CN104198513A - Quick determination method for cadmium element in grains with X-ray fluorescent spectrometry - Google Patents
Quick determination method for cadmium element in grains with X-ray fluorescent spectrometry Download PDFInfo
- Publication number
- CN104198513A CN104198513A CN201410462090.6A CN201410462090A CN104198513A CN 104198513 A CN104198513 A CN 104198513A CN 201410462090 A CN201410462090 A CN 201410462090A CN 104198513 A CN104198513 A CN 104198513A
- Authority
- CN
- China
- Prior art keywords
- sample
- cereal
- standard
- assay methods
- cadmium element
- 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
Landscapes
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a quick determination method for cadmium element in grains with X-ray fluorescent spectrometry. The quick determination method comprises the following steps: step one, manufacturing the standard curve of a standard sample: sieving a series of cadmium grain powder with standard content gradient, and loading in a sample cup and ramming; scanning the series of standard samples on an instrument, obtaining the X-ray fluorescence intensity of the standard sample with known content, and calibrating the standard curve; step two, treating the sample to be detected: taking a quantitative amount of grains for removing peels, crashing and sieving; taking the powder with the same amount as that in the step one, loading in the sample cup and ramming to form a sample to be detected; testing on the instrument, calculating the content. The present detection precision and repeatability can be optimized, so that high accuracy, good regularity and good uniformity of test results are guaranteed; meanwhile, the treatment method is simple, the sample is smashed, sieved and treated by using a hammer type cyclone mill, the time is short, only 2 min is needed before the sample is treated, the instrument test is simple, and no consume material is wasted environment-friendly without an instrument through one-key operation.
Description
Technical field
The present invention relates to food security, specifically, relate to a kind of cereal determining heavy metals method.
Background technology
Along with the economic fast development of China, due to many-sided reason, cause national economy guiding more to focus on digital economy, thereby caused a large amount of problems, and food-safety problem is also day by day serious.Although there is being achievement in country more aspect fast economic growth, but because causing domestic physical environment, extensive economy policy in the past sharply worsens, atmospheric pollution, water pollution, soil pollution are also to a very serious degree, China have the proverb of " bread is the staff of life ", soil is the important foundation of food sources, day by day serious along with soil pollution, the cereal growing from soil is also inevitably with all kinds of pollution elements, and wherein heavy metal pollution becomes particularly distinct issues.
Heavy metal extensively distributes in atmosphere, water body, soil, biosome, heavy metal can not be biodegradable, but there is bioaccumulation, can directly threaten higher organism to comprise the mankind, relevant expert points out, heavy metal has irreversibility to the pollution of soil, and polluted soil is not administered value, can only adjust varieties of plant and be avoided.Therefore, heavy metal pollution problem is subject to people's attention day by day.Heavy metal can be absorbed by contaminated cereal, and then enters human body, and heavy metal is very big to the injury of human body.Common are: mercury: eat the rear liver that directly sinks to, brain, nerve, eyesight are destroyed greatly.In the every premium on currency of natural water, containing 0.01 milligram, will cause people poisoning; Cadmium: cause hypertension, cause cardiovascular and cerebrovascular disease; Destroy bone and liver kidney, and cause kidney failure; Plumbous: to be the one that heavy metal pollution Poisoning is larger, will to be difficult to get rid of once enter human body.Directly the nervous system of the brain cell, particularly fetus of harm people, can cause congenital feeblemindedness; Cobalt: can have radioactive damage to skin; Vanadium: the heart, the lung of hurting sb.'s feelings, cause cholesterol metabolism abnormity; Antimony: to make silver-colored jewelry become brick-red with arsenic, and skin is had to radioactive damage; Thallium: can make people's polyneuritis; Manganese: can make human thyroid hyperfunction when excess.Also can injure vitals; Arsenic: be one of component of arsenic, have severe toxicity, can cause people dead rapidly.Long Term Contact is a small amount of, can cause slow poisoning.Also has in addition carcinogenicity; Any headache, dizziness, insomnia, forgetful, refreshing smart entanglement, arthralgia, calculus, cancer that can cause people in these heavy metals.Therefore, particularly important to the detection of food content of beary metal.
