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Method for detecting swill-cooked dirty oil by using biology tracer technique

A tracer technology and waste oil technology, which is applied in the field of waste oil detection using biological tracer technology, can solve problems such as difficulty in detection, and achieve the effect of preventing circulation and being difficult to separate and remove.

Active Publication Date: 2012-12-19
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because unscrupulous traders have carried out various simple and low-cost treatments on waste oil, it has caused great difficulties in detection

Method used

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  • Method for detecting swill-cooked dirty oil by using biology tracer technique

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Select ascorbyl palmitate as an antioxidant, and judge whether it is waste oil by detecting tracers. The specific implementation steps are as follows:

[0021] (1) Preparation of tested samples

[0022] Sample 1: ≤0.2 g of ascorbyl palmitate was added to 1 kg of fresh edible oil. Place it at a temperature of 100-250°C and heat it for 1-500 times, each time for 5-20 minutes, and then cool it, which is the tested sample 1 that simulates waste oil.

[0023] Sample 2: Mix sample 1 into fresh edible oil at a ratio of ≤15%, and mix well, which is the tested sample 2 of simulated waste oil.

[0024] (2) Detection of tracers in samples

[0025] The tracer includes ascorbyl palmitate itself, and ascorbyl palmitate will produce some pyrolysis tracers under different heating degrees, including ascorbic acid, palmitic acid, dehydroascorbic acid, diketogulonic acid, etc. According to the type of tracer, select the corresponding, accurate, fast and reasonable detection method.

...

example 2

[0029] Choose ascorbyl lactate as an antioxidant.

[0030] (1) Preparation of tested samples

[0031] Sample 1: ≤0.2 g of ascorbyl lactate was added to 1 kg of fresh cooking oil. Place it at a temperature of 100-250°C and heat it for 1-500 times, each time for 5-20 minutes, and then cool it, which is the tested sample 1 that simulates waste oil.

[0032] Sample 2: Mix sample 1 into fresh edible oil at a ratio of ≤15%, and mix well, which is the tested sample 2 of simulated waste oil.

[0033] (2) Detection of tracers in samples

[0034] Tracers are: ascorbyl lactate, ascorbic acid, lactic acid, dehydroascorbic acid, diketogulonic acid, etc.

[0035] (3) Judgment criteria

[0036] If the detected tracer is thermal decomposition products of ascorbyl lactate such as ascorbic acid, lactic acid, dehydroascorbic acid, diketogulonic acid, etc., it can indicate that the oil has been heated once or more times, and it is waste oil. The tracer is ascorbyl lactate, which indicates th...

example 3

[0038] Select ascorbyl palmitate as the antioxidant of fresh edible oil, use its thermal decomposition product as a biological tracer, and judge whether it is waste oil by detecting the tracer. The specific implementation steps are as follows:

[0039] (1) Preparation of tested samples

[0040] Sample 1: Add 0.1 g of ascorbyl palmitate to 1 kg of fresh edible oil as sample 1.

[0041] Sample 2: Heat sample 1 at a temperature of 170 ℃ for 200 times, 10 minutes each time, and then cool down to simulate waste oil (because there are many unscrupulous vendors in the market, when frying, their frying times are almost 1 -500 times), which is the tested sample 2.

[0042] Sample 3: Mix sample 2 into fresh edible oil at a ratio of 10%, and mix well, which is the tested sample 3.

[0043] (2) Detection of tracers in samples

[0044] The tracer includes ascorbyl palmitate itself, and ascorbyl palmitate will produce some pyrolysis tracers under different heating degrees, including asco...

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Abstract

The invention discloses a method for detecting swill-cooked dirty oil by using a biology tracer technique. An antioxidant capable of carrying out thermal decomposition is added in fresh edible oil in a scope of food additives, the antioxidant and thermal decomposition matters of the antioxidant serve as tracers, the oil can be detected to be the swill-cooked dirty oil if any thermal decomposition matter of the antioxidant is detected. With the adoption of the method, a swill-cooked dirty oil sample which comprises a sample of the fresh edible oil doped with the swill-cooked dirty oil can be effectively identified, the tracers generated by the thermal decomposition are various and not easy to separate and remove, so that accordingly circulation of the swill-cooked dirty oil on the market is avoided.

Description

technical field [0001] The invention belongs to the field of waste oil detection by biological tracer method, in particular to a method for detection of waste oil by biological tracer technology. Background technique [0002] As a kind of inferior oil, gutter oil has heavy metals, toxins, peroxide value, etc., which are seriously exceeding the standard, and contains chemical impurities such as detergents, which seriously endanger human health. In order to make huge profits, many unscrupulous traders sell the waste oil as edible oil or blend it into fresh edible oil after simple processing such as washing, distillation, and decolorization. Although the relevant national departments have introduced some measures (on March 18, 2010, the Office of the State Food and Drug Administration issued the "Urgent Notice on Preventing "Gutter Oil" from Flowing into Catering Services" (Food and Drug Administration Shi [2010] No. 25) ), but due to the lag in the detection of waste oil tech...

Claims

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Application Information

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IPC IPC(8): G01N33/03
Inventor 郑磊王菊马飞陈伟刘健阮班峰李炳南姚日生
Owner HEFEI UNIV OF TECH
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