Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for detecting N-methyl carbamate pesticide residues

A technology for methyl carbamic acid and pesticide residues, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of difficult promotion, expensive instruments, cumbersome operation, etc., and achieve easy popularization and application, high instrument penetration rate, and enhanced recovery rate Effect

Inactive Publication Date: 2014-07-16
TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented device helps detect harmful chemical substances from polluted waters by analyzing them with special techniques like gaschrometry or ion mobility spectrometer (IMS). It has several technical benefits such as cost efficiency, safety, ease of use for analysis purposes, ability to measure low levels of these compounds quickly without adding any new components during sampling processes, and being able to analyze samples faster than current methods while maintain their accuracy over longer periods.

Problems solved by technology

This patented technical solution describes different ways to extract certain chemical substances (pesticids) from water sources like streams, lakes, ponds, soil, crop lands, and surface environments without affecting their quality or harmfulness. These techniques involve complex operations involving multiple components including organic acid esters, nitrogen bases, amines, alcohol chloroformates, pyridine dicamba, cyclohexanedione monosodium salt, phthorodsulfonimmediators, and others.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Water sample pretreatment: sequentially infiltrate and activate the C18 solid phase extraction cartridge with 5 mL methanol and 5 mL ultrapure water for use. Take the water sample to be analyzed at 1mL·min -1 Load the sample at a high speed and enrich it by a C18 solid phase extraction cartridge. After all the water samples are drawn, rinse with 3mL ultrapure water, and then continue to pump and dry under vacuum for 30 minutes. Use 1mL methanol to reduce the pressure to 1mL·min -1 Speed ​​elution C18 solid phase extraction cartridge, and collect the eluate. After drying the eluent with nitrogen at 20°C, dilute to 1.0 mL with methanol and wait for chromatographic analysis.

[0033] Preparation of standard series of N-methyl carbamate pesticide residue solutions: Weigh 0.00100g solid samples of sulfacarb, isoprocarb, dimethocarb and f-bucarb, dilute to 1 mL with methanol, and prepare the respective concentrations 1000mg·L -1 Standard mixed use liquid of sulfacarb, isoprocarb...

Embodiment 2

[0038] Water sample pretreatment: sequentially infiltrate and activate the Oasis HLB solid phase extraction cartridge with 5 mL methanol and 5 mL ultrapure water for use. Take the water sample to be analyzed to 2mL·min -1 Load the sample at a high speed, enrich it with an Oasis HLB solid phase extraction cartridge. After all the water samples are drawn, rinse with 3mL ultrapure water, and then continue to pump and dry under vacuum for 30 minutes, with 3mL methanol / acetonitrile (V / V)= 1 / 1 at 2mL·min -1 Speed ​​elution Oasis HLB solid phase extraction cartridge, and collect the eluate. After drying the eluent with nitrogen at 30°C, dilute to 1.0 mL with methanol and wait for chromatographic analysis.

[0039] Preparation of standard series of N-methyl carbamate pesticide residue solutions: Weigh 0.00100g solid samples of sulfacarb, isoprocarb, dimethocarb and f-bucarb, dilute to 1 mL with methanol, and prepare the respective concentrations 1000mg·L -1 Standard mixed use liquid of ...

Embodiment 3

[0044] Water sample pretreatment: sequentially infiltrate and activate the amino solid phase extraction cartridge with 5 mL methanol and 5 mL ultrapure water, and set aside. Take the water sample to be analyzed at 3mL·min -1 Load the sample at a high speed and enrich it by an amino solid phase extraction cartridge. After all the water samples are drawn, rinse with 3mL ultrapure water, and then continue to pump and dry under vacuum for 30 minutes, with 4mL methanol / acetonitrile (V / V)=1 / 1 to 3mL·min -1 Speed ​​elution amino solid phase extraction cartridge, and collect the eluate. After drying the eluent with nitrogen at 40°C, dilute to 1.0 mL with methanol and wait for chromatographic analysis.

[0045] Preparation of standard series of N-methyl carbamate pesticide residue solutions: Weigh 0.00100g solid samples of sulfacarb, isoprocarb, dimethocarb and f-bucarb, dilute to 1 mL with methanol, and prepare the respective concentrations 1000mg·L -1 Standard mixed use liquid of sulf...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for detecting N-methyl carbamate pesticide residues. The method includes treating a water sample by means of extracting solid in advance; preparing a series of mixed methanol standard solutions of the N-methyl carbamate pesticide residues; analyzing the standard solutions by an ultra-fast chromatographic ultraviolet detector, and drawing a standard curve by using mass concentrations of the standard solutions as horizontal coordinates and peak areas of the standard solutions as vertical coordinates to obtain a standard curvilinear regression equation; and analyzing the water sample to be analyzed by the ultra-fast chromatographic ultraviolet detector and respectively computing mass concentrations of the N-methyl carbamate pesticide residues in the water sample to be analyzed according to the peak areas. By the aid of the method, a gap in the technology for detecting the N-methyl carbamate pesticide residues in environmental water is filled, mass concentrations of trace metolcarb, isoprocarb, diethofencarb and fenobucarb can be obtained simultaneously by one-step detection, and the method has the advantages of simplicity, capability of saving time, sensitivity and high efficiency. In addition, the ultra-fast liquid chromatographic ultraviolet detection method is universal and is popularized and applied easily.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Owner TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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