CN103196908B - The analyzing detecting method of calper calcium peroxide in a kind of wheat flour - Google Patents
The analyzing detecting method of calper calcium peroxide in a kind of wheat flour Download PDFInfo
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Abstract
The present invention relates to field of food safety, disclose the analyzing detecting method of calper calcium peroxide in a kind of wheat flour, whether analyzed in wheat flour sample containing calper calcium peroxide by multiple Combination of Methods.It is all aobvious neutral that potential of hydrogen differentiates screening strength wheat flour pH test result, adds all aobvious alkalescence of wheat flour of 0.05% calper calcium peroxide.Luminol chemiluminescence is analyzed in wheat flour then luminous containing calper calcium peroxide, otherwise not luminous, is combined, gets rid of other superoxide with above-mentioned experiment.XRF full elemental analysis measures sample wheat flour ash content, and in conjunction with above-mentioned two experiments, calcium constituent is that unique major component is then pointed out in sample containing calper calcium peroxide.In conjunction with above three experimental results, X ray crystal diffraction measures sample wheat flour ash content, when sample be added with 0.05% calper calcium peroxide wheat flour ash content three strongest ones line d value with peak by force than time identical or close in error range, then contain calper calcium peroxide in proof sample.The present invention can easy fast, accurately and effectively resolved analysis to go out in wheat flour whether containing calper calcium peroxide.
Description
Technical field
The present invention relates to field of food safety, particularly the analyzing detecting method of calper calcium peroxide in a kind of wheat flour.
Background technology
Wheat is the second largest grain variety that China is only second to paddy, and output accounts for 22% of total output of grain, and sown area accounts for 25% of the total sown area of grain.Wheat flour (being commonly called as flour) face is the powder that wheat grinds, and is the main processed goods of wheat, occupies very large proportion in the dietary structure of people, can be made into the traditional food that steamed bun, noodles, steamed stuffed bun, dumpling etc. are liked by broad masses deeply.The quality of flour quality directly can have influence on the quality of downstream wheaten food, and be also related to physical and mental health and the economic interests of consumer, be one of food security hot issue of current public attention simultaneously.
In February, 2011, department of the Ministry of Public Health etc. 6 combined in " bulletin (2011 No. 4) about cancelling food additives benzoyl peroxide, calper calcium peroxide " of issue and expressly provides: from 1 day May in 2011, forbid in Flour production, add benzoyl peroxide, calper calcium peroxide, food additive companies must not produce and sell food additives benzoyl peroxide, calper calcium peroxide; About in flour (wheat flour), the food standard content of permission interpolation benzoyl peroxide, calper calcium peroxide is abrogated voluntarily, this also means that bleaching agent for flour is formally stopped using in China.Namely the present invention is research object with calper calcium peroxide, studies it and there is situation in wheat flour.Be 500mg/kg(that is 0.05% according to maximum the uses limitation allowing to add calper calcium peroxide in wheat flour in the past), set sxemiquantitative limit value.The present invention, carrying out calper calcium peroxide fully qualitatively simultaneously, also can carry out semi-quantitative analysis to it.
Summary of the invention
The object of the invention is: for solving above-mentioned technical matters of the prior art, provide the analyzing detecting method of calper calcium peroxide in a kind of wheat flour.
Whether for achieving the above object, the technical solution used in the present invention is: the analyzing detecting method providing calper calcium peroxide in a kind of wheat flour, is characterized in that, used analyze in wheat flour sample containing calper calcium peroxide by multiple Combination of Methods; Described method relates to: potential of hydrogen differentiates screening, luminol chemiluminescence, ash content XRF full elemental analysis (XRF) and ash content X ray crystal diffraction (XRD), and four steps all use wheat flour former state below.
