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How to detect gutter oil

A technology for gutter oil and oil measurement, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problem of undetectable hogwash oil, etc., and achieve the effect of high degree of automation, good resolution and fast speed

Inactive Publication Date: 2011-12-28
同码信息科技(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for many places in China, hogwash oil does not necessarily contain these ingredients, so this method cannot detect hogwash oil without these ingredients

Method used

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  • How to detect gutter oil
  • How to detect gutter oil
  • How to detect gutter oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0021] The oil sample to be tested in this embodiment is waste oil.

[0022] The detection method of the present embodiment has the following steps:

[0023] ① Add 10mL of waste oil into a 20mL headspace bottle, cover the bottle, heat to 100°C and shake the headspace bottle vigorously, then equilibrate for 50min, and wait for use after stabilization;

[0024] ② Use a syringe to absorb 80 μL of the gas in the upper layer of the balanced headspace bottle in step ① and inject it into the gas chromatography-mass spectrometry instrument, and obtain the gas chromatography-mass spectrometry spectrum under the set chromatography conditions and mass spectrometry conditions. Among them GC-MS total ion chromatogram see figure 1 .

[0025] The chromatographic conditions set are: inlet temperature 230°C; chromatographic column: HP-5ms (0.25mm×30m×0.25μm); carrier gas is helium (purity 99.99%), flow rate is 1.0mL / min; column The temperature adopts a temperature program: the initial tempe...

Embodiment 2）

[0029] The oil sample to be tested in this embodiment is decolorized and deodorized waste oil.

[0030] The detection method of the present embodiment has the following steps:

[0031] ①Add 10mL of decolorized and deodorized waste oil into a 20mL headspace bottle, cover the bottle, heat to 80°C and shake the headspace bottle vigorously, then equilibrate for 40min, and wait for use after stabilization;

[0032] ② Use a syringe to absorb 70 μL of the gas in the upper layer of the balanced headspace bottle in step ① and inject it into the gas chromatography-mass spectrometry instrument, and obtain the gas chromatography-mass spectrometry spectrum under the set chromatographic conditions and mass spectrometry conditions. GC-MS total ion chromatogram see figure 2 .

[0033] The chromatographic conditions and mass spectrometry conditions set in this embodiment are the same as those in Embodiment 1.

[0034] ③ The gas chromatography-mass spectrometry spectrum obtained in step ② w...

Embodiment 3）

[0036] In this example, the oil sample to be tested is edible oil blended with decolorized and deodorized waste oil, wherein the content of decolorized and deodorized waste oil is 1% (volume percentage, the same below).

[0037] The detection method of the present embodiment has the following steps:

[0038] ①Add 10mL of the oil sample to be tested into a 20mL headspace bottle, cover the bottle, heat to 60°C and shake the headspace bottle vigorously, then equilibrate for 30min, and wait for use after stabilization;

[0039] ② Use a syringe to absorb 60 μL of the gas in the upper layer of the balanced headspace bottle in step ① and inject it into the gas chromatography-mass spectrometry instrument, and obtain the gas chromatography-mass spectrometry spectrum under the set chromatographic and mass spectrometry conditions.

[0040] The chromatographic conditions and mass spectrometry conditions set in this embodiment are the same as those in Embodiment 1.

[0041] ③ The gas chro...

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Abstract

The invention discloses a method for detecting gutter oil. The method comprises: ①adding the oil sample to be tested into a headspace bottle, shaking the headspace bottle at a temperature of 40°C-150°C, and then balancing for 10min-120min; ②use The syringe absorbs the gas in the upper layer of the balanced headspace bottle and injects it into the gas chromatography-mass spectrometry instrument, and obtains the gas chromatography-mass spectrometry spectrum under the set chromatographic conditions and mass spectrometry conditions; Chromatography-mass spectrometry is used for qualitative analysis; when it is detected that the oil sample to be tested contains fatty acids, it is determined that the oil sample to be tested is waste oil or contains waste oil; the fatty acids are acetic acid, propionic acid, butyric acid, One or two or more of valeric acid and caproic acid. The method of the invention has good accuracy and is applicable to the detection of all waste oils.

Description

technical field [0001] The invention relates to a method for detecting waste oil. Background technique [0002] Waste oil mainly includes three categories: (1) waste oil in a narrow sense, that is, the greasy floating matter in the sewer or the oil that is simply processed and extracted from the leftovers and leftovers of hotels and restaurants. (2) Oil extracted from low-quality pork, pig viscera, and pig skin. (3) The oil used for frying food is used more than a certain number of times, and then reused or re-used after adding some new oil to it. In 2002, the Ministry of Health, the State Administration for Industry and Commerce, the State Environmental Protection Administration and the Ministry of Construction jointly issued the "Regulations on the Management of Waste Edible Oils and Fats in Food Production and Operation Units", which clearly pointed out that waste oils should not be used or sold as edible oils after processing. [0003] At present, the most common metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 毕承路盛华张泓
Owner 同码信息科技(常州)有限公司
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