CN103234924A - Rapid detection method for waste oil - Google Patents
Rapid detection method for waste oil Download PDFInfo
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- CN103234924A CN103234924A CN2013101243932A CN201310124393A CN103234924A CN 103234924 A CN103234924 A CN 103234924A CN 2013101243932 A CN2013101243932 A CN 2013101243932A CN 201310124393 A CN201310124393 A CN 201310124393A CN 103234924 A CN103234924 A CN 103234924A
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Abstract
The invention discloses a rapid detection method for waste oil, belonging to the analysis technical field. The method comprises the steps of: 1)preparation of a sodium ion standard solution; 2) preparation of a cesium nitrate solution (1%); 3) preparation of a hydrochloric acid solution (2%); 4) drawing of a working curve; 5) sample measurement and calculation. By using 1[mu]g / L as a sodium ion concentration standard, whether a tested oil sample is waste oil or mixed with waste oil can be quickly and efficiently determined. The method of the present invention requires simple equipment, is environment friendly, and simple and easy to control, provides further convenience for application in the edible oil quality inspection technical field, and is of great practical value.
Description
Technical field
The present invention relates to the method for quick of a kind of detection method, particularly a kind of waste oil.
Background technology
Waste oil refers to through cooking the meal cupboard leftover bits and pieces after eating, by the garbage grease of methods such as filtration, layering, decolouring extraction.This oil from be difficult in appearance and market on the edible oil difference come.But owing to process and contact with air for a long time through high-temperature cooking, its chemical property is compared with edible oil, and great changes will take place.According to the statistics made by the departments concerned, China has more than 3,000 ten thousand tons from waste oil or the swill that catering trade produces every year, and wherein the part waste oil flows back on the dining table again successively, causes a lot of " waste oil " event, and the people's health is brought significant damage.Be difficult to judge at short notice the existence of waste oil according to the detection method of conventional edible oil.The document application number is that 201210262743.7 Chinese invention patent has provided the method that a kind of biological tracer technique detects waste oil, the document application number is that 201210320081.4 Chinese invention patent proposes to differentiate the method for waste oil by detecting hydroxyl, these method complex operations, consuming time oversize.For this reason, research and develop a kind of method for quick of waste oil, have very important using value.
Summary of the invention
The method for quick that the purpose of this invention is to provide a kind of waste oil is realized the quick resolution of waste oil or swill and normal edible oil.
Because sodium ions content free in the edible oil of ordinary production is very little, exist hardly, and edible oil is through culinary art processing, edible and be converted into castoff of food and drink and be processed as in the process of waste oil, certainly to add and contain composite and sodium ion composite sodium chloride, the present invention is devoted to by the mensuration to sodium ions content in the oil samples, being the Na ion concentration standard with 1 μ g/L, whether be waste oil or be mixed with waste oil if fast and effeciently differentiating tested oil sample.
The present invention is achieved in that
In acid medium, be ionizer with the cesium nitrate, eliminate the ionization of sodion and disturb, absorb sodium ions content in the flame method working sample oil extract with atom, and then judge whether tested oil sample is waste oil or is mixed with waste oil.
Concrete technical scheme is as follows:
Step 1. takes by weighing after the sodium chloride 1.2711g of calcination dissolving and shakes up and is settled to 500mL, obtains the sodion storing solution.Sodion storing solution concentration is 1.0000g/mL, draws storing solution 1mL, moves in the 1000mL volumetric flask, is diluted to scale and gets standard operation liquid;
It is soluble in water that step 2. takes by weighing the 1g cesium nitrate, and be diluted to 100mL;
Step 3. is measured 2mL hydrochloric acid and is diluted with water to 100mL;
Step 4. is drawn standard operation liquid 0.0mL, 1.0mL, 2.0mL respectively, 3.0mL, 4.0mL, 5.0mL is in the 1000mL volumetric flask, add 1% cesium nitrate 3mL respectively, be diluted to scale with 2% hydrochloric acid, shake up, obtaining serial sodium titer is, concentration is respectively 0.0 μ g/L, 1.0 μ g/L, 2.0 μ g/L, 3.0 μ g/L, 4.0 μ g/L and 5.0 μ g/L;
Light acetylene gas after the selected instrument parameter input atom of step 5. absorbs, the absorbance of bioassay standard series sodion is horizontal ordinate with the sodium ions content, and absorbance A is the ordinate mapping;
Step 6. adds deionized water in oil sample in separating funnel, the vibration layering divides the water intaking layer;
Step 7. is got a certain amount of sample liquid in the 50mL volumetric flask, adds 1% cesium nitrate 3mL, is diluted to scale with 2% hydrochloric acid, shakes up.The absorbance of working sample is plotted to the sample absorbance on the standard working curve, finds the content of sodion from standard working curve.
In the method for quick of above-mentioned a kind of waste oil, described sodium chloride is high purity reagent.