The first step: potential of hydrogen differentiates screening, takes wheat flour sample, add water stir and centrifugal after, require different according to test precision, choice for use accurate pH test paper, phenolphthalein reagent or pH meter can carry out potential of hydrogen test;
If add the aobvious pink of phenolphthalein, illustrate in wheat flour aqueous solution and may contain calper calcium peroxide, and content is not less than 0.05%; Other illegally add material may to there are talcum powder, chalk powder or gesso etc. in nondiscolouring explanation wheat flour aqueous solution;
Potential of hydrogen differentiate screening be for calper calcium peroxide aqueous solution in alkalescence, and wheat flour is in neutral feature, by measuring wheat flour potential of hydrogen to be analyzed, whether as accurate pH test paper, pH meter measures and phenolphthalein discoloration test measures, differentiate fast wherein containing calper calcium peroxide.
Second step: luminol chemiluminescence is tested, and adds wheat flour sample, add water and make it become semifluid thick-pasty in beaker; Add watery hydrochloric acid again; 2-3 adds alkali lye rapidly after second, stirs; Add luminol reagent, then add catalyzer-potassium ferricyanide pressed powder, immediately whole chemiluminescence reaction system is placed in darkroom, observes while stirring;
If the wheat flour sample local in beaker starts namely have indistinct blue-fluorescence to occur, the follow-up increasing along with the amplitude of stirring, whole beaker all presents blueness, then wherein containing calper calcium peroxide; If do not produce chemiluminescence, and in conjunction with first step experiment, the not aobvious alkalescence of its potential of hydrogen, then illustrate in wheat flour sample not containing calper calcium peroxide;
Described luminol chemiluminescence produces hydrogen peroxide for calper calcium peroxide by chemical reaction, the latter produces the feature of chemiluminescence effect with luminol again, after wheat flour sample being mixed with the solution of certain concentration, differentiate wherein whether containing calper calcium peroxide fast by the process controlling luminol chemiluminescence reaction;
Described potential of hydrogen is differentiated screening method and is combined tentatively to determine whether contain calper calcium peroxide in sample with described luminol chemiluminescence method.
3rd step: ash content XRF full elemental analysis (XRF), wheat flour sample, after calcination ashing, mixes according to weight ratio 1:1 ratio with cellulose, tabletted on sheeter, uses Xray fluorescence spectrometer to measure;
If compared with forming with the full element of wheat flour ash content, the percentage composition of K, P and Mg slightly reduces, and the content of Ca significantly increases, in conjunction with the first step and second step experimental result, can judge containing calper calcium peroxide in sample, and content is not less than 0.05%;
Whether described ash content XRF full elemental analysis XRF forms for the element of calper calcium peroxide, by will its element of XRF technical Analysis be utilized after the low temperature dry ashing of wheat flour sample to form, differentiate fast wherein containing calper calcium peroxide.
4th step: ash content X ray crystal diffraction (XRD), wheat flour sample is after calcination ashing, and ash content is tabletted on reeded slide, uses x-ray powder diffraction instrument to measure;
Because calper calcium peroxide calcination ashing products therefrom is CaO, the display of its XRD spectra respectively at 32 °, 2 θ angle, there is three strongest ones' line in 37.5 °, 54 ° three positions; If there is three strongest ones' line equally in these three positions in the XRD spectra of sample ash content, when in error allowed band, its X-ray diffraction peak d value and peak are by force than (I%) and CaO identical or close, then both prompting, contained material has identical structure, should be same substance; In conjunction with the experiment of other three steps, can finally be judged in wheat flour sample containing calper calcium peroxide by XRD test.
Whether during detection, above-mentioned four steps can sequentially detect in no particular order, but need comprehensively above-mentioned four steps fully to judge in wheat flour to be measured containing calper calcium peroxide when analyzing.
Wherein, in described second step, after wheat flour sample adds water, become semifluid thick-pasty, be conducive to the control of experiment process.After acid adding release active oxygen, add rapidly alkali lye and make reaction environment meta-alkalescence to be conducive to the generation of luminol reaction.
