Determination of herbicide pyraclonil residue in rice, soil and water using high-performance liquid chromatography/tandem mass spectrometry

Hu, Mingfeng; Chen, Wuying; Liu, Yong; Zhang, Deyong; Chen, Ang; Liu, Jianyu; Luo, Xuemei; Yan, Qingping

doi:10.1039/c7ay01483j

Cited by 9 publications

(5 citation statements)

References 17 publications

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“…Acetochlor and butachlor analysis have been primarily performed on GC [32], HPLC [21], and GC-MS [33]. HPLC-MS/MS and GC-MS have higher sensitivity and precision and lower detection limits than traditional methods at trace levels in various matrices [34,35]. In addition, the combination of QuEChERS and mass spectrometry has been considered as the most sensitive, rapid, and reliable method for pesticide residue analysis in different matrices.…”

Section: Introductionmentioning

confidence: 99%

Dissipation Dynamics and Residue of Four Herbicides in Paddy Fields Using HPLC-MS/MS and GC-MS

Qian

Zhang

et al. 2019

IJERPH

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The dissipation dynamics and residue of pyrazosulfuron-ethyl, bensulfuron-methyl, acetochlor, and butachlor in paddy fields at Good Agricultural Practices (GAP) condition were carefully investigated in this study. The four herbicides’ residues were determined based on a quick, easy, cheap, rugged, safe (QuEChERS) method coupled with HPLC-MS/MS and GC-MS. The limit of detection (LOD) for pyrazosulfuron-ethyl, bensulfuron-methyl, acetochlor, and butachlor in all matrices ranged from 0.04–1.0 ng. The limit of quantification (LOQ) of the four herbicides ranged from 0.01–0.1 mg/kg. Moreover, the average recoveries of the four herbicides ranged from 78.9–108% with relative standard deviations (RSDs) less than 15% at three different fortified levels for different matrices. The dissipation results indicated that the average half-lives (t1/2) of the four herbicides in soil were in the range of 3.5–17.8 days, and more than 95% of the four herbicides dissipated within 5 days in water. Furthermore, the final residues of the four herbicides were all below the LOQ at harvest time. Such results highlight the dissipation dynamics and residue of the four herbicides in a rice cropping system and contribute to risk assessment as well as scientific guidance on the proper and safe application of herbicides in paddy fields.

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Section: Introductionmentioning

confidence: 99%

Dissipation Dynamics and Residue of Four Herbicides in Paddy Fields Using HPLC-MS/MS and GC-MS

Qian

Zhang

et al. 2019

IJERPH

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“…Due to the large and excessive use of herbicides, the problem of herbicide residues is gaining increasing attention. HPLC/MS is a routine method to determine the residue of herbicides in agrifoods and the environment . In a recent work, we tried to develop a quantitative method using UHPLC/MS to determine three herbicides (metolachlor, flufenacet and napropamide) in tea.…”

Section: Resultsmentioning

confidence: 99%

“…HPLC/MS is a routine method to determine the residue of herbicides in agrifoods and the environment. [11][12][13][14] In a recent work, we tried to develop a quantitative method using UHPLC/MS to determine three herbicides (metolachlor, flufenacet and napropamide) in tea. As we know, matrix components of a sample usually negatively affect the analytical measurement of the target compound in HPLC/MS, the so-called matrix effect.…”

Section: Observation Of the Interferencesmentioning

confidence: 99%

Identification of new interferences leached from plastic microcentrifuge tubes in electrospray ionization mass spectrometry