Conventionally the Analysis of Heavy Metal method of accreditation has: ultraviolet can spectrophotometric method (UV), atomic absorption method (AAS), atomic fluorescence method (AFS), inductively coupled plasma method (ICP), X-fluorescence spectrum (XRF), inductively coupled plasma mass spectroscopy (ICP-MS).In addition to the above methods, more introduce spectroscopic methodology and detect, precision is higher, more accurate.
GB belongs to chemical detection method substantially for the detection of Cd element in rice, need carry out acid treatment to sample, disposal route generally adopts ashing method, Microwave Digestion, Wet method etc., complex operation, use strong acid simultaneously, have a large amount of acid gas to produce, the whole sample preparation time is long, at least 2 hours, wastes time and energy.Technology also has the X-fluorescence spectrum of employing (XRF) analysis at present, advantage is Non-Destructive Testing, can Direct Analysis finished product, but current accuracy of detection and repeatability are not as spectroscopic methodology, are therefore necessary the detection method of X-fluorescence spectrum to improve to obtain more accurate test result.
Summary of the invention
In view of this, need to overcome at least one in above-mentioned defect of the prior art.The invention provides the rapid assay methods of a kind of X-fluorescence spectroscopic methodology to cadmium element in cereal, comprising:
Step 1, standard model standard curve making: by a series of cadmium cereal powder that have standard content gradient, cross respectively mesh sieve, pack sample cup compacting into;
By machine scanning on series standard sample, obtain the X-fluorescence intensity of known content standard sample, demarcate typical curve;
Step 2, testing sample processing: get a certain amount of grain husking, pulverized mesh sieve; The powder system of getting itself and step 1 moderate packs sample cup compacting into, forms the testing sample that is applicable to X-fluorescence test;
Examination with computer, carries out cubage, extracts the Cd intensity of unknown sample, and instrument software utilizes the linear formula of intensity and content to calculate the content of Cd.
By making the typical curve that uses mesh sieve or other uniform powder preparation standard samples, it is more accurate than the precision that only uses powder to obtain to make at the typical curve of production standard sample, thereby the high precision of having measured after having ensured, and the testing sample powder that testing sample uses mesh sieve to obtain also can ensure the high precision of test, the simple irregular and unevenness that uses general powder to be still difficult to avoid test, makes test result have larger randomness.
According to the present invention in background technology to described in prior art, also have the X-fluorescence spectrum of employing (XRF) analysis, advantage is Non-Destructive Testing, can Direct Analysis finished product, but current accuracy of detection and repeatability are not as spectroscopic methodology; And the rapid assay methods of X-fluorescence spectroscopic methodology provided by the invention to cadmium element in cereal, can optimize current accuracy of detection and repeatability by standard method, systematicness and good homogeneity that the high precision of test result is become reconciled are ensured, also there is disposal route simple simultaneously, only use hammer Cyclone mill to pulverize and sieve processing to sample, the time is short, and sample pre-treatments only needs 2min, instrument test is simple, a keyization operation can and without instrument environmental protection without any waste consumable.
In addition, according to X-fluorescence spectroscopic methodology disclosed by the invention, the rapid assay methods of cadmium element in cereal is also had to following additional technical feature:
Further, in step 1, the order number of described mesh sieve is more than or equal to 40 orders.
Use mesh sieve one can make powdered sample particle to be measured more even, two can make the powdered sample of certain granules size be left out, generally, that the powder particle that size is greater than to certain specific dimensions forecloses, with the rule contrast standard specimen of production standard curve, the regularity of the cadmium element test in guarantee powdered sample and repeated, in fact, homogeneity and the consistance of contrast standard specimen have larger impact to test result, and the size of particle also exists considerable influence to test result accuracy.
Further, in step 1, mensuration formula is:
C=bI+a；
Wherein C represents testing sample content, and I represents the X-fluorescence intensity of testing sample;
Wherein equation of linear regression is:
。
Utilize the test philosophy of X-fluorescence spectrometer, the content of Cd is directly proportional to the X-fluorescence intensity of obtaining after the Cd exciting.Obtain after the X-fluorescence intensity of known content, just can produce the test curve of an intensity and content.When test unknown sample, by obtaining the X-fluorescence intensity of unknown sample, thereby calculate its corresponding content.