Wherein, in described 3rd step and the 4th step, wheat flour sample calcination temperature is: 550 DEG C, and calcination time is: 4h.
Wherein, described process condition experiment condition: sweep limit 2 θ angle is 5 ° ~ 60 °, sampling step wide is 0.02 °/step, and sweep velocity is 4 °/min.
The invention has the beneficial effects as follows: the multiple method of integrated application of the present invention, can easy fast, accurately and effectively resolved analysis to go out in wheat flour whether containing calper calcium peroxide.Wherein, differentiate screening method by potential of hydrogen, the pH test result of wheat flour is all aobvious neutral, and all aobvious alkalescence of the wheat flour adding 0.05% calper calcium peroxide; By luminol chemiluminescence method, then luminous containing calper calcium peroxide in wheat flour, otherwise not luminous, being combined by differentiating screening method with potential of hydrogen, other superoxide can be got rid of; XRF method measures sample wheat flour ash content, and in conjunction with above-mentioned two kinds of methods, the impact of removing wheat flour ash content background, if calcium constituent is unique major component, points out in sample containing calper calcium peroxide; XRD method measures sample wheat flour ash content, when sample is identical with I% or close in error range with the d value being added with 0.05% calper calcium peroxide wheat flour ash content three strongest ones line, can confirms containing calper calcium peroxide in sample, and can carry out corresponding semiquantitative determination.
Accompanying drawing explanation
Fig. 1 is the experiment schematic diagram that potential of hydrogen of the present invention differentiates screening method.
Fig. 2 is wheat flour ash content XRF full elemental analysis figure of the present invention.
Fig. 3 of the present inventionly contains 0.05% calper calcium peroxide wheat flour ash content XRF full elemental analysis figure.
Fig. 4 is wheat flour ash content X ray crystallographic analysis spectrogram of the present invention.
Fig. 5 is calper calcium peroxide ashing product X ray crystallographic analysis spectrogram of the present invention.
Fig. 6 of the present inventionly contains 0.05% calper calcium peroxide wheat flour ash content X ray crystallographic analysis spectrogram.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
Whether in a kind of wheat flour of the present invention, the analyzing detecting method of calper calcium peroxide, is characterized in that, used analyze in wheat flour sample containing calper calcium peroxide by multiple Combination of Methods; Described method relates to: potential of hydrogen differentiates screening, luminol chemiluminescence, ash content XRF full elemental analysis (XRF) and ash content X ray crystal diffraction (XRD), and four steps all use wheat flour former state below.
The first step: potential of hydrogen differentiates screening, takes wheat flour sample, add water stir and centrifugal after, require different according to test precision, choice for use accurate pH test paper, phenolphthalein reagent or pH meter can carry out potential of hydrogen test;
If add the aobvious pink of phenolphthalein, illustrate in wheat flour aqueous solution and may contain calper calcium peroxide, and content is not less than 0.05%; Other illegally add material may to there are talcum powder, chalk powder or gesso etc. in nondiscolouring explanation wheat flour aqueous solution;
Potential of hydrogen differentiate screening be for calper calcium peroxide aqueous solution in alkalescence, and wheat flour is in neutral feature, by measuring wheat flour potential of hydrogen to be analyzed, whether as accurate pH test paper, pH meter measures and phenolphthalein discoloration test measures, differentiate fast wherein containing calper calcium peroxide.