In the method for quick of above-mentioned a kind of waste oil, described cesium nitrate is analytical reagent.
In the method for quick of above-mentioned a kind of waste oil, described cesium nitrate is analytical reagent.
In the method for quick of above-mentioned a kind of waste oil, described hydrochloric acid is high purity hydrochloric acid.
In the method for quick of above-mentioned a kind of waste oil, described instrument is atomic absorption spectrophotometer (AAS).
Beneficial effect, owing to adopted such scheme,
(1) the present invention absorbs sodium ions content in the flame method mensuration oil extraction sample with atom, has solved waste oil or swill fast detecting problem;
(2) the present invention has overcome the detection method of waste oil oversize defective consuming time in the literature method;
Reached purpose of the present invention.
Advantage: the method for quick of this waste oil, equipment needed thereby is simple, environmental friendliness, easy control simple to operate, mild condition for the application in the edible oil technical field of quality detection provides further convenience, has great practical value.
Embodiment
Further describe the present invention by following examples, but should notice that scope of the present invention is not limited by these embodiment.
Embodiment 1: a kind of method for quick of waste oil
Take by weighing after the sodium chloride 1.2711g of 600 ℃ of calcinations dissolving and shake up and be settled to 500mL, obtain the sodion storing solution.Sodion storing solution concentration is 1.0000g/mL, draws storing solution 1mL, moves in the 1000mL volumetric flask, is diluted to scale and gets standard operation liquid; It is soluble in water to take by weighing the 1g cesium nitrate, and is diluted to 100mL; Measure 2mL hydrochloric acid and be diluted with water to 100mL; Draw standard operation liquid 0.0mL respectively, 1.0mL, 2.0mL, 3.0mL, 4.0mL, 5.0mL is in the 1000mL volumetric flask, add 1% cesium nitrate 3mL respectively, be diluted to scale with 2% hydrochloric acid, shake up, obtaining serial sodium titer is, concentration is respectively 0.0 μ g/L, 1.0 μ g/L, 2.0 μ g/L, 3.0 μ g/L, 4.0 μ g/L and 5.0 μ g/L; Light acetylene gas after selected instrument parameter input atom absorbs, the absorbance of bioassay standard series sodion is horizontal ordinate with the sodium ions content, and absorbance A is the ordinate mapping; In separating funnel, add deionized water in the M oil sample, the vibration layering divides the water intaking layer; Get a certain amount of sample liquid in the 50mL volumetric flask, add 1% cesium nitrate 3mL, be diluted to scale with 2% hydrochloric acid, shake up.The absorbance of working sample is plotted to the sample absorbance on the standard working curve, and the content of finding sodion from standard working curve is 3 μ g/L.The M oil sample is waste oil.
Embodiment 2: a kind of method for quick of waste oil
Take by weighing after the sodium chloride 1.2711g of 650 ℃ of calcinations dissolving and shake up and be settled to 500mL, obtain the sodion storing solution.Sodion storing solution concentration is 1.0000g/mL, draws storing solution 1mL, moves in the 1000mL volumetric flask, is diluted to scale and gets standard operation liquid; It is soluble in water to take by weighing the 1g cesium nitrate, and is diluted to 100mL; Measure 2mL hydrochloric acid and be diluted with water to 100mL; Draw standard operation liquid 0.0mL respectively, 1.0mL, 2.0mL, 3.0mL, 4.0mL, 5.0mL is in the 1000mL volumetric flask, add 1% cesium nitrate 3mL respectively, be diluted to scale with 2% hydrochloric acid, shake up, obtaining serial sodium titer is, concentration is respectively 0.0 μ g/L, 1.0 μ g/L, 2.0 μ g/L, 3.0 μ g/L, 4.0 μ g/L and 5.0 μ g/L; Light acetylene gas after selected instrument parameter input atom absorbs, the absorbance of bioassay standard series sodion is horizontal ordinate with the sodium ions content, and absorbance A is the ordinate mapping; In separating funnel, add deionized water in the N oil sample, the vibration layering divides the water intaking layer; Get a certain amount of sample liquid in the 50mL volumetric flask, add 1% cesium nitrate 3mL, be diluted to scale with 2% hydrochloric acid, shake up.The absorbance of working sample is plotted to the sample absorbance on the standard working curve, and the content of finding sodion from standard working curve is 0.1 μ g/L.The N oil sample is not waste oil.