Further, in step 2, described in the powder dose that packs in sample cup be less than 1/5 with the ratio of described quantitative cereal.
After crossing mesh sieve, powder is mixed fully, ensures sample homogeneity; Ensure the granularity of sample simultaneously, reduce the granularity effect of X-fluorescence test, and get wherein certain proportion part, can ensure better repeatability and the precision of test.
Further, the powder dose packing into described in sample cup is 1/10 with the ratio of described quantitative cereal.
Further, described quantitative cereal is 50 grams.
Further, the powder dose packing into described in sample cup is 5 grams.
Further, described cereal is rice or wheat or corn.
Further, in step 1, the quantity of described standard model is more than or equal to 4.
The aspect that the present invention is additional and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Brief description of the drawings
Above-mentioned and/or additional aspect of the present invention and advantage will become obviously and easily from the following description of the accompanying drawings of embodiments to be understood, wherein:
Fig. 1 process flow diagram of the present invention.
Embodiment
Embodiment described below is exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Describe below with reference to accompanying drawings the rapid assay methods of X-fluorescence spectroscopic methodology of the present invention to cadmium element in cereal, wherein Fig. 1 is process flow diagram of the present invention.
According to embodiments of the invention, as shown in Figure 1, the rapid assay methods of X-fluorescence spectroscopic methodology provided by the invention to cadmium element in cereal, comprising:
Step 1, standard model standard curve making: by a series of cadmium cereal powder that have standard content gradient, cross respectively mesh sieve, pack sample cup compacting into;
By machine scanning on series standard sample, obtain the X-fluorescence intensity of known content standard sample, demarcate typical curve;
Step 2, testing sample processing: get a certain amount of grain husking, pulverized mesh sieve; The powder system of getting itself and step 1 moderate packs sample cup compacting into, forms testing sample;
Examination with computer, carries out cubage.
According to the present invention in background technology to described in prior art, also have the X-fluorescence spectrum of employing (XRF) analysis, advantage is Non-Destructive Testing, can Direct Analysis finished product, but current accuracy of detection and repeatability are not as spectroscopic methodology; And the rapid assay methods of X-fluorescence spectroscopic methodology provided by the invention to cadmium element in cereal, can optimize current accuracy of detection and repeatability by standard method, systematicness and good homogeneity that the high precision of test result is become reconciled are ensured, also there is disposal route simple simultaneously, only use hammer Cyclone mill to pulverize and sieve processing to sample, the time is short, and sample pre-treatments only needs 2min, instrument test is simple, a keyization operation can and without instrument environmental protection without any waste consumable.
According to some embodiments of the present invention, in step 1, the order number of described mesh sieve is more than or equal to 40 orders.
According to embodiments of the invention, in step 1, mensuration formula is:
C=bI+a；
Wherein C represents testing sample content, and I represents the X-fluorescence intensity of testing sample;
Wherein equation of linear regression is:
。
According to some embodiments of the present invention, in step 2, described in the powder dose that packs in sample cup be less than 1/5 with the ratio of described quantitative cereal.
Preferably, the powder dose packing into described in sample cup is 1/10 with the ratio of described quantitative cereal.
Alternatively, described quantitative cereal is 50 grams.
Alternatively, the powder dose packing into described in sample cup is 5 grams.
According to some embodiments of the present invention, described cereal is rice or wheat or corn.
According to some embodiments of the present invention, in step 1, the quantity of described standard model is more than or equal to 4.
According to one embodiment of present invention, concrete steps and data are as follows:
Take a series of about 5g of cadmium rice powder-like (needing 40 mesh sieves) that have concentration gradients, pack sample cup into, and use sample lid by rice sample compacting, with the standard model of production standard curve;
Machine on series standard sample is swept to spectrum, obtain the X-fluorescence intensity of known content standard sample, staking-out work curve, according to above-mentioned formula production standard curve;
Get 50g rice sample, remove the peel, pulverized 40 mesh sieves, ensure sample homogeneity; Ensure the granularity of sample simultaneously, reduce the granularity effect of X-fluorescence test;
Take the rice powdered sample after 5g pulverizes, pack sample cup into, and use sample lid by rice sample compacting, preparation becomes the powdered sample to be measured that is applicable to X-fluorescence test;
Examination with computer, cubage, the Cd intensity of extraction unknown sample, instrument software utilizes the linear formula of intensity and content to calculate the content of Cd.
