obtain its X ray diffracting spectrum, analyze the crystal formation of titania;
ⅲ) utilize high resolving power transmitted electron Electronic Speculum to confirm interplanar distance and element composition, the i.e. crystal formation and the chemical composition of the isolated nano titanium oxide of step 1);
ⅳ) integrating step 2) in the titanium dioxide granule particle size distribution data that obtains in the titania total content that obtains and the step 3), draw the mass concentration data and the particle number concentrations data of titanium dioxide nanoparticle.
2. the method for nano titanium oxide in the analyzing and testing food according to claim 1 is characterized in that: the process of from food samples, isolating titanium dioxide nanoparticle in the said step 1) comprises the steps:
A) adopt the pre-treatment process with the titania stripping food samples in the said step 1), obtain white solution;
B) then, pour in the centrifuge tube centrifugal back collecting precipitation thing into dissolving the white solution that in the said step a);
C) then, the sediment in the said step b) with cleaning fluid cleaning, drying, is isolated titanium dioxide granule.
3. the method for nano titanium oxide in the analyzing and testing food according to claim 2 is characterized in that: the cleaning fluid in the said step c) is the various combination of deionized water, acetone, absolute ethyl alcohol and acetate.
4. the method for nano titanium oxide in the analyzing and testing food according to claim 3 is characterized in that:
Food samples in the said step 1) is the sugar-coat gum sample;
Said step c) is specially, and with the sediment in the said step b) with washed with de-ionized water once, uses acetone twice then, cleans once with absolute ethyl alcohol again, then carries out freeze-drying, can from the sugar-coat chewing gum, isolate titania.
5. the method for nano titanium oxide in the analyzing and testing food according to claim 3 is characterized in that:
Food samples in the said step 1) is the candy sample;
Said step c) is specially, and with the sediment in the said step b) with washed with de-ionized water once, then with acetone once, cleans twice with acetate again, also cleans once with absolute ethyl alcohol, then carries out freeze-drying, can from candy, isolate titania.
6. the method for nano titanium oxide in the analyzing and testing food according to claim 3 is characterized in that:
Food samples in the said step 1) is the instant sample;
Said step c) is specially, and with the sediment washed with de-ionized water in the said step b) once, uses acetone twice then, cleans once with absolute ethyl alcohol again, then carries out freeze-drying, can from instant, isolate titania.
7. according to the method for nano titanium oxide in any described analyzing and testing food in the claim 2～6, it is characterized in that: in said step a), said pre-treatment process adopts deionized water that food samples is dissolved fully, and titania is dissolved.
8. according to the method for nano titanium oxide in any described analyzing and testing food in the claim 1～6; It is characterized in that: at said step ⅳ) in; The system of clearing up with red fuming nitric acid (RFNA) and 40% hydrofluorite; The digestion condition of 190 ° of C, on microwave dissolver, clear up said step 1) isolate titania, clear up complete back with 2% rare nitric acid constant volume.
9. according to the method for nano titanium oxide in any described analyzing and testing food in the claim 1～6; It is characterized in that: the software in the said step 3) is Flame Image Process and analysis library software; Can add up the titanium dioxide nanoparticle size distribution that from said step 1), obtains, and obtain histogram of particle size distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100694795A CN102608279A (en) | 2012-03-16 | 2012-03-16 | Method for analyzing and detecting nano titanium dioxide in food |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100694795A CN102608279A (en) | 2012-03-16 | 2012-03-16 | Method for analyzing and detecting nano titanium dioxide in food |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102608279A true CN102608279A (en) | 2012-07-25 |
Family
ID=46525819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100694795A Pending CN102608279A (en) | 2012-03-16 | 2012-03-16 | Method for analyzing and detecting nano titanium dioxide in food |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102608279A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914535A (en) * | 2012-10-18 | 2013-02-06 | 上海大学 | Method for separating and detecting nano silica in food |
| CN107860689A (en) * | 2017-11-07 | 2018-03-30 | 青岛大学 | A kind of assay method of silver nano material particle size and its content |
| CN109916941A (en) * | 2019-03-25 | 2019-06-21 | 苏州大学 | A kind of premixing powder 3D printing method for separating and detecting |
| CN113237869A (en) * | 2021-05-19 | 2021-08-10 | 宁波江丰电子材料股份有限公司 | Detect Ti3O5Method of compounding |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1383914A (en) * | 2001-04-30 | 2002-12-11 | 施利毅 | Prepn process of nano level composite photocatalyst |
