Determination Of MCPA Research Articles

Determination of MCPA in environmental samples using an analytical on-line system based on imprinted poly[2-(3-butenyl)-2-oxazoline] and ambient ionization mass spectrometry

Monitoring and quantifying organic chemicals in the environment play a vital role in understanding their behavior and ensuring environmental safety. MCPA (2-methyl-4-chlorophenoxyacetic acid) is a commonly used phenoxy herbicide that poses potential risks to aquatic life. In this study, we present an innovative analytical approach for MCPA quantification, employing molecularly imprinted polymers (MIPs) for selective extraction and ambient plasma mass spectrometry for direct on-line analysis. To synthesize functional MIPs, we employed a post-polymerization strategy based on a thiol-ene click reaction conducted on a short-chain poly[2-(3-butenyl)-2-oxazoline] (poly(ButenOx)) that allowed attachment of 3-mercaptopropionic acid (MPA) to polymer side chains. The incorporation of MPA groups into polymer structure enabled the attainment of elevated maximum adsorption capacities and enhanced selectivity towards MCPA. Utilizing a specially designed ambient plasma mass spectrometry setup, we successfully quantified MCPA in water samples, achieving significantly improved detection limits compared to conventional solution-based analysis, whereas the quantification of MCPA in real-life river water samples demonstrated excellent recoveries. In conclusion, this novel analytical method employing MIPs and ambient plasma mass spectrometry provides an effective and sensitive approach for accurate MCPA detection in environmental water samples. The technique holds promise for facilitating reliable monitoring and management of MCPA levels in aquatic ecosystems.

Derivatization and Determination of MCPA in Soil by GC

A reliable and sensitive method for determination of MCPA in soil by derivatization through p-toluenesulfonic acid and 1,3-dichloro-2-propanol followed by gas chromatographic detection under ECD mode has been established. After treatment with hydrochloric acid, the soil samples were directly extracted without any clean-up with dichloromethane by vortexing. After derivatization and liquid–liquid extraction, the product was subjected to GC analysis. Under optimized conditions, recovery of MCPA reached 87–91%; intra- and inter-day precision values were recorded in the range 3.4–6.4% and 7.4–8.7%, respectively. Excellent linear relationship was observed within 0.1–10 μg mL−1 (0.005–0.5 mg kg−1) with linear correlation coefficient (R) of 0.9997. The LOD and LOQ were 0.001 and 0.0026 mg kg−1, respectively, and the overall sensitivity for detection was found to be in the same range as with the conventional GC-MS technique.

Determination of MCPA through Electrocatalysis byManganese Species

Determination of MCPA through Electrocatalysis byManganese Species

Determination of MCPA, Bromoxynil, 2, 4-D, Trifluralin, Triallate, Picloram, and Diclofop-Methyl in Soil by GC-MS Using Selected Ion Monitoring

Abstract A double space extraction procedure was developed to simultaneously determine neutral herbicides (trifluralin, dlclofop- methyl, and triallate) and acid herbicides (MCPA, 2,4-D, bromoxynil, and picloram) in soil. The method uses capillary column gas chromatography (GC) and mass spectrometry (MS) detection with a high degree of confidence in the interpretation of herbicides in many soil types to the 0.003 ppm level. Detection limits at these low levels are possible because extracts can be concentrated by a factor of 50 with few coextractlve interferences evident in the chromatography. Recovery data are excellent for both groups of herbicides (81.5-97.8%, average); relative standard deviations vary from 15-23% because of a larger response variation using GC/MS detection.