Although the specific embodiment of the present invention is described in detail with reference to multiple illustrative examples of the present invention, but it must be understood that, those skilled in the art can design multiple other improvement and embodiment, and these improve and within embodiment will drop on spirit and scope.Particularly, within the scope of aforementioned open, accompanying drawing and claim, can aspect the layout of parts and/or subordinate composite configuration, make rational modification and improvement, and can not depart from spirit of the present invention.Except modification and the improvement of parts and/or layout aspect, its scope is limited by claims and equivalent thereof.
Claims (9)
1. the rapid assay methods of X-fluorescence spectroscopic methodology to cadmium element in cereal, is characterized in that, comprising:
Step 1, standard model standard curve making: by a series of cadmium cereal powder that have standard content gradient, cross respectively mesh sieve, pack sample cup compacting into;
By machine scanning on series standard sample, obtain the X-fluorescence intensity of known content standard sample, demarcate typical curve;
Step 2, testing sample processing: get a certain amount of grain husking, pulverized mesh sieve; The powder system of getting itself and step 1 moderate packs sample cup compacting into, forms testing sample;
Examination with computer, carries out cubage.
2. the rapid assay methods of X-fluorescence spectroscopic methodology according to claim 1 to cadmium element in cereal, is characterized in that, in step 1, the order number of described mesh sieve is more than or equal to 40 orders.
3. the rapid assay methods of X-fluorescence spectroscopic methodology according to claim 1 to cadmium element in cereal, is characterized in that, in step 1, mensuration formula is:
C=bI+a；
Wherein C represents testing sample content, and I represents the X-fluorescence intensity of testing sample;
Wherein equation of linear regression is:
。
4. the rapid assay methods of X-fluorescence spectroscopic methodology according to claim 1 to cadmium element in cereal, is characterized in that, in step 2, described in the powder dose that packs in sample cup be less than 1/5 with the ratio of described quantitative cereal.
5. the rapid assay methods of X-fluorescence spectroscopic methodology according to claim 4 to cadmium element in cereal, is characterized in that, described in the powder dose that packs in sample cup be 1/10 with the ratio of described quantitative cereal.
6. the rapid assay methods of X-fluorescence spectroscopic methodology according to claim 5 to cadmium element in cereal, is characterized in that, described quantitative cereal is 50 grams.
7. the rapid assay methods of X-fluorescence spectroscopic methodology according to claim 5 to cadmium element in cereal, is characterized in that, described in the powder dose that packs in sample cup be 5 grams.
8. the rapid assay methods of X-fluorescence spectroscopic methodology according to claim 1 to cadmium element in cereal, is characterized in that, described cereal is rice or wheat or corn.