Embodiment 3: a kind of method for quick of waste oil
Take by weighing after the sodium chloride 1.2711g of 700 ℃ of calcinations dissolving and shake up and be settled to 500mL, obtain the sodion storing solution.Sodion storing solution concentration is 1.0000g/mL, draws storing solution 1mL, moves in the 1000mL volumetric flask, is diluted to scale and gets standard operation liquid; It is soluble in water to take by weighing the 1g cesium nitrate, and is diluted to 100mL; Measure 2mL hydrochloric acid and be diluted with water to 100mL; Draw standard operation liquid 0.0mL respectively, 1.0mL, 2.0mL, 3.0mL, 4.0mL, 5.0mL is in the 1000mL volumetric flask, add 1% cesium nitrate 3mL respectively, be diluted to scale with 2% hydrochloric acid, shake up, obtaining serial sodium titer is, concentration is respectively 0.0 μ g/L, 1.0 μ g/L, 2.0 μ g/L, 3.0 μ g/L, 4.0 μ g/L and 5.0 μ g/L; Light acetylene gas after selected instrument parameter input atom absorbs, the absorbance of bioassay standard series sodion is horizontal ordinate with the sodium ions content, and absorbance A is the ordinate mapping; In separating funnel, add deionized water in the W oil sample, the vibration layering divides the water intaking layer; Get a certain amount of sample liquid in the 50mL volumetric flask, add 1% cesium nitrate 3mL, be diluted to scale with 2% hydrochloric acid, shake up.The absorbance of working sample is plotted to the sample absorbance on the standard working curve, and the content of finding sodion from standard working curve is 5 μ g/L.The W oil sample is waste oil.
Claims (6)
1. the method for quick of a waste oil is characterized in that being made up of the following step:
Step 1. takes by weighing after the sodium chloride 1.2711g of calcination dissolving and shakes up and is settled to 500mL, obtains the sodion storing solution.Sodion storing solution concentration is 1.0000g/mL, draws storing solution 1mL, moves in the 1000mL volumetric flask, is diluted to scale and gets standard operation liquid;
It is soluble in water that step 2. takes by weighing the 1g cesium nitrate, and be diluted to 100mL;
Step 3. is measured 2mL hydrochloric acid and is diluted with water to 100mL;
Step 4. is drawn standard operation liquid 0.0mL, 1.0mL, 2.0mL respectively, 3.0mL, 4.0mL, 5.0mL is in the 1000mL volumetric flask, add 1% cesium nitrate 3mL respectively, be diluted to scale with 2% hydrochloric acid, shake up, obtaining serial sodium titer is, concentration is respectively 0.0 μ g/L, 1.0 μ g/L, 2.0 μ g/L, 3.0 μ g/L, 4.0 μ g/L and 5.0 μ g/L;
Light acetylene gas after the selected instrument parameter input atom of step 5. absorbs, the absorbance of bioassay standard series sodion is horizontal ordinate with the sodium ions content, and absorbance A is the ordinate mapping;
Step 6. adds deionized water in oil sample in separating funnel, the vibration layering divides the water intaking layer;
Step 7. is got a certain amount of sample liquid in the 50mL volumetric flask, adds 1% cesium nitrate 3mL, is diluted to scale with 2% hydrochloric acid, shakes up.The absorbance of working sample is plotted to the sample absorbance on the standard working curve, finds the content of sodion from standard working curve.
2. the method for quick of a kind of waste oil according to claim 1, it is characterized in that: the described sodium chloride of step 1 is high purity reagent.
3. the method for quick of a kind of waste oil according to claim 1, it is characterized in that: the described calcination temperature of step 1 is 600-700 ℃
4. the method for quick of a kind of waste oil according to claim 1, it is characterized in that: the described cesium nitrate of step 2 is analytical reagent.
5. the method for quick of a kind of waste oil according to claim 1, it is characterized in that: the described hydrochloric acid of step 3 is that concentration is high purity hydrochloric acid.
6. the method for quick of a kind of waste oil according to claim 1, it is characterized in that: the described instrument of step 5 is atomic absorption spectrophotometer (AAS).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535509A (en) * | 2014-12-13 | 2015-04-22 | 广西科技大学 | Method for qualitative detection of hogwash oil |
| CN106370769A (en) * | 2016-08-17 | 2017-02-01 | 安徽省怀远县鑫泰粮油有限公司 | Recovered oil detection liquid |
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| CN102706816A (en) * | 2012-05-25 | 2012-10-03 | 中国航空工业集团公司北京航空材料研究院 | Method for determination of trace element Na and K in pure Re |
| CN102706815A (en) * | 2012-05-25 | 2012-10-03 | 中国航空工业集团公司北京航空材料研究院 | Method for determination of trace element Na in pure Hf (hafnium) |
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| CN102706816A (en) * | 2012-05-25 | 2012-10-03 | 中国航空工业集团公司北京航空材料研究院 | Method for determination of trace element Na and K in pure Re |
| CN102706815A (en) * | 2012-05-25 | 2012-10-03 | 中国航空工业集团公司北京航空材料研究院 | Method for determination of trace element Na in pure Hf (hafnium) |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535509A (en) * | 2014-12-13 | 2015-04-22 | 广西科技大学 | Method for qualitative detection of hogwash oil |
| CN106370769A (en) * | 2016-08-17 | 2017-02-01 | 安徽省怀远县鑫泰粮油有限公司 | Recovered oil detection liquid |
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Application publication date: 20130807 |