CN1654946A - Quick test method for mineral oil in food - Google Patents
Quick test method for mineral oil in food Download PDFInfo
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- CN1654946A CN1654946A CN 200410022886 CN200410022886A CN1654946A CN 1654946 A CN1654946 A CN 1654946A CN 200410022886 CN200410022886 CN 200410022886 CN 200410022886 A CN200410022886 A CN 200410022886A CN 1654946 A CN1654946 A CN 1654946A
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- mineral oil
- food
- ether
- quickly detecting
- oil
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- Sampling And Sample Adjustment (AREA)
Abstract
A quick test method for mineral oil in food is to take a crushed and screened food sample in a container and add some ether in it to be digested for some time and filtered, put the filtered solution on a glass under the microscope after the ether is evaporated, it is observed by the microscope under dark site and those samples with mineral oils are like tassels or networks.
Description
Technical field
The present invention relates to the method for inspection of food in a kind of human daily life, be specifically related to a kind of method for quickly detecting of Mineral Oil in Food.
Background technology
Mineral oil mainly refers to the oil substances that paraffin, liquid paraffin, white oil etc. extract from oil, the GB2760-1996 food additives use hygienic standard that its usable range is had clear and definite defining, and can not directly add in the food edible.Outward appearance or the convenient processing of some manufacturers in order to improve food often directly adds mineral oil in the food, has damaged consumer's rights and interests, has formed a kind of social effects of pollution.Known handles rice, watermelon seeds with paraffin as brilliant polish, makes its gloss appearance good; Mineral oil added produce various beans vermicelli, particularly sweet potato noodles and potato bean vermicelli in the powder, inter-adhesive to prevent bean vermicelli, be convenient to the pine silk; Adding mineral oil in chafing dish bottom flavorings replaces butter that it can be hardened at normal temperatures.Because mineral oil is long carbon chain compound, human body can not absorb, decompose, and can influence consumer's health, simultaneously, has confirmed that paraffin can produce carcinogen after pyroprocessing, still do not have the Special Survey method to being mixed with in the food at present in the mineral oil national standard.Thereby the interests that a kind of method of inspection is fast safeguarded the consumer are badly in need of in food quality testing department, market surpervision department.
Summary of the invention
Technical matters to be solved by this invention is, solves to be mixed with mineral oil, infringement consumer health in more existing food and technical supervision, food quality inspection, market surpervision department do not have a kind of problem of method for quickly detecting; And provide a kind of highly sensitive, simple to operate, intuitive display, check fast, can be at the outdoor method for quickly detecting that carries out, makes things convenient for the healthy Mineral Oil in Food of field test, favourable strike counterfeit and shoddy goods, protection people.
The technical solution used in the present invention is: the food samples behind the crushing screening of learning from else's experience is in container, add ether after lixiviate a period of time, filter, getting filtrate dripping places on the slide, treat that ether evaporates rearmounted microscopically, observe in than dark field with microscope, what be added with mineral oil in the sample can be observed fibrous root shape or network-like or fibrous root shape and network-like.
Principle of the present invention is that its form, structure under ether lixiviate state have obviously and fixing difference according to mineral oil and vegetable oil.Owing to must use microscope when observing, so be called the microscopy method.This microscopy method is by following experimental demonstration: respectively add 100 milliliters of ether in three triangular flasks, the paraffin, white oil and the vegetable oil that add 0.2 gram respectively, shake up, after 5 minutes, respectively get one of ether solution on slide, treat that ether evaporates (about 2-3 minute) after, put microscopically, observe in dark field with 16 times of eyepiece * 10 times object lens, be added with paraffin, what see in the visual field is fibrous root shape thing; Be added with the network-like of white oil; Be added with the then rounded oil vacuole shape of vegetable oil, very be easy to difference.The mineral oil and the vegetable oil of ether lixiviate from the sample of food, the shape during microscopy are consistent with it.
