CN103398981B - A kind of waste oil detection method - Google Patents
A kind of waste oil detection method Download PDFInfo
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- CN103398981B CN103398981B CN201310369145.4A CN201310369145A CN103398981B CN 103398981 B CN103398981 B CN 103398981B CN 201310369145 A CN201310369145 A CN 201310369145A CN 103398981 B CN103398981 B CN 103398981B
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Abstract
The invention discloses a kind of waste oil detection method, it is characterized in that, fluid to be detected is added in particular solution, through to shake up and vibration makes fluid to be detected be decomposed into equally distributed molecular level particle in solution, the optical devices that can detect molecules in solution grade particles particle diameter are adopted to detect solution again, obtain the grain size distribution of molecular level particle in particular solution that fluid to be detected is formed, by this grain size distribution and the sample particle diameter distribution plan contrast adopting standard model acquisition in advance, can judge whether fluid to be detected belongs to waste oil.Compared to prior art, the present invention can carry out judgement to waste oil and detect, and has judgment accuracy high, easy to operate, simple advantage.Reach the object of convenient and swift detection waste oil or hogwash fat.
Description
Technical field
The present invention relates to a kind of method that light scattering technique need be adopted to detect waste oil, specifically the method for discrimination of a kind of normal edible oil and waste oil/hogwash fat.
Background technology
The all unedible greases inferior of waste oil general reference, in waste oil such as, containing a large amount of objectionable impurities, heavy metal, nitrite, benzopyrene, aflatoxins, trans-fatty acid etc.Long-term absorption waste oil can cause great injury to human body, such as diarrhoea, enteritis, insomnia, depauperation, and with heart, liver etc., pathology occurs, and even brings out cancer.
At present, waste oil has been utilized to produce the industrial goods such as fuel, plastic additive, rubber in scientific and technological developed countries such as Great Britain and Americas; At home, because management system and development technique limit, waste oil is large quantities of under the utilization of undesirable returns dining table, and this causes great threat to the life health of people.So while the management intensity strengthening laws and regulations, be also extremely urgent to the research of waste oil detection technique.
And now, waste oil is processed through the refining in various degree such as washing, decolouring, deodorization, cannot identification be whether be mixed with waste oil in waste oil and edible oil and edible oil with common " see, hear, taste, listen, ask ".The conventional waste oil authentication method of major part is as mass spectroscopy, and instrument is valuable, complicated operation, waste time and energy; High performance liquid chromatography is consuming time longer, complex operation, and result reappearance is poor; Nuclear magnetic resonance method is measured accurately, reproducible, but also there is experimental apparatus, conditional request high, and for because of many containing saturated fatty acid and solidifying point is higher grease effect is general; Electrical conductivity method is not suitable for intensive conch meal kitchen waste oil; Cholesterol method is representative not enough, can cause erroneous judgement.Therefore, find rapid and simple, time saving and energy saving, the waste oil of detection effectively accurately method seems of crucial importance.
In existing patent, CN102023143A once disclosed a kind of Quick detection method for swill-cooked dirty oil by light scattering, in the method, directly will be detected oil and suck sensing chamber, then adopt light source to send light beam through fluid to detected fluid, then receive this light beam and analyze, utilize waste oil by force light scattering, the light scattering weak feature of standard edible oil, judges.But the research of applicant's specific experiment finds, due to the impurity only containing minute quantity in waste oil, the overwhelming majority is the fluid identical with edible oil character, and impurity also usually has water white feature, therefore when adopting the method to judge, in fact be difficult to embody difference, be difficult to improve judgment accuracy.
Summary of the invention
For the problems referred to above and deficiency, technical matters to be solved by this invention is: how to provide a kind of judgment accuracy high, easy to operate, simple waste oil detection method.Reach the object of convenient and swift detection waste oil or hogwash fat.
In order to solve the problem, present invention employs following technical scheme.
A kind of waste oil detection method, it is characterized in that, fluid to be detected is added in particular solution, through to shake up and vibration makes fluid to be detected be decomposed into equally distributed molecular level particle in solution, the optical devices that can detect molecules in solution grade particles particle diameter are adopted to detect solution again, obtain the grain size distribution of molecular level particle in particular solution that fluid to be detected is formed, by this grain size distribution and the sample particle diameter distribution plan contrast adopting standard model acquisition in advance, can judge whether fluid to be detected belongs to waste oil.
Specifically said method, comprises the following steps: a, adopt waste oil sample and standard edible oil sample, to join in particular solution separately and loads in glass test tube, carry out the duration sonic oscillation process of five minutes after shaking up respectively with the ratio of volume ratio 1:4; Adopt the optical devices that can detect molecules in solution grade particles particle diameter again, under the same measuring conditions, solution in glass test tube is detected, obtain waste oil sample particle diameter distribution plan and standard edible oil sample grain size distribution;
B, adopt fluid to be detected, to join in particular solution with the ratio of volume ratio 1:4 and load in glass test tube, after shaking up, carrying out the duration sonic oscillation process of five minutes; Optical devices described in a step, under the same measuring conditions, solution in glass test tube is detected, obtain fluid grain size distribution to be detected, by fluid grain size distribution to be detected respectively with waste oil sample particle diameter distribution plan and standard edible oil sample grain size distribution, if fluid grain size distribution to be detected is consistent or close with waste oil sample particle diameter distribution plan, then judge that fluid to be detected is waste oil; If fluid grain size distribution to be detected is consistent or close with standard edible oil sample grain size distribution, then judge that fluid to be detected is standard edible oil.