Second step: luminol chemiluminescence is tested, and adds wheat flour sample, add water and make it become semifluid thick-pasty in beaker; Add watery hydrochloric acid again; 2-3 adds alkali lye rapidly after second, stirs; Add luminol reagent, then add catalyzer-potassium ferricyanide pressed powder, immediately whole chemiluminescence reaction system is placed in darkroom, observes while stirring;
If the wheat flour sample local in beaker starts namely have indistinct blue-fluorescence to occur, the follow-up increasing along with the amplitude of stirring, whole beaker all presents blueness, then wherein containing calper calcium peroxide; If do not produce chemiluminescence, and in conjunction with first step experiment, the not aobvious alkalescence of its potential of hydrogen, then illustrate in wheat flour sample not containing calper calcium peroxide;
Described luminol chemiluminescence produces hydrogen peroxide for calper calcium peroxide by chemical reaction, the latter produces the feature of chemiluminescence effect with luminol again, after wheat flour sample being mixed with the solution of certain concentration, differentiate wherein whether containing calper calcium peroxide fast by the process controlling luminol chemiluminescence reaction;
Described potential of hydrogen is differentiated screening method and is combined tentatively to determine whether contain calper calcium peroxide in sample with described luminol chemiluminescence method.
3rd step: ash content XRF full elemental analysis (XRF), wheat flour sample, after calcination ashing, mixes according to weight ratio 1:1 ratio with cellulose, tabletted on sheeter, uses Xray fluorescence spectrometer to measure;
If compared with forming with the full element of wheat flour ash content, the percentage composition of K, P and Mg slightly reduces, and the content of Ca significantly increases, in conjunction with the first step and second step experimental result, can judge containing calper calcium peroxide in sample, and content is not less than 0.05%;
Whether described ash content XRF full elemental analysis XRF forms for the element of calper calcium peroxide, by will its element of XRF technical Analysis be utilized after the low temperature dry ashing of wheat flour sample to form, differentiate fast wherein containing calper calcium peroxide.
4th step: ash content X ray crystal diffraction (XRD), wheat flour sample is after calcination ashing, and ash content is tabletted on reeded slide, uses x-ray powder diffraction instrument to measure;
Because calper calcium peroxide calcination ashing products therefrom is CaO, the display of its XRD spectra respectively at 32 °, 2 θ angle, there is three strongest ones' line in 37.5 °, 54 ° three positions; If there is three strongest ones' line equally in these three positions in the XRD spectra of sample ash content, when in error allowed band, its X-ray diffraction peak d value and peak are by force than (I%) and CaO identical or close, then both prompting, contained material has identical structure, should be same substance; In conjunction with the experiment of other three steps, can finally be judged in wheat flour sample containing calper calcium peroxide by XRD test.
Whether during detection, above-mentioned four steps can sequentially detect in no particular order, but need comprehensively above-mentioned four steps fully to judge in wheat flour to be measured containing calper calcium peroxide when analyzing.
Wherein, in described second step, after wheat flour sample adds water, become semifluid thick-pasty, be conducive to the control of experiment process.After acid adding release active oxygen, add rapidly alkali lye and make reaction environment meta-alkalescence to be conducive to the generation of luminol reaction.
Wherein, in described 3rd step and the 4th step, wheat flour sample calcination temperature is: 550 DEG C, and calcination time is: 4h.
Wherein, described process condition experiment condition: sweep limit 2 θ angle is 5 ° ~ 60 °, sampling step wide is 0.02 °/step, and sweep velocity is 4 °/min.
Embodiment 1:
The first step: take sample 5g, add water 200mL, stirs 10min, and use the test of precision test paper, phenolphthalein (0.1% ethanolic solution), test paper color development reads pH value, or whether observation phenolphthalein shows redness.PH electrode after correcting is inserted supernatant liquor, reading.
If add the aobvious pink of phenolphthalein, illustrate in wheat flour aqueous solution containing 0.05% calper calcium peroxide; Nondiscolouring illustrates that the potpourri potential of hydrogen of wheat flour and water is in neutral, and other illegally add material may to there are talcum powder, chalk powder or gesso etc.; Because talcous wheat flour pH value is about 8, add phenolphthalein reagent nondiscolouring, and calper calcium peroxide and the mixed pH of water 1:100 are about 12.0, than talcum powder, there is stronger alkalescence, so accurate pH test paper need be used to test further, if variable color, illustrate in wheat flour containing talcum powder.