Chai

Chen

Gao

et al. 2019

Rapid Comm Mass Spectrometry

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Rationale The incredible sensitivity of the modern mass spectrometry instrument enables scientists to detect a large number of molecules ranging from small organic compounds to biological macromolecules. However, the same sensitivity often throws up challenges with respect to background interferences and contaminants. The identification and source of these contaminants is very important for reducing background contamination and ensuring the accuracy of the analysis results. Methods The interfering compounds were analyzed by high‐performance liquid chromatography coupled with a hybrid quadrupole‐orbitrap mass spectrometer. The structural analysis was conducted by obtaining the accurate masses of precursors and their fragment ions. The retention time and MS/MS spectrum of one of the interfering compounds (N‐lauryldiethanolamine) were compared with an authentic standard to reach an unequivocal structural assignment. Results The interferences (m/z 274 and 318 in positive mode) were observed during the analysis of herbicides in tea samples by electrospray ionization mass spectrometry (ESI‐MS). Their structures were identified to be N‐lauryldiethanolamine and N‐(2‐hydroxyethyl)‐N‐(2‐(2‐hydroxyethoxy)ethyl)dodecylamine by fragmentation interpretation and further confirmed by a standard compound. These interferences were found to be leached from the plastic microcentrifuge tubes used during sample pretreatment. The plastic tubes from two of the five suppliers tested were found to contain these two interferences. Conclusions In this work, we presented an example about the observation, identification and source of interferences in ESI‐MS. The N‐lauryldiethanolamine and other ethoxylated aliphatic alkylamines are common plastic antistatic agents. They possess high proton affinity so that they show a strong response in ESI positive mode. In order to avoid their interference during mass spectrometric analysis we need to choose plastic tubes (or other plastic materials) that do not contain such antistatic agents.

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“…Pathways for the metabolism of acetochlor in various crops (e.g., maize, soybeans, and cotton) have been worked out, and 2-ethyl-6-methylaniline (EMA) (Figure c) was reported to be the major aniline metabolite of acetochlor in corn and soybeans. Several studies have reported on the determination of metribuzin and acetochlor in wheat, corn, paddy, tomatoes, and soil, − few reports described the detection of EMA in corn or soybeans, despite that EMA has been required to be taken into estimation considering its toxicological significance…”

Section: Introductionmentioning

confidence: 99%

Residues and Dietary Risk Assessments of 2,4-D Isooctyl Ester, Metribuzin, Acetochlor, and 2-Ethyl-6-methylaniline in Corn or Soybean Fields

Zheng

Liu

2020

J. Agric. Food Chem.

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Since 2,4-dichlorophenoxy acetic acid (2,4-D) was discovered in the 1940s, 2,4-D and its derivatives remain among most commonly used herbicides in the world. There have been recent increases in using 2,4-D products in a combination with other herbicides such as metribuzin and acetochlor to control noxious weeds. However, accurate analysis of 2,4-D isooctyl ester remains to be improved due to long analysis time and rapid conversion of the ester to acid (i.e., under-reporting residues). In this work, a simple hydrolysis procedure was introduced to provide a quantitative hydrolytic rate of the ester (>95%) and did not affect the other pH-sensitive compounds. Analysis parameters and sample pretreatments were optimized for improved selectivity and accuracy. The hydrolysis-QuEChERS (quick, easy, cheap, effective, rugged, and safe) technique for multidetermination of 2,4-D isooctyl ester, metribuzin, acetochlor, and 2-ethyl-6-methylaniline in corn and soybeans via high performance liquid chromatography–tandem mass spectrometry was established. The method had average recoveries of 74–109% with relative standard deviations ≤13.5% and limits of quantifications (LOQs) of 0.05 mg/kg. The terminal residues of these compounds found in real edible matrixes were less than the corresponding LOQs at harvest time. The risk quotients were far below 100%, indicating a low health risk to consumers.

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Determination of herbicide pyraclonil residue in rice, soil and water using high-performance liquid chromatography/tandem mass spectrometry

Abstract: A quick, reliable and sensitive analytical method for the confirmation and quantification of pyraclonil was developed using high-performance liquid chromatography/tandem mass spectrometry (HPLC-MS/MS) with an electrospray ionization source (ESI) in positive mode.

Cited by 9 publications

References 17 publications

Dissipation Dynamics and Residue of Four Herbicides in Paddy Fields Using HPLC-MS/MS and GC-MS

Dissipation Dynamics and Residue of Four Herbicides in Paddy Fields Using HPLC-MS/MS and GC-MS

Identification of new interferences leached from plastic microcentrifuge tubes in electrospray ionization mass spectrometry

Residues and Dietary Risk Assessments of 2,4-D Isooctyl Ester, Metribuzin, Acetochlor, and 2-Ethyl-6-methylaniline in Corn or Soybean Fields

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