Imidaclothiz (99.3%) was purchased from Dr. Ehrenstorfer GmgH (Augsburg, Germany). Methyl parathion (MP), chloramphenicol (CAP), and fenitrothion (FNT) were purchased from Sigma-Aldrich (Shanghai, China). Zn(NO3)2·6H2O and 2-methylimidazole, aniline, ammonium peroxydisulfate (APS), methanol, HCl, NaOH, Na2HPO4, KH2PO4, NaCl, KCl, FeCl3·6H2O, MgCl2, NH4Cl were purchased from Sinopharm Chemical Reagent Co., Ltd (Shanghai, China). The standard phosphate buffer solutions (0.1 M) with different pH values (from 5.0 to 9.0) were prepared by mixing KH2PO4 and Na2HPO4 and adjusting the pH by adding HCl or NaOH.
Methyl parathion
Manufactured by Merck Group
Sourced in United States, Germany
Methyl parathion is a chemical compound used as an insecticide and acaricide. It is a crystalline solid used in various agricultural and industrial applications. The core function of methyl parathion is to act as a pesticide, primarily targeting insects and mites.
Automatically generated - may contain errors
Lab products found in correlation
Chlorpyrifos, by Merck Group (6 mentions)
Malathion, by Merck Group (6 mentions)
Diazinon, by Merck Group (5 mentions)
Atrazine, by Merck Group (5 mentions)
Fenitrothion, by Merck Group (4 mentions)
Ethion, by Merck Group (4 mentions)
Methyl paraoxon, by Merck Group (4 mentions)
Sodium chloride (nacl), by Merck Group (3 mentions)
Disulfoton, by Merck Group (3 mentions)
Parathion, by Merck Group (3 mentions)
Simazine, by Merck Group (3 mentions)
Dimethoate, by Merck Group (3 mentions)
Carbofuran, by Merck Group (2 mentions)
Bovine serum albumin (bsa), by Merck Group (2 mentions)
Acetone, by Merck Group (2 mentions)
N hexane, by Merck Group (2 mentions)
Propazine, by Merck Group (2 mentions)
Acetone, by Thermo Fisher Scientific (2 mentions)
Trifloxystrobin, by Merck Group (2 mentions)
Glutaraldehyde, by Merck Group (2 mentions)
18 protocols using methyl parathion
1
Synthesis and Characterization of Imidaclothiz
2
Ultrasensitive Pesticide Detection Assay
3
Methyl Parathion Quantification Assay
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Hydrogen tetrachloroaurate (III) trihydrate (HAuCl4·3H2O), p-nitrophenol, and p-aminophenol were obtained from Alfa Aesar (Ward Hill, MA, USA). Methyl parathion (MP), potassium chloride, sodium perchlorate, sodium sulfate, and sodium chloride were purchased from Sigma-Aldrich (St. Louis, MO, USA). Stock solution of Methyl parathion (1000 ppm) was prepared in 20% acetonitrile and 0.1 M phosphate-buffered saline (PBS) for further experiments. Disodium hydrogenphosphate (Na2HPO4) and sodium dihydrogenphosphate anhydrous (NaH2PO4) were purchased from Showa Chemical Co., Ltd. (Tokyo, Japan). The deionized water (DI water) was produced by Milli-Q water purification system (Millipore, MA, USA). All chemicals were analytical grade and were used as received without further purification.
4
Pesticide Quantification Using Advanced Analytical Techniques
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The standards used were of the highest purity available (greater than or equal to 98%). Methyl parathion, ethoprophos, sulfotepp and chlorpyrifos were purchased from Sigma–Aldrich (Schnelldorf, Germany). Analytical grade reagents/chemicals were used. CA was obtained from Sigma–Aldrich (Pty.). Hydrochloric acid (37%), HPLC grade acetonitrile (99.9%), sodium hydroxide, N,N-dimethylformamide (DMF) and graphene oxide were from QReC (Selangor, Malaysia).
5
Pesticide Residue Analysis Protocol
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A cocktail mix containing 8 OP residues (dichlorvos), MOCAP (ethoprophos), disulfoton, methyl parathion, Ronnel, Dursban (Chlorpyrifos), guthion (azinphos methyl), and Tokuthion and a standard mix of 10 CB residues (aldicarb sulfoxide), aldicarb sulfone, oxamyl, methomyl, 3-hydroxycarbofuran, aldicarb, propoxur, carbofuran, Sevin (carbaryl), and methiocarb were purchased from Sigma-Aldrich, USA. Other chemicals including n-hexane, ethyl acetate, acetone, sodium chloride, and anhydrous sodium sulphate were brought from Sigma Aldrich, Germany.
6
Pesticide Determination in Fruit Matrices
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Standards of the pesticides carbofuran (CF), carbaryl (CAR), atrazine (ATZ), ametryn (AME), and methyl parathion (MeP), all with purity > 98%, acetic acid, acetonitrile, and methanol, all HPLC grade, were obtained from Sigma-Aldrich (St. Louis, MO, USA). Helium (99.999% purity) was supplied by Praxair (Colima, México). A methanol stock solution of each pesticide at 50 mg/L was weekly prepared. methanolic working solutions were prepared daily by mixing pesticide stock solutions. These solutions were stored in the dark at 4°C. Working solutions were used for GC–MS method optimization and spiking fruit matrices used for method validation. Other chemicals used in this work were analytical reagent grade.
DisQuE Dispersive Sample Preparation kit containing extraction and clean-up tubes from Waters (Milford, MA, USA) and nylon filters (0.45 μm pore size) from Phenomenex (Torrance, CA, USA) were used for sample preparation.