Microscopy method of the present invention has obvious superiority: need not equipment such as water-bath, baking oven, air set pipe, electric furnace, broken through the limitation that can only carry out in the laboratory, and the sensitivity of this microscopy method can reach ten thousand/.Sampling weight 20 grams, only 2 hours proving time, each sample consumes only 30 milliliters of ether, expense is lower, and the microscopy method only needs a micromill and a microscope simultaneously, can detect at the outdoor scene of carrying out, simple to operate, intuitive display, check fast are suitable for food quality supervision department, market surpervision department makes fast detecting at the scene and uses.Obviously, this invention is being carried out that food is nuisanceless, the protection people are healthy, is hitting counterfeit and shoddy goods, is being safeguarded comparatively obvious social is arranged aspect the consumer legitimate right.
Embodiment
The food samples 20 of pulverizing 40 mesh sieves of learning from else's experience restrains in triangular flask, add the lixiviate of absolute ether 20-40 milliliter after 1-3 hour, use filter paper filtering, get one of filtrate and place on the slide, ether evaporates rearmounted microscopically and observes in dark field with 16 times of eyepiece * 10 times object lens.Can observe fibrous root shape thing or network-like thing, be added with mineral oil; What only observe the oil vacuole shape is to be added with vegetable oil (as rapeseed oil, peanut oil, palm oil), is added with mineral oil and vegetable oil simultaneously as sample, and the chromatography that the ether extract of then observing in the visual field is concentric circles distributes; The center is the ethanol extract of sample itself, and is different, not specification shape; The periphery is the extract of mineral oil, can be observed fibrous root shape or network-like; The edge be the vegetable oil extract, be the oil vacuole shape.The sample of getting the sweet potato noodles that is added with mineral oil, chafing dish bottom flavorings, rice, watermelon seeds comes microscopy with this method, the microscopy result is identical, promptly can observe fibrous root shape or network-like thing, all not observe fibrous root shape or network-like thing and contrast (promptly not adding mineral oil).Deeply the test back is found, even if only add in the powder powder weigh ten thousand/ the bean vermicelli made of mineral oil, also available this method tests out, sensitivity reached ten thousand/.
Embodiment: make things convenient in the powder in the production Ipomoea batatas, weigh 0.1% by starch from sweet potato and add paraffin, white oil, palm oil respectively, after adding the even matter of water stirring, produce sweet potato noodles according to a conventional method.Get each 20 gram of sample after this bean vermicelli was pulverized 40 mesh sieves, add 30 milliliters of lixiviates of absolute ether respectively and use filter paper filtering after 2 hours.Getting each one of filtrate places on the slide, treat that ether evaporates rearmounted microscopically, observe in 16 times of eyepiece * 10 times object lens than dark field, what be added with paraffin in the sample is the fibrous root shape, add the network-like of white oil, and be added with the palmitic oily foaming material of can only observing, do not observe fibrous root shape or network-like thing.
Claims (5)
1, a kind of method for quickly detecting of Mineral Oil in Food, it is characterized in that learning from else's experience food samples behind the crushing screening in container, add ether after lixiviate a period of time, filter, getting filtrate dripping places on the slide, treat that ether evaporates rearmounted microscopically, in than dark field, observe that what be added with mineral oil in the sample can be observed fibrous root shape or network-like or fibrous root shape and network-like with microscope.
2, the method for quickly detecting of Mineral Oil in Food according to claim 1 is characterized in that crossing 40 mesh sieves after described food is pulverized becomes food samples.
3, the method for quickly detecting of Mineral Oil in Food according to claim 1 is characterized in that described extraction time 1-3 hour.
4, the method for quickly detecting of Mineral Oil in Food according to claim 1, its feature is an absolute ether at the ether of described adding.
