Method for extracting and detecting prednisolone, aldosterone, testosterone and estradiol in Euphausia superba

A technology of Antarctic krill and prednisolone, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of short separation time, high detection limit, and expensive instruments, and achieve sufficient extraction, less impurities, and short time-consuming Effect

Active Publication Date: 2018-12-18
SHANDONG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the above substances, prednisolone and estradiol can be detected by radioimmunoassay, gas chromatography-mass spectrometry, high-performance liquid chromatography-mass spectrometry, ELISA, thin-layer chromatography, etc.; Complicated, expensive instruments are required, and silane methylation or acetylation reactions are required to convert volatile components into volatile components for GC-MS determination. ELISA has high sensitivity, but the method has high false positives and can only be used qualitatively Preli

Method used

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  • Method for extracting and detecting prednisolone, aldosterone, testosterone and estradiol in Euphausia superba
  • Method for extracting and detecting prednisolone, aldosterone, testosterone and estradiol in Euphausia superba
  • Method for extracting and detecting prednisolone, aldosterone, testosterone and estradiol in Euphausia superba

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Embodiment 1

[0050] Embodiment 1: Exploration of ultra-high performance liquid chromatography-mass spectrometry conditions

[0051] The selection of the ultra-high performance liquid chromatography condition in the present invention has investigated methyl alcohol, water; Methyl alcohol, acetonitrile; Methyl alcohol, the elution effect of formic acid water as eluent, methyl alcohol, the separation effect of water is not good, adopts methyl alcohol, acetonitrile afterwards as flowing It was found that almost all hormones peaked within 3 minutes, and they were difficult to separate. Afterwards, methanol and 0.1% formic acid water were used as the mobile phase, and it was found that a gradient separation effect was not good. After continuously adjusting the mobile phase, it was found that methanol and 0.1 % formic acid water adopts the effect of gradient separation to be better, and can completely elute the peak within 9min, finally determined as the mobile phase of detecting prednisolone, ald...

Embodiment 2

[0059] Implementation Example 2: Optimal Screening of Extraction Conditions

[0060] 1. Optimal screening of extraction solvents

[0061] Take 10g of fresh Antarctic krill and freeze-dry it at -40°C. Freeze-dried Antarctic krill were ground and pulverized with a high-speed tissue grinder. Add 12mL concentration 2.0mol L -1 Add 50 μL of β-glucuronidase (10000 U / mL) to acetic acid-sodium acetate buffer solution (PH=5.2), and perform enzymatic hydrolysis in a constant temperature shaker at 37°C for 12 hours. Take out the sample and cool it to room temperature, add 10mL of extraction solvent, vortex extract for 2min, take the supernatant, repeat the extraction 3 times, and combine the supernatant. Extract with QuEChERS solid-phase extraction column, vortex for 2min to purify, centrifuge at 4000r / min for 5min, and take the supernatant. Rotary evaporate to dryness, the rotary evaporation temperature is 50°C, reconstitute with 1mL extraction solvent, and pass through a 0.2μm filt...

Embodiment 3

[0080] Take 10g of fresh Antarctic krill and freeze-dry it at -40°C. Freeze-dried Antarctic krill were ground and pulverized with a high-speed tissue grinder. Add 12mL concentration 2.0mol L -1 Add 50 μL of β-glucuronidase (10000 U / mL) to acetic acid-sodium acetate buffer solution (PH=5.2), and perform enzymatic hydrolysis in a constant temperature shaker at 37°C for 12 hours. Take out the sample and cool it to room temperature, add 10mL of acetonitrile, vortex extract for 2min, take the supernatant, repeat the extraction 3 times, and combine the supernatant. Extract with QuEChERS solid-phase extraction column, vortex for 2min to purify, centrifuge at 4000r / min for 5min, and take the supernatant. Rotary evaporate to dryness at 50°C, redissolve with 1 mL of acetonitrile, and pass through a 0.2 μm filter membrane. Obtain the crude extract of prednisolone from Antarctic krill. Take 10 μL of the bold matter and use the ultra-high performance liquid chromatography mass spectrom...

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Abstract

The invention discloses a method for extracting and detecting prednisolone, aldosterone, testosterone and estradiol in Euphausia superb. The method comprises the steps of lyophilizing fresh Euphausiasuperb at 10-50 DEG C and then crushing the Euphausia superb; adding an acetic acid-sodium acetate buffer solution and a beta-glucuronidase to the crushed Euphausia superb to enzymatically hydrolyze;adding an acetonitrile or an ethyl acetate to an enzymatically hydrolyzed sample to extract in a vortex manner, extracting repeatedly for 3-4 times and merging supernates; performing extraction treatment by using a QuEChERS solid phase extraction column, purifying in a vortex manner, rotationally evaporating to be dry, redissolving by using the acetonitrile or the ethyl acetate, filtering by a 0.2[u]m filter membrane to obtain an extract of the prednisolone, the aldosterone, the testosterone and the estradiol in the Euphausia superb; and detecting with combined use of an ultra-high performance liquid chromatography-mass spectrography. According to the method provided by the invention, the operation in an extraction process is simple, and the consuming time is short; moreover, impurities affecting the detection can be fully removed; and therefore, the method is a method which is simple, feasible, short in the consumed time and high in an extraction rate.

Description

technical field [0001] The invention relates to an efficient extraction method of prednisolone, aldosterone, testosterone and estradiol in Antarctic krill and an ultra-high performance liquid chromatography-mass spectrometry detection method, belonging to the technical fields of medicine, food and chemical industry. Background technique [0002] Prednisolone, molecular formula C 21 h 28 o 5 , molecular weight is 360.44, density is 1.31g / cm 3 , with a melting point of 240°C and a boiling point of 570.6°C at 760mmHg. This product is white or off-white crystalline powder; odorless, slightly bitter taste; hygroscopic. It is mainly used for allergic and autoimmune inflammatory diseases, collagen diseases, such as rheumatism, rheumatoid arthritis, lupus erythematosus, severe bronchial asthma, nephrotic syndrome, thrombocytopenic purpura, neutropenia, acute lymphoid Leukemia, various adrenal insufficiency, exfoliative dermatitis, pemphigus, neurodermatitis, eczema, etc. Aldos...

Claims

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Application Information

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IPC IPC(8): G01N30/06G01N30/02
CPCG01N30/02G01N30/06G01N2030/062
Inventor 韩香凝刘代成
Owner SHANDONG NORMAL UNIV
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