9. the rapid assay methods of X-fluorescence spectroscopic methodology according to claim 1 to cadmium element in cereal, is characterized in that, in step 1, the quantity of described standard model is more than or equal to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410462090.6A CN104198513A (en) | 2014-09-12 | 2014-09-12 | Quick determination method for cadmium element in grains with X-ray fluorescent spectrometry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410462090.6A CN104198513A (en) | 2014-09-12 | 2014-09-12 | Quick determination method for cadmium element in grains with X-ray fluorescent spectrometry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104198513A true CN104198513A (en) | 2014-12-10 |
Family
ID=52083838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410462090.6A Pending CN104198513A (en) | 2014-09-12 | 2014-09-12 | Quick determination method for cadmium element in grains with X-ray fluorescent spectrometry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104198513A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807844A (en) * | 2015-04-18 | 2015-07-29 | 湖南省粮油产品质量监测中心 | Method for rapidly screening and detecting cadmium content in rice and rice products |
| CN105021640A (en) * | 2015-06-03 | 2015-11-04 | 江苏天瑞仪器股份有限公司 | Rapid X-ray fluorescence spectrometric determination method for elemental selenium in cereals |
| CN105866156A (en) * | 2016-04-22 | 2016-08-17 | 苏州三值精密仪器有限公司 | Method for quickly determining trace elements in salt with X-ray fluorescence spectrometry |
| CN106153656A (en) * | 2016-08-31 | 2016-11-23 | 江苏天瑞仪器股份有限公司 | A kind of X fluorescence spectrum method rapid assay methods to heavy metal in soil cadmium element |
| CN108872283A (en) * | 2018-09-11 | 2018-11-23 | 中国科学院寒区旱区环境与工程研究所 | Using the method for wavelength dispersion X-ray fluorescence spectrometer measurement plant sample |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5690247A (en) * | 1979-12-25 | 1981-07-22 | Central Glass Co Ltd | Preparation of sample for x-ray analysis |
| JPS6468646A (en) * | 1987-09-09 | 1989-03-14 | Ngk Insulators Ltd | Pretreatment of sample for fluorescent x-ray analysis |
| JPH08247970A (en) * | 1995-03-15 | 1996-09-27 | Nippon Steel Corp | Measuring method of coating quantity of anneal releasing agent on grain-oriented magnetic steel sheet |
| JPH10123071A (en) * | 1996-08-27 | 1998-05-15 | Rigaku Ind Co | Method and equipment for x ray analysis |
| CN101520421A (en) * | 2009-04-08 | 2009-09-02 | 北京农产品质量检测与农田环境监测技术研究中心 | Modeling method of soil heavy metal content detection model and application thereof |
| JP2013050683A (en) * | 2011-08-31 | 2013-03-14 | Fujifilm Corp | Lens drive device |
| CN103645201A (en) * | 2013-12-13 | 2014-03-19 | 彭新凯 | Method for rapidly detecting heavy metal cadmium in rice based on X-ray fluorescence |
| CN103674982A (en) * | 2013-12-10 | 2014-03-26 | 上海市建筑科学研究院(集团)有限公司 | Method for determining heavy metal content in building materials by applying X-fluorescence melting method |
| CN104374790A (en) * | 2014-11-25 | 2015-02-25 | 上海交通大学 | XRF (X-ray fluorescence spectrometry) method for rapidly detecting aluminum content in fried foods |
-
2014
- 2014-09-12 CN CN201410462090.6A patent/CN104198513A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5690247A (en) * | 1979-12-25 | 1981-07-22 | Central Glass Co Ltd | Preparation of sample for x-ray analysis |
| JPS6468646A (en) * | 1987-09-09 | 1989-03-14 | Ngk Insulators Ltd | Pretreatment of sample for fluorescent x-ray analysis |
| JPH08247970A (en) * | 1995-03-15 | 1996-09-27 | Nippon Steel Corp | Measuring method of coating quantity of anneal releasing agent on grain-oriented magnetic steel sheet |
| JPH10123071A (en) * | 1996-08-27 | 1998-05-15 | Rigaku Ind Co | Method and equipment for x ray analysis |
| CN101520421A (en) * | 2009-04-08 | 2009-09-02 | 北京农产品质量检测与农田环境监测技术研究中心 | Modeling method of soil heavy metal content detection model and application thereof |
| JP2013050683A (en) * | 2011-08-31 | 2013-03-14 | Fujifilm Corp | Lens drive device |
| CN103674982A (en) * | 2013-12-10 | 2014-03-26 | 上海市建筑科学研究院(集团)有限公司 | Method for determining heavy metal content in building materials by applying X-fluorescence melting method |
| CN103645201A (en) * | 2013-12-13 | 2014-03-19 | 彭新凯 | Method for rapidly detecting heavy metal cadmium in rice based on X-ray fluorescence |
| CN104374790A (en) * | 2014-11-25 | 2015-02-25 | 上海交通大学 | XRF (X-ray fluorescence spectrometry) method for rapidly detecting aluminum content in fried foods |