DisQuE Dispersive Sample Preparation kit containing extraction and clean-up tubes from Waters (Milford, MA, USA) and nylon filters (0.45 μm pore size) from Phenomenex (Torrance, CA, USA) were used for sample preparation.
7
Comprehensive Analysis of Pesticide Residues
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CRM for organochlorine pesticides comprised a mixture of 20 compounds viz. α-BHC, β-BHC, γ-BHC, Δ-BHC, heptachlor, Aldrin, heptachlor epoxide, trans-chlordane, cis-chlordane, endosulfan-I, endosulfan-II, endosulfan sulfate, 4,4′-DDE, 4,4′-DDD, 4,4′-DDT, dieldrin, endrin, endrin aldehyde, endrin ketone and methoxychlor; a herbicide mix of 5 compounds viz. atrazine, simazine, alachlor, metolachlor and butachlor and were procured from Sigma Aldrich (USA).
Individual standards for hexachlorobenzene, and several organophosphate pesticides including ethion, disulfoton, malaoxon, fenthion, phosalone, methyl parathion, methyl chlorpyrifos, ethyl parathion, fenitrothion, propazine and methyl paraoxon, were all procured from Sigma Aldrich (USA). Standards for malathion, acephate, phosphamidon, captafol, diazinon and monocrotophos were procured from Accustandard, Inc. (USA). A mixture of pyrethroid compounds including Cyfluthrin, L-cyhalothrin, cypermethrin-I, cypermethrin-II, cypermethrin-III, deltamethrin, pendimethalin, permethrin-I, permethrin-II, fenvalerate, and tefluthrin were also purchased from Accustandard, Inc. (USA).
Individual standards for hexachlorobenzene, and several organophosphate pesticides including ethion, disulfoton, malaoxon, fenthion, phosalone, methyl parathion, methyl chlorpyrifos, ethyl parathion, fenitrothion, propazine and methyl paraoxon, were all procured from Sigma Aldrich (USA). Standards for malathion, acephate, phosphamidon, captafol, diazinon and monocrotophos were procured from Accustandard, Inc. (USA). A mixture of pyrethroid compounds including Cyfluthrin, L-cyhalothrin, cypermethrin-I, cypermethrin-II, cypermethrin-III, deltamethrin, pendimethalin, permethrin-I, permethrin-II, fenvalerate, and tefluthrin were also purchased from Accustandard, Inc. (USA).
8
Electrochemical Biosensor for Pesticide Detection
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Acetylcholinesterase from electrophorus electricus (electric eel), acetyl thiocholine chloride (ATCl), chlorpyrifos (CPF), methyl parathion (MP), aniline, and oxalic acid were purchased from Sigma Aldrich. MWCNTs were purchased from Carbolex Inc. Ltd. US. Sodium chloride (NaCl), monobasic (NaH 2 PO 4 •2H 2 O), dibasic (Na 2 HPO 4 ), potassium ferri hexa cyanide K 3 [Fe(CN) 6 ], potassium ferro hexa cyanide K 4 [Fe(CN) 6 ], sulphuric acid (H 2 SO 4 ), nitric acid (HNO 3 ), and acetone were purchased from Fisher Scientific. Ethanol was purchased from Merck. All experiments were performed using Milli-Q Deionized (D.I) water having resistance 18.2 MΩ and analytical grade chemicals. ITO coated glass was purchased from TECHINSTRO, India (working area-1 cm × 1 cm, resistivity of ~10 Ω/cm).
9
Pesticide Standards for Analytical Methods
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Diazinon, methyl-parathion, fenitrotion, malathion, chlorpyrifos, triadimephon, penconazole, imazalil, myclobutanil, ethion, trifloxystrobin, propiconazole, bromopropylate, lindane, endosulfan, aldrin, heptachlor epoxide A, trans-chlordane, dieldrin, endrin, p,p′-DDT, and p,p′-DDD standards of high purity (>98%) were supplied by Sigma-Aldrich (Seelze, Germany). The stock solutions (1 g l -1 ) were prepared by dissolving the standards in methanol HPLC grade (99.9%) from Sintorgan (Buenos Aires, Argentina) and stored under freezing condition (-18 °C) in dark bottles sealed with PTFE/silicone caps. The working standard solutions (50 mg l -1 ) were prepared in hexane HPLC grade (99.9%) purchased by Sintorgan (Buenos Aires, Argentina). Deionized water obtained from an E-pure water purification system (Barnstead/Thermolyne, Bedford, MA, USA) was used for physical-chemical analysis.
10
Pesticide Mixture Analysis Protocol
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Pesticide mixtures, including triazines, organophosphorus pesticides (OPPs), and carbamates in acetonitrile (ACN), were purchased from AccuStandard (New Haven, CT, USA). Pure standards of chlorophenols, trifluralin, and methyl parathion were obtained from Sigma-Aldrich (Oakville, ON, Canada). Internal standards, including 3,5-dichlorophenol-d3, trifluralin-d14 and metolachlor-d6, were prepared from stock solutions sourced from CDN Isotopes (Pointe-Claire, QC, Canada). DVB particles (5 µm diameter) and high-density PLOT PDMS, used in the preparation of the membrane, were obtained from Supelco (Bellefonte, PA, U.S.A). Nanopure water was sourced from a Barnstead/Thermodyne Nanopure ultra-pure water system (Type 1 water grade) for method development. A mixture of standards at different concentrations was prepared in ACN by diluting stock solutions for preliminary experiments, method development, and preparation of calibration levels. Properties of the selected pesticides are provided in Table S1 of Supporting Information.
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