In order to further by pH value of water solution in neutral doping chalk powder and the wheat flour of gesso differentiate and come, can by the two high temperature (1000 DEG C of 2h) calcination to decomposing, the complete ashing of wheat flour, rarely seen a small amount of additive transparent crystal or white powder particle in crucible, dissolved by residue, aqueous solution shows alkaline, and judgement may exist chalk powder again, aqueous solution shows neutral, and judgement may exist gesso.
When the aobvious alkalescence of wheat flour aqueous solution to be analyzed, may there is calper calcium peroxide, talcum powder in judgement, but talcum powder display is alkalescent, meet phenolphthalein reagent and do not develop the color, and calper calcium peroxide alkalescence is comparatively strong, and phenolphthalein can be made to manifest pink.Therefore wheat flour aqueous solution to be analyzed is aobvious neutral, and judgement may exist chalk powder, gesso, or does not add above-mentioned substance.When wheat flour sample is after high temperature sintering, occur without particulate powder material, infer in sample the illegal additive that do not adulterate.If there is particulate powder material to exist, may there is chalk powder in the judgement that aqueous solution shows alkalescence, and aqueous solution shows neutral judgement may exist gesso, as shown in Figure 1.
Second step: wheat flour sample sample 10g is put into beaker, add 50mL water to stir, add 1mL hydrochloric acid solution (1+3, v/v), gentle agitation is about 3s, add 2mL sodium hydroxide solution (20%) immediately, stir, add 3mL luminol solution, stir, beaker being put into from grinding proving installation, adding a small amount of potassium ferricyanide, stir and observe.
If namely the wheat flour sample local in beaker has indistinct blue-fluorescence to occur, the follow-up increasing along with the amplitude of stirring, whole beaker all presents blueness, then wherein containing 0.05% calper calcium peroxide; If do not produce chemiluminescence, then illustrate in wheat flour sample not containing calper calcium peroxide.
The critical control point detected is: be the formation condition that semifluid thick-pasty effectively controls active oxygen by the state of Control Assay, and then controls the process of luminol chemiluminescence reaction, finally reaches the object improving and observe sensitivity.Add the wheat flour of interpolation 0.05% calper calcium peroxide fully mixed in beaker, add a small amount of water and make it become semifluid thick-pasty.Add a small amount of watery hydrochloric acid again, this step is the calper calcium peroxide in order to discharge in sample, makes it that chemical reaction Hydrogen Peroxide occur in acid condition.2-3 adds rapidly certain alkali lye after second, and operating one is like this to stop above-mentioned chemical reaction, and two is for luminol reaction provides certain alkaline environment.Then stir.Sample can not be made above in whole process excessively rare, must remain semifluid thick-pasty, this mainly in order to have certain stick effect to the hydrogen peroxide generated, slowing down the speed of its release active oxygen, thus making experiment process controlled.
The potential of hydrogen experiment that the present invention combines above at this part Experiment can judge whether add calper calcium peroxide in wheat flour substantially.Take benzoyl peroxide as contrast, although it also has certain oxidisability, same luminol reaction can occur and produce chemiluminescence, it is water insoluble, and the wheat flour potential of hydrogen of adding benzoyl peroxide is neutral, adds phenolphthalein nondiscolouring.
3rd step: wheat flour sample is after 550 DEG C of calcinations ashing in 4 hours, and ash content and cellulose mix according to 1:1 ratio, tabletted on sheeter, uses and measures.
If the impact of this bottom element in removing wheat flour ash content, in sample ash content, the content of Ca significantly increases, and in conjunction with the experiment of potential of hydrogen resolved analysis and luminol chemiluminescence experiment, can contain calper calcium peroxide in preliminary judgement sample.