Non-Patent Citations (2)
| Title |
|---|
| 廖学亮等: "台式能量色散X 射线荧光光谱直接检测大米中的镉", 《食品科学》 * |
| 梅燕等: "Ｘ 射线荧光光谱压片法测定六种花瓣粉末的成分", 《光谱学与光谱分析》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807844A (en) * | 2015-04-18 | 2015-07-29 | 湖南省粮油产品质量监测中心 | Method for rapidly screening and detecting cadmium content in rice and rice products |
| CN105021640A (en) * | 2015-06-03 | 2015-11-04 | 江苏天瑞仪器股份有限公司 | Rapid X-ray fluorescence spectrometric determination method for elemental selenium in cereals |
| CN105866156A (en) * | 2016-04-22 | 2016-08-17 | 苏州三值精密仪器有限公司 | Method for quickly determining trace elements in salt with X-ray fluorescence spectrometry |
| CN106153656A (en) * | 2016-08-31 | 2016-11-23 | 江苏天瑞仪器股份有限公司 | A kind of X fluorescence spectrum method rapid assay methods to heavy metal in soil cadmium element |
| CN108872283A (en) * | 2018-09-11 | 2018-11-23 | 中国科学院寒区旱区环境与工程研究所 | Using the method for wavelength dispersion X-ray fluorescence spectrometer measurement plant sample |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Byers et al. | XRF techniques to quantify heavy metals in vegetables at low detection limits | |
| Li et al. | Effects of aging on the fraction distribution and bioavailability of selenium in three different soils | |
| CN104198513A (en) | Quick determination method for cadmium element in grains with X-ray fluorescent spectrometry | |
| Andrade et al. | Comparison of ICP OES and LIBS analysis of medicinal herbs rich in flavonoids from Eastern Europe | |
| CN104181182A (en) | Method for rapidly measuring arsenic element in grain by X fluorescent spectrometry | |
| Jamali et al. | A multivariate study: Variation in uptake of trace and toxic elements by various varieties of Sorghum bicolor L. | |
| CN105021640A (en) | Rapid X-ray fluorescence spectrometric determination method for elemental selenium in cereals | |
| CN104034689A (en) | Method and device for detecting heavy metal content of soil on basis of tabletting method | |
| Li et al. | Analytical methodologies for agrometallomics: a critical review | |
| Zhuang et al. | Combining HPLC–DAD and ICP-MS data for improved analysis of complex samples: Classification of the root samples from Cortex moutan | |
| Zhou et al. | Prediction of cadmium concentration in brown rice before harvest by hyperspectral remote sensing | |
| Liang et al. | Rapid discrimination of Salvia miltiorrhiza according to their geographical regions by laser induced breakdown spectroscopy (LIBS) and particle swarm optimization-kernel extreme learning machine (PSO-KELM) | |
| Espinoza-Quiñones et al. | Application of high resolution X-ray emission spectroscopy on the study of Cr ion adsorption by activated carbon | |
| JP5666070B1 (en) | Sample pretreatment method for measuring the amount of harmful elements in crop samples | |
| Liu et al. | Quantitative analysis of cadmium in tobacco roots using laser-induced breakdown spectroscopy with variable index and chemometrics | |
| CN104181183A (en) | Method for rapidly measuring lead element in grain by X fluorescent spectrometry | |
| Silva et al. | Determination of bromine and iodine in edible flours by inductively coupled plasma mass spectrometry after microwave-induced combustion | |
| CN102519930A (en) | Method for rapidly determining selenium content in plant sample | |
| Capobianco et al. | The use of micro-energy dispersive X-ray fluorescence spectrometry combined with a multivariate approach to determine element variation and distribution in tobacco seedlings exposed to arsenate | |
| Srinuttrakul et al. | Elemental analysis of brown rice by inductively coupled plasma atomic emission spectrometry and instrumental neutron activation analysis | |
| Zhao et al. | Laser-induced breakdown spectroscopy (LIBS) for the detection of exogenous contamination of metal elements in lily bulbs | |
| Wang et al. | Multielement Principal Component Analysis and Origin Traceability of Rice Based on ICP‐MS/MS | |
| Zhang et al. | Occurrence, distribution, and associations of essential and non-essential elements in the medicinal and edible fungus “Fuling” from southern China | |
| Zhou et al. | Elemental analysis of solid food materials using a reliable laser ablation inductively coupled plasma mass spectrometry method | |
| CN104198665A (en) | Method for rapidly determining cadmium in cereal crops |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141210 |
|
| RJ01 | Rejection of invention patent application after publication |