| CN1415550A (en) * | 2002-12-12 | 2003-05-07 | 中山大学 | Method for preparing nano titanium dioxide in anatase type from fluid of hydrothermal crystallized titanium sulfate |
| US7255847B2 (en) * | 2004-11-16 | 2007-08-14 | The Hong Kong Polytechnic University | Method for making single-phase anatase titanium oxide |
| CN102266748A (en) * | 2011-06-09 | 2011-12-07 | 中山大学 | Method for preparing titanic acid/titanium dioxide mixed nano-powder material |
-
2012
- 2012-03-16 CN CN2012100694795A patent/CN102608279A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1383914A (en) * | 2001-04-30 | 2002-12-11 | 施利毅 | Prepn process of nano level composite photocatalyst |
| CN1415550A (en) * | 2002-12-12 | 2003-05-07 | 中山大学 | Method for preparing nano titanium dioxide in anatase type from fluid of hydrothermal crystallized titanium sulfate |
| US7255847B2 (en) * | 2004-11-16 | 2007-08-14 | The Hong Kong Polytechnic University | Method for making single-phase anatase titanium oxide |
| CN102266748A (en) * | 2011-06-09 | 2011-12-07 | 中山大学 | Method for preparing titanic acid/titanium dioxide mixed nano-powder material |
Non-Patent Citations (2)
| Title |
|---|
| 刘元方等: "纳米材料生物效应研究和安全性评价前沿", 《自然杂志》 * |
| 李俊芳等: "防晒化妆品中纳米TiO2的检测技术研究", 《分析仪器》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914535A (en) * | 2012-10-18 | 2013-02-06 | 上海大学 | Method for separating and detecting nano silica in food |
| CN107860689A (en) * | 2017-11-07 | 2018-03-30 | 青岛大学 | A kind of assay method of silver nano material particle size and its content |
| CN107860689B (en) * | 2017-11-07 | 2019-11-08 | 青岛大学 | A kind of measuring method of silver nano material particle size and its content |
| CN109916941A (en) * | 2019-03-25 | 2019-06-21 | 苏州大学 | A kind of premixing powder 3D printing method for separating and detecting |
| CN109916941B (en) * | 2019-03-25 | 2021-04-30 | 苏州大学 | 3D printing separation detection method for premixed powder |
| CN113237869A (en) * | 2021-05-19 | 2021-08-10 | 宁波江丰电子材料股份有限公司 | Detect Ti3O5Method of compounding |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mozhayeva et al. | A critical review of single particle inductively coupled plasma mass spectrometry–A step towards an ideal method for nanomaterial characterization | |
| Ansi et al. | Table sugar derived Carbon dot–a naked eye sensor for toxic Pb2+ ions | |
| Cai et al. | Analysis of environmental nanoplastics: Progress and challenges | |
| Montaño et al. | Single Particle ICP-MS: Advances toward routine analysis of nanomaterials | |
| Levermore et al. | Detection of microplastics in ambient particulate matter using Raman spectral imaging and chemometric analysis | |
| Laborda et al. | Single particle inductively coupled plasma mass spectrometry for the analysis of inorganic engineered nanoparticles in environmental samples | |
| Nguyen et al. | Spectroscopic analysis of microplastic contaminants in an urban wastewater treatment plant from Seoul, South Korea | |
| CN102608279A (en) | Method for analyzing and detecting nano titanium dioxide in food | |
| CN102914535A (en) | Method for separating and detecting nano silica in food | |
| JP6113908B2 (en) | Molecular detection apparatus and method | |
| WO2017016281A1 (en) | Method of detecting target molecule concentration | |
| Luo et al. | Measurement and characterization of engineered titanium dioxide nanoparticles in the environment | |
| CN103115913A (en) | Preparation method of magnetic surface enhanced Raman spectrum substrate | |
| Tian et al. | Simultaneous multi-element and multi-isotope detection in single-particle ICP-MS analysis: Principles and applications | |
| CN104964942A (en) | Visualization method for rapidly detecting trace amount of uranyl ions in water environment | |
| Qureashi et al. | Biomass-derived carbon quantum dots: a novel and sustainable fluorescent “ON–OFF–ON” sensor for ferric ions | |
| Kaur et al. | Synthesis of highly fluorescent carbon dots from spices for determination of sunset yellow in beverages | |
| Kim et al. | Nanometrology and its perspectives in environmental research | |
| Mattsson et al. | Monitoring anthropogenic particles in the environment: Recent developments and remaining challenges at the forefront of analytical methods | |
| Gonzalez de Vega et al. | Analysis of Ti-and Pb-based particles in the aqueous environment of Melbourne (Australia) via single particle ICP-MS | |
| Dou et al. | Au nanoparticles/ZnO nanorods as SALDI-MS substrate for on-plate enrichment and detection of glutathione in real samples | |
| Noireaux et al. | Titanium dioxide nanoparticles in food: comparison of detection by triple-quadrupole and high-resolution ICP-MS in single-particle mode | |
| Enyoh et al. | New analytical approaches for effective quantification and identification of nanoplastics in environmental samples | |
| Meng et al. | Single Particle Inductively Coupled Plasma Time-of-Flight Mass Spectrometry—A Powerful Tool for the Analysis of Nanoparticles in the Environment | |
| US20100031734A1 (en) | Method and system for detecting impurities in liquids |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120725 |