The ash content of what this experiment adopted is doping wheat flour additive but not former powder, mainly consider the matrix effect that can reduce wheat flour so first, reduce wheat flour to the impact of measurement result, second by wheat flour ashing, decrease its weight in the sample to which, add the ratio of additive, be equivalent to carry out certain enrichment to additive, be conducive to the raising of detection sensitivity.Whether this step can contain calper calcium peroxide in primitive decision wheat flour to be measured in conjunction with the first step and second step.
4th step: wheat flour sample is after 550 DEG C of calcinations ashing in 4 hours, and ash content is tabletted on reeded slide, uses x-ray powder diffraction instrument (DMAX-2200) to measure.Process condition experiment condition: sweep limit (2 θ) ° is 5 ° ~ 60 °, sampling step wide is 0.02 °/step, and sweep velocity is 4 °/min.
XRD determining is carried out to wheat flour ash content, find almost to occur without any the peak of high response, then with it for reference, determine the calper calcium peroxide product of ashing under ash content containing calper calcium peroxide wheat flour and similarity condition respectively, result shows: by three spectrogram contrasts, wheat flour ash content is as background, and response is less than 100, there is no chaff interference, very clean (see figure 4).Calper calcium peroxide 550 DEG C of ashing 4h products therefroms are CaO, the display of its XRD spectra respectively at 32 °, 2 θ angle, there is three strongest ones' line (see figure 5) in 37.5 °, 54 ° three positions.And three strongest ones' line (see figure 6) appears in ash content XRD spectra containing 0.05% calper calcium peroxide wheat flour equally in these three positions, and the two d value is identical with I% or close in error range, and the contained material of both promptings has identical structure, should be same substance.Whether the experiment of this step fully can judge wheat flour to be measured containing calper calcium peroxide from crystal structure angle in conjunction with the experiment of other three steps.
Above content is the further description done the present invention in conjunction with optimal technical scheme, can not assert that the concrete enforcement of invention is only limitted to these explanations.Concerning general technical staff of the technical field of the invention, under the prerequisite not departing from design of the present invention, simple deduction and replacement can also be made, all should be considered as protection scope of the present invention.
Claims (3)
1. whether the analyzing detecting method of calper calcium peroxide in wheat flour, is characterized in that, used analyze in wheat flour sample containing calper calcium peroxide by multiple Combination of Methods; Described method relates to: potential of hydrogen differentiates screening, luminol chemiluminescence, ash content XRF full elemental analysis and ash content X ray crystal diffraction, and four steps all use wheat flour former state below;
The first step: potential of hydrogen differentiates screening, takes wheat flour sample, add water stir and centrifugal after, require different according to test precision, choice for use accurate pH test paper, phenolphthalein reagent or pH meter can carry out potential of hydrogen test;
If add the aobvious pink of phenolphthalein, illustrate in wheat flour aqueous solution and may contain calper calcium peroxide, and content is not less than 0.05%; Other illegally add material may to there are talcum powder, chalk powder or gesso etc. in nondiscolouring explanation wheat flour aqueous solution;
Potential of hydrogen differentiate screening be for calper calcium peroxide aqueous solution in alkalescence, and wheat flour is in neutral feature, whether, by measuring wheat flour potential of hydrogen to be analyzed, as accurate pH test paper, pH meter measures and phenolphthalein discoloration test measures, differentiate wherein containing calper calcium peroxide fast;
Second step: luminol chemiluminescence is tested, and adds wheat flour sample, add water and make it become semifluid thick-pasty in beaker; Add watery hydrochloric acid again; 2-3 adds alkali lye rapidly after second, stirs; Add luminol reagent, then add catalyzer-potassium ferricyanide pressed powder, immediately whole chemiluminescence reaction system is placed in darkroom, observes while stirring;
