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Column for purifying pesticide residue and purification method thereof

A pesticide residue and purification column technology, applied in chemical instruments and methods, separation methods, solid adsorbent liquid separation, etc., can solve the problems of unsuitability for multi-component processing, limited application range, long processing time, etc. Wide, accurate test results, low cost effect

Inactive Publication Date: 2005-10-05
中国进出口商品检验技术研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The purpose of purifying the residual pesticides extracted from food is to accurately detect the residual drugs and prohibited substances in food and agricultural products in the follow-up procedures. At present, the various purification columns used for this purification have simple internal adsorption packing components, such as only C18 , C8, NH2, CN, Si, Al or organic polymers, etc., this adsorption packing is suitable for the adsorption of one or a type of analyte, and is not suitable for multi-component processing. Therefore, the purification column and purification method of the prior art Long processing time, limited range of applications, high cost

Method used

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  • Column for purifying pesticide residue and purification method thereof
  • Column for purifying pesticide residue and purification method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Object to be inspected: spinach (green leafy vegetables)

[0043] Types of pesticide residues: organophosphorus pesticides

[0044] Purification column packing configuration: packing 300mg, of which activated carbon 10% (particle size 100μm), diatomaceous earth 75% (particle size 60μm), Celite 545 is 15% (particle size 10μm); the purification method includes the following steps:

[0045] The first step is to prepare the sample solution, and extract the analytes in spinach with 20ml of n-hexane and acetone (volume ratio 50:50) mixture;

[0046] The second step, activation purification column, with 20ml n-hexane and acetone (volume ratio 70: 30) mixed solution to flow through the purification column;

[0047] The third step, load the sample, add the spinach extract to the purification column, and dry it under negative pressure;

[0048] The fourth step, elution, use 10 ml of n-hexane and dichloromethane (volume ratio 50:50) mixture to flow through the purification colum...

Embodiment 2

[0052] Object to be inspected: pear (fruit)

[0053] Types of pesticide residues: organochlorine pesticides

[0054] Preparation of purification column packing, packing 90mg, wherein activated carbon 20% (particle size 100μm), diatomaceous earth 60% (particle size 60μm), Celite 545 is 20% (particle size 10μm); the purification method includes the following steps:

[0055] The first step is to prepare the sample solution, and extract the analyte in the pear with a mixture of 10ml of water and acetone (volume ratio 40:60);

[0056]The second step, activate the purification column, use 10ml of water and acetone (volume ratio 90:10) mixed solution to flow through the purification column;

[0057] The third step, loading the sample, adding the pear extract to the purification column;

[0058] The 4th step, washing, with 10ml of water and acetone (volume ratio 90: 10) mixed solution to flow through the purification column, suck dry under negative pressure;

[0059] The fifth step...

Embodiment 3

[0063] Object to be inspected: garlic

[0064] Types of pesticide residues: carbamate pesticides

[0065] Preparation of purification column packing: packing 150mg, of which activated carbon 25% (particle size 100μm), diatomite 50% (particle size 60μm), Celite 545 25% (particle size 10μm), the purification method includes the following steps:

[0066] The first step is to prepare a sample solution, and extract the analytes in garlic with a mixture of 15ml of n-hexane and dichloromethane (volume ratio 35:65);

[0067] In the second step, the purification column was activated, and a mixed solution of 15 ml of n-hexane and dichloromethane (volume ratio 35:65) was used to flow through the purification column.

[0068] The third step is to sample. The garlic extract was added to the purification column, flowed through, sucked dry under negative pressure, and the effluent was collected.

[0069] The liquid flow rate during the whole process does not exceed 4ml / min.

[0070] Anal...

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Abstract

The present invention relates to a pesticide residue cleaning column with mixed filler and its cleaning method. Said clenaing column includes external shell, upper screen plate, low screen plate and filler, the described upper screen plate is positioned in upper portion of the internal space of the external shell of the cleaning column, the lower screen plate is positioned in the bottom portion of external shell of the cleaning column, and the filler is positioned between upper and lower screen plates, and the composition of said filler includes (wt%) 1%-30% of active carbon, 40%-80% of diatomaceous earth and 15%-45% of filter aid, and the grain size range of said mixed filler is 5 micrometers-100 micrometers.

Description

technical field [0001] The invention relates to a chemical analysis process tower, in particular to a pesticide residue purification column equipped with mixed fillers and a purification method thereof. Background technique [0002] The purpose of purifying residual pesticides extracted from food is to accurately detect residual drugs and prohibited substances in food and agricultural products in subsequent procedures. Currently, the various purification columns used for this purification have simple internal adsorption fillers, such as only C18 , C8, NH2, CN, Si, Al or organic polymers, etc., this adsorption packing is suitable for the adsorption of one or a class of analytes, not suitable for multi-component treatment, so the purification column and purification method of the prior art The processing time is long, the scope of application is limited, and the cost is high. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to overcome these defects...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D15/00
Inventor 储晓刚张伟国彭涛李淑娟
Owner 中国进出口商品检验技术研究所
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