Fish meat petroleum hydrocarbon content determination method

A technology of petroleum hydrocarbon content and determination method, which is applied in the field of food

Inactive Publication Date: 2008-08-13
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But, the method that adopts infrared spectrophotometry to measure petroleum hydrocarbon content in fish meat has not seen report

Method used

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  • Fish meat petroleum hydrocarbon content determination method
  • Fish meat petroleum hydrocarbon content determination method
  • Fish meat petroleum hydrocarbon content determination method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0129] Example 1 Determination of petroleum hydrocarbon content in silver carp

[0130] Perform the measurement according to the following steps:

[0131] 1. Fish processing steps

[0132] The silver carp purchased from Qingshan Market is scaled, peeled, and then the meat is taken, and then mashed and mixed with a JJ-2 tissue mashing homogenizer produced by Jiangsu Changzhou Guohua Instrument Factory, and the obtained fish paste is placed in a sealed container. Store in a glass bottle at a temperature of -20°C for later use.

[0133] 2. Saponification of fish

[0134] Thaw the fish paste obtained in step (1), weigh 2.5 g of fish paste into an iodine measuring flask, and add 15 ml of 5mol / L analytically pure sodium hydroxide solution (deionized water, in line with GB / T 6682 standard level 1 water , Sinopharm Chemical Preparation Co., Ltd.), adding 20 mL of absolute ethanol, shaking and saponifying at 30°C for 20 hours to prepare fish digestion.

[0135] 3. Extraction and adsorption...

Example Embodiment

[0156] Example 2 Determination of petroleum hydrocarbon content in grass carp

[0157] Follow the steps below to determine:

[0158] 1. Fish processing steps

[0159] The grass carp purchased from Qingshan Market is descaled and peeled, and then the meat is taken, and then mashed and mixed with the JJ-2 tissue mashing homogenizer produced by Jiangsu Changzhou Guohua Instrument Factory. The obtained fish paste is placed in a sealed glass bottle Medium, keep it at -20℃ for later use.

[0160] 2. Saponification of fish

[0161] Thaw the fish paste obtained in step (1), weigh 2.8g of fish paste into an iodine measuring flask, and add 15 mL of 6mol / L analytically pure sodium hydroxide solution (deionized water, in line with GB / T 6682 standard level 1 water , Sinopharm Chemical Preparation Co., Ltd.), adding 15 mL of absolute ethanol, shaking and saponifying at 30°C for 20 hours to prepare fish digestion.

[0162] 3. Extraction and adsorption

[0163] Pour 100 mL of the fish digestion s...

Example Embodiment

[0176] Example 3 Determination of petroleum hydrocarbon content in squid

[0177] Follow the steps below to determine:

[0178] 1. Fish processing steps

[0179] The squid purchased from Qingshan Market is taken from its meat, and then mashed and mixed with a JJ-2 tissue mashing homogenizer produced by Jiangsu Changzhou Guohua Instrument Factory. The obtained fish paste is placed in a sealed glass bottle at a temperature of -20 Store at ℃ for later use.

[0180] 2. Saponification of fish

[0181] Thaw the fish paste obtained in step (1), weigh 2.3 grams of fish paste into an iodine measuring flask, and add 20 mL of 6mol / L analytically pure sodium hydroxide solution (deionized water, in line with GB / T 6682 Grade 1 water standard , Sinopharm Chemical Preparation Co., Ltd.), adding 15 mL of absolute ethanol, shaking and saponifying at 35°C for 18 hours to prepare fish digestion.

[0182] 3. Extraction and adsorption

[0183] Pour 100 mL of the fish digestion solution obtained in step...

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Abstract

The present invention relates to a method for detecting the content of petroleum hydrocarbon in fish by infrared spectroscopy. The present invention eliminates impurity disturb by fish saponification step, extraction step and adsorption step to detect petroleum hydrocarbon residual content in the marine lives rapidly and accurately by infrared spectrophotometry. The method of present invention has the characteristics of low detection limit, small relative standard deviation and high precision.

Description

【Technical field】 [0001] The invention relates to the technical field of food, and more specifically, the invention relates to a method for determining the petroleum hydrocarbon content in fish by infrared spectroscopy. 【Background technique】 [0002] Fish is rich in animal fat and protein, petroleum hydrocarbons are enriched in animal fat, and oil is distributed in fish tissue and closely combined with protein. It is known that petroleum hydrocarbons generally contain methyl and methylene groups, and alkane and cycloalkane in petroleum account for 70-80% of the total hydrocarbons. CH in these two hydrocarbons 3 、CH 2 , CH is the basis of infrared spectrophotometry. By measuring the CH 2 Stretching vibration of group C-H bond 2930cm -1 、CH 3 Stretching vibration of group C-H bond 2960cm -1 Stretching vibration of the C-H bond with the aromatic ring 3030cm -1 The absorbance value can be used to measure and calculate the content of petroleum hydrocarbons in organisms. ...

Claims

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Application Information

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IPC IPC(8): G01N21/35G01N1/34G01N1/40G06F19/00G01N21/3563
Inventor 顾小红赵燕汤坚
Owner JIANGNAN UNIV
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