5, the method for quickly detecting of Mineral Oil in Food according to claim 1, the microscope that it is characterized in that described employing are 16 times of eyepiece * 10 times object lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100228866A CN100360936C (en) | 2004-02-12 | 2004-02-12 | Quick test method for mineral oil in food |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100228866A CN100360936C (en) | 2004-02-12 | 2004-02-12 | Quick test method for mineral oil in food |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1654946A true CN1654946A (en) | 2005-08-17 |
| CN100360936C CN100360936C (en) | 2008-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100228866A Expired - Fee Related CN100360936C (en) | 2004-02-12 | 2004-02-12 | Quick test method for mineral oil in food |
Country Status (1)
| Country | Link |
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| CN (1) | CN100360936C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437094C (en) * | 2005-11-10 | 2008-11-26 | 河南工业大学 | Method for fast detecting low-content mineral oil in edible oil and fat |
| CN101261212B (en) * | 2008-01-21 | 2011-06-15 | 南昌大学 | Method for quantitatively discriminating true or false lily bulb powder |
| CN103743741A (en) * | 2013-12-21 | 2014-04-23 | 广西科技大学 | Mineral oil detection reagent and application thereof |
| CN104792949A (en) * | 2015-05-09 | 2015-07-22 | 蔡建法 | Camellia oil purity detection needle |
| CN104792783A (en) * | 2015-05-05 | 2015-07-22 | 重庆工商大学 | Method for identifying mineral lubricating oil and fully synthesized lubricating oil |
| CN105241877A (en) * | 2015-10-20 | 2016-01-13 | 中国石油化工股份有限公司 | Reagent used for detecting refining degree of hydrogenated oil and method for detecting refining degree of hydrogenated oil |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109541B (en) * | 1985-12-29 | 1987-11-18 | 西北林学院 | Quality examination method and installation of raw lacquer |
| SU1605199A1 (en) * | 1988-12-29 | 1990-11-07 | Проектно-Конструкторское Бюро "Пунтукас" | Method of determining the amount of fat in oil-containing material |
| CN1075887C (en) * | 1999-08-16 | 2001-12-05 | 安阳市卫生防疫站 | Gas chromatography to detect poppy shell contained in food |
| CN1285908C (en) * | 1999-09-27 | 2006-11-22 | 孟山都公司 | Methods for determining oils in seeds |
| JP2003043024A (en) * | 2001-07-30 | 2003-02-13 | Asahi Breweries Ltd | Method for detecting oil mixed into beverage |
| JP2003156491A (en) * | 2001-11-20 | 2003-05-30 | Kubota Corp | Evaluation method of dioxins in combustion product |
-
2004
- 2004-02-12 CN CNB2004100228866A patent/CN100360936C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437094C (en) * | 2005-11-10 | 2008-11-26 | 河南工业大学 | Method for fast detecting low-content mineral oil in edible oil and fat |
| CN101261212B (en) * | 2008-01-21 | 2011-06-15 | 南昌大学 | Method for quantitatively discriminating true or false lily bulb powder |
| CN103743741A (en) * | 2013-12-21 | 2014-04-23 | 广西科技大学 | Mineral oil detection reagent and application thereof |
| CN104792783A (en) * | 2015-05-05 | 2015-07-22 | 重庆工商大学 | Method for identifying mineral lubricating oil and fully synthesized lubricating oil |
| CN104792949A (en) * | 2015-05-09 | 2015-07-22 | 蔡建法 | Camellia oil purity detection needle |
| CN104792949B (en) * | 2015-05-09 | 2016-06-29 | 蔡建法 | A kind of Camellia oil purity detecting pin |
| CN105241877A (en) * | 2015-10-20 | 2016-01-13 | 中国石油化工股份有限公司 | Reagent used for detecting refining degree of hydrogenated oil and method for detecting refining degree of hydrogenated oil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100360936C (en) | 2008-01-09 |
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| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shunhua Duck Industrial Developmet Co., Ltd., Linwu County, Hunan Assignor: Chen Ping Contract record no.: 2011430000073 Denomination of invention: Quick test method for mineral oil in food Granted publication date: 20080109 License type: Exclusive License Open date: 20050817 Record date: 20110601 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080109 Termination date: 20120212 |