Capillary electrophoretic analysis method for trace detection of phenazine-1-carboxylic acid
A technology of capillary electrophoresis and analysis method, which is applied in the field of capillary electrophoresis analysis for micro-detection of phenazine-1-carboxylic acid, which can solve the problems of few pesticide residues and achieve the effects of lower detection limit, higher precision, and accurate and simple method
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0016] (1) Equipment and raw materials
[0017] Beijing Binda 1229—high-efficiency capillary electrophoresis analyzer (with UV monitor), Nanjing Qianpu HW-2000 chromatographic workstation, quartz capillary column with an inner diameter of 50-100 μm and a length of 30-70 cm (Hebei Yongnian Optical Fiber Factory).
[0018] Methanol (HPLC grade), triple distilled water (conductivity 0.082μS / cm)
[0019] (2) Preparation of phenazine-1-carboxylic acid crystals
[0020] 1. Acidify the fermentation broth fermented by Pseudomonas M18 with 1.0M HCl to pH=2.0, mix the treated fermentation broth with 3 times the volume of chloroform, shake and extract, centrifuge at 3000×g for 20 minutes, and take the organic The phase was evaporated to dryness to obtain the crude extract of phenazine-1-carboxylic acid.
[0021] 2. The crude extract of phenazine-1-carboxylic acid is subjected to silica gel column chromatography with chloroform as the eluent, and a bottle is collected every 30 minutes, ...
Embodiment 2
[0033] Example 2: Determination of phenazine-1-carboxylic acid in fermentation broth.
[0034] Take 180 μL of Pseudomonas M18 fermentation broth after 10 h of fermentation, and add 1M HCl to adjust the pH value to 2.0. Mix the treated fermentation broth with 540 μL of chloroform, shake and extract, centrifuge at 12000×g for 5 minutes, take out 500 μL of organic phase and vacuum-dry it, and finally dissolve it in 500 μL of methanol solution containing 200 μg / mL phenazine, and mix well.
[0035] Under the following conditions: separation voltage 20kV, detection wavelength 254nm buffer, column temperature: 25°C, 10mM pH6.6 phosphate buffer, 20cm height differential pressure injection for 75s, capillary inner diameter 75μm, length 59cm, capillary electrophoresis analysis, measured The concentration of phenazine-1-carboxylic acid in the 10h Pseudomonas M18 fermentation broth was 26.81 μg / mL.
Embodiment 3
[0036] Example 3: Determination of phenazine-1-carboxylic acid residues in soil.
[0037] Evenly apply 1 mL of phenazine-1-carboxylic acid methanol solution with a concentration of 1.5 μg / mL in 25 g of soil, that is, the application concentration is 0.30 mg / kg, and the treated soil is ultrasonically extracted with 100 mL of dichloromethane, and the extract After performing solid phase extraction, collect the solid phase extraction eluate, concentrate to dryness, and obtain the sample to be tested after vacuum drying.
[0038] The sample to be tested was dissolved in 5mL methanol, and filtered through a 46 μm filter membrane, and the filtrate was analyzed under the electrophoresis conditions in Example 1, and the concentration of phenazine-1-carboxylic acid in the extract could be measured to be 1.385 μg / mL, the recovery rate of this extraction was 92.35%.
PUM
Property | Measurement | Unit |
---|---|---|
length | aaaaa | aaaaa |
electrical conductivity | aaaaa | aaaaa |
wavelength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com