If the wheat flour sample local in beaker starts namely have indistinct blue-fluorescence to occur, the follow-up increasing along with the amplitude of stirring, whole beaker all presents blueness, then wherein containing calper calcium peroxide; If do not produce chemiluminescence, and in conjunction with first step experiment, the not aobvious alkalescence of its potential of hydrogen, then illustrate in wheat flour sample not containing calper calcium peroxide;
Described luminol chemiluminescence produces hydrogen peroxide for calper calcium peroxide by chemical reaction, the latter produces the feature of chemiluminescence effect with luminol again, after wheat flour sample being mixed with the solution of certain concentration, differentiate wherein whether containing calper calcium peroxide fast by the process controlling luminol chemiluminescence reaction;
Described potential of hydrogen is differentiated screening method and is combined tentatively determine whether contain calper calcium peroxide in sample with described luminol chemiluminescence method;
3rd step: ash content XRF full elemental analysis, wheat flour sample, after calcination ashing, mixes according to weight ratio 1:1 ratio with cellulose, tabletted on sheeter, uses Xray fluorescence spectrometer to measure;
If compared with forming with the full element of wheat flour ash content, the percentage composition of K, P and Mg slightly reduces, and the content of Ca significantly increases, in conjunction with the first step and second step experimental result, judge containing calper calcium peroxide in sample, and content is not less than 0.05%;
Whether described ash content XRF full elemental analysis forms for the element of calper calcium peroxide, by will its element of ash content XRF full elemental analysis technical Analysis be utilized after the low temperature dry ashing of wheat flour sample to form, differentiate wherein containing calper calcium peroxide fast;
4th step: ash content X ray crystal diffraction, wheat flour sample is after calcination ashing, and ash content is tabletted on reeded slide, uses x-ray powder diffraction instrument to measure;
Because calper calcium peroxide calcination ashing products therefrom is CaO, the display of its ash content X ray crystal diffraction spectrogram respectively at 32 °, 2 θ angle, there is three strongest ones' line in 37.5 °, 54 ° three positions; If there is three strongest ones' line equally in these three positions in the ash content X ray crystal diffraction spectrogram of sample ash content, in error allowed band, its X-ray diffraction peak d value and peak are by force than during with CaO identical or close, then both prompting, contained material has identical structure, should be same substance; In conjunction with the experiment of other three steps, judge in wheat flour sample containing calper calcium peroxide by the test of ash content X ray crystal diffraction is final.
2. the analyzing detecting method of calper calcium peroxide in a kind of wheat flour according to claim 1, is characterized in that, in described 3rd step and the 4th step, wheat flour sample calcination temperature is: 550 DEG C, and calcination time is: 4h.
3. the analyzing detecting method of calper calcium peroxide in a kind of wheat flour according to claim 1, it is characterized in that, in described 4th step, the technological experiment condition using x-ray powder diffraction instrument to measure is: sweep limit 2 θ angle is 5 ゜ ~ 60 ゜, sampling step is wide is 0.02 ゜/step, and sweep velocity is 4 ゜/min.
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| CN106596526B (en) * | 2015-10-20 | 2020-01-07 | 谱尼测试集团江苏有限公司 | Method for detecting content of calcium peroxide in flour |
| CN109444121A (en) * | 2018-10-16 | 2019-03-08 | 河南工业大学 | The detection kit and detection method of calper calcium peroxide in a kind of flour |
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| CN102763697A (en) * | 2011-05-03 | 2012-11-07 | 丰益(上海)生物技术研发中心有限公司 | Flour improver or flour product improver |
| CN102901710A (en) * | 2012-09-24 | 2013-01-30 | 谱尼测试科技股份有限公司 | Enzyme-colorimetric method for detecting calcium peroxide in flour |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102763697A (en) * | 2011-05-03 | 2012-11-07 | 丰益(上海)生物技术研发中心有限公司 | Flour improver or flour product improver |
| CN102901710A (en) * | 2012-09-24 | 2013-01-30 | 谱尼测试科技股份有限公司 | Enzyme-colorimetric method for detecting calcium peroxide in flour |
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| X 射线衍射在纳米材料物理性能测试中的应用;张泽南等;《浙江工业大学学报》;20020228;第30卷(第1期);第31-35页 * |
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