In the present invention, make use of fluid in particular solution through shake up with supersonic oscillations after can form the characteristic of uniform molecular level particle.For standard edible oil, its fluid material is single, can generate relatively large particle under the same conditions.And for waste oil, owing to containing other materials such as plurality of heavy metal, nitrite, benzopyrene, aflatoxins, trans-fatty acid in fluid, more tiny particle can be generated under the same conditions.Then adopt optical devices to detect, visibly different grain size distribution can be drawn, and then multilevel iudge can be realized easily, draw the conclusion of whether waste oil.So the inventive method can not only detect waste oil, and different oil samples can be judged.The inventive method detection speed is fast simultaneously, within about 5 minutes, can complete the detection of a sample.In addition, it is simple that the inventive method also has sample preparation, easy to operate feature.
In sum, compared to prior art, the present invention can carry out judgement to waste oil and detect, and has judgment accuracy high, easy to operate, simple advantage.Reach the object of convenient and swift detection waste oil or hogwash fat.
Accompanying drawing explanation
When Fig. 1 is for specifically implementing, the waste oil sample particle diameter distribution plan adopting waste oil sample to obtain in a step.
When Fig. 2 is for specifically implementing, in a step, adopt the corn oil sample particle diameter distribution plan that normal edible corn oil samples obtains.
When Fig. 3 is for specifically implementing, in b step, adopt the soybean oil sample particle diameter distribution plan that normal human consumption soybean oil samples obtains.
Embodiment
Below in conjunction with accompanying drawing and concrete embodiment, the present invention is described in further detail.
Concrete embodiment: a kind of waste oil detection method, fluid to be detected is added in particular solution, through to shake up and vibration makes fluid to be detected form equally distributed molecular level particle in solution, the optical devices that can detect molecules in solution grade particles particle diameter are adopted to detect solution again, obtain the grain size distribution of molecular level particle in particular solution that fluid to be detected is formed, by this grain size distribution and the sample particle diameter distribution plan contrast adopting standard model acquisition in advance, can judge whether fluid to be detected belongs to waste oil.
This method specifically comprises the following steps: a, adopt waste oil sample and standard edible oil sample, to join in particular solution separately and loads in glass test tube, carry out the duration sonic oscillation process of five minutes after shaking up respectively with the ratio of volume ratio 1:4; Adopt the optical devices that can detect molecules in solution grade particles particle diameter again, under the same measuring conditions, solution in glass test tube is detected, obtain waste oil sample particle diameter distribution plan and standard edible oil sample grain size distribution;
B, adopt fluid to be detected, to join in particular solution with the ratio of volume ratio 1:4 and load in glass test tube, after shaking up, carrying out the duration sonic oscillation process of five minutes; Optical devices described in a step, under the same measuring conditions, solution in glass test tube is detected, obtain fluid grain size distribution to be detected, by fluid grain size distribution to be detected respectively with waste oil sample particle diameter distribution plan and standard edible oil sample grain size distribution, if fluid grain size distribution to be detected is consistent or close with waste oil sample particle diameter distribution plan, then judge that fluid to be detected is waste oil; If fluid grain size distribution to be detected is consistent or close with standard edible oil sample grain size distribution, then judge that fluid to be detected is standard edible oil.
In above-mentioned concrete embodiment, the particular solution of employing is sherwood oil, and its principle is the solvent as grease, adopts this solution can more be beneficial to fluid and within it dissolves, and generate the molecular level granule of minor diameter.Join in 20ml particular solution in conjunction with the concrete desirable 5ml fluid of 1:4(again) additional proportion, the granule generated in solution can not be crossed rare or overstocked, in conjunction with the supersonic oscillations time of five minutes, make the granule generated in solution can not be excessive or too small, make it be beneficial to and observe and detect and larger particle size range difference can be embodied, be beneficial to contrast and judge.The wherein said optical devices that can detect molecules in solution grade particles particle diameter, belong to prior art, such as a kind of particle measurer fractal based on dynamic light scattering signal disclosed in CN2583666, or some other possesses the existing product device of this measuring ability.In this concrete embodiment, be the existing product device of a kind of direct purchase adopted, its name of product is wide-angle sound state laser light scattering instrument product type is BI-200SM.Adopt the device of this product, there is enforcement convenient, detect reliable advantage.Wherein, described identical measuring condition, refers to the measuring tempeature of measurement mechanism, takes measurement of an angle, measures the Parameter Conditions such as wavelength unanimously, can guarantee that testing result can not cause difference because parameter is different like this.
In above-mentioned concrete embodiment, applicant have employed the waste oil of purchase and edible corn oil respectively as sample, by a step, obtains waste oil sample particle diameter distribution plan and standard edible oil sample grain size distribution; Then have purchased edible soybean oil as trial target, the grain size distribution being obtained soybean oil by b step carries out contrast detection.
Wherein, as shown in Figure 1, as can be seen from this grain size distribution, waste oil sample Middle molecule domain size distribution is within the scope of 200nm ~ 360nm for the grain size distribution of the waste oil sample obtained.
As shown in Figure 2, as can be seen from this grain size distribution, corn oil sample Middle molecule domain size distribution is within the scope of 1600nm ~ 2400nm for the grain size distribution of the corn oil sample obtained.Completely different with the particle size distribution range of waste oil sample.
The grain size distribution of the soybean oil sample obtained is as Fig. 3, as can be seen from this grain size distribution, soybean oil sample Middle molecule domain size distribution is completely the same with corn oil sample Middle molecule particle size range in the grain size distribution of corn oil sample within the scope of 1600nm ~ 2400nm, and both reality is edible normal plants oil.Therefore testing result and actual conditions are coincide.Show that this method is practical.
Claims (2)
1. a waste oil detection method, it is characterized in that, fluid to be detected is added in particular solution, through to shake up and vibration makes fluid to be detected be decomposed into equally distributed molecular level particle in solution, described particular solution makes fluid add and after shaking up and vibrating, relatively large particle can be formed under the same conditions for standard edible oil, more tiny particle can be generated under the same conditions for the heavy metal contained in waste oil, nitrite, benzopyrene, aflatoxins or trans-fatty acid; The optical devices that can detect molecules in solution grade particles particle diameter are adopted to detect solution again, obtain the grain size distribution of molecular level particle in particular solution that fluid to be detected is formed, by this grain size distribution and the sample particle diameter distribution plan contrast adopting standard model acquisition in advance, can judge whether fluid to be detected belongs to waste oil.
2. waste oil detection method as claimed in claim 1, it is characterized in that, specifically comprise the following steps: a, employing waste oil sample and standard edible oil sample, to join in particular solution with the ratio of volume ratio 1:4 separately and load in glass test tube, after shaking up respectively, carrying out the duration sonic oscillation process of five minutes; Adopt the optical devices that can detect molecules in solution grade particles particle diameter again, under the same measuring conditions, solution in glass test tube is detected, obtain waste oil sample particle diameter distribution plan and standard edible oil sample grain size distribution;
B, adopt fluid to be detected, to join in particular solution with the ratio of volume ratio 1:4 and load in glass test tube, after shaking up, carrying out the duration sonic oscillation process of five minutes; Optical devices described in a step, under the same measuring conditions, solution in glass test tube is detected, obtain fluid grain size distribution to be detected, fluid grain size distribution to be detected is compared with waste oil sample particle diameter distribution plan and standard edible oil sample grain size distribution respectively, if fluid grain size distribution to be detected is consistent or close with waste oil sample particle diameter distribution plan, then judge that fluid to be detected is waste oil; If fluid grain size distribution to be detected is consistent or close with standard edible oil sample grain size distribution, then judge that fluid to be detected is standard edible oil.
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| CN104020143B (en) * | 2014-06-09 | 2017-01-18 | 江西农业大学 | Method for quickly detecting benzopyrene content of edible oil based on collinear double-pulse LIBS (Laser-induced Breakdown Spectroscopy) technique |
| CN104614499A (en) * | 2015-01-22 | 2015-05-13 | 安徽华安食品有限公司 | Method for quickly identifying illegal cooking oil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502981A (en) * | 2002-11-20 | 2004-06-09 | 上海理工大学 | Granule measurement method and device based on dynamic light scuttering signal parting |
| CN102004082A (en) * | 2010-11-11 | 2011-04-06 | 西安融慧专利产品开发咨询有限责任公司 | Method for quickly detecting illegal cooking oil |
| CN102023143A (en) * | 2010-11-11 | 2011-04-20 | 西安融慧专利产品开发咨询有限责任公司 | Quick detection method for swill-cooked dirty oil by light scattering |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502981A (en) * | 2002-11-20 | 2004-06-09 | 上海理工大学 | Granule measurement method and device based on dynamic light scuttering signal parting |
| CN102004082A (en) * | 2010-11-11 | 2011-04-06 | 西安融慧专利产品开发咨询有限责任公司 | Method for quickly detecting illegal cooking oil |
| CN102023143A (en) * | 2010-11-11 | 2011-04-20 | 西安融慧专利产品开发咨询有限责任公司 | Quick detection method for swill-cooked dirty oil by light scattering |
Non-Patent Citations (2)
| Title |
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| 地沟油检测方法的研究进展;何艳妮等;《食品研究与开发》;20130731;第34卷(第13期);103-106 * |
| 基于动态光散射的超细颗粒测试技术研究;王远;《中国优秀硕士学位论文全文数据库》;20051215;第18-24页 * |
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