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6 protocols using pyraclostrobin

1

Immunoassay Reagent Acquisition Protocol

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Picoxystrobin standards and 6-bromohexanoic acid (≥99%) were purchased from McLean Biochemical Co., Ltd. (Shanghai, China). Fluoxastrobin (≥98%), imazalil (≥98%), azoxystrobin (≥98%), cyproconazole (≥98%), dimoxystrobin (≥98%), pyraclostrobin (≥98%), and kresoxim-methyl (≥98%) were acquired from Dr. Ehrenstorfer (Augsburg, Germany). Bovine serum albumin (BSA), ovalbumin (OVA), keyhole limpet hemocyanin (KLH), lactoferrin (LF), goat anti-mouse IgG, horseradish peroxidase (HRP)-labeled goat anti-mouse IgG, 2-(N-Morpholino) ethanesulfonic acid (MES), tris (hydroxymethyl)aminomethane, and complete and incomplete Freund’s adjuvants were obtained from Sigma-Aldrich (St. Louis, MO, USA). N-hydroxysuccinimide (NHS, 99%), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (EDC, 99%), and N,N-dimethylformamide (DMF) were purchased from Aladdin Chemistry Co., Ltd. (Shanghai, China). Time-resolved fluorescence microspheres (1% (w/v) solid suspension) were sourced from Bangs Laboratories, Inc. (Fishers, IN, USA). PSA and C18 purchased from Yuexu Technology Co., Ltd. (Shanghai, China). All the other conventional reagents and chemicals were of analytical grade or higher.
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2

Pesticide and Heavy Metal Analysis Protocol

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All pesticides standards including α-BHC(100 mg L−1), β-BHC (100 mg L−1), γ-BHC (100 mg L−1), δ-BHC (100 mg L−1), p,p′-DDE (100 mg L−1), o,p′-DDT (100 mg L−1), p,p′-DDT (100 mg L−1), p,p′-DDD (100 mg L−1), azoxystrobin (99.0%), carbendazim (99.0%), chlorothalonil (98.9%), chlorpyrifos (99.5%), cypermethrin (98.2%), chlorantraniliprole (98.2%), dichlorvos (99.7%), difenoconazole (99.2%), fenpropathrin (98.9%), isocarbophos (98.9%), procymidone (99.5%), prochloraz (99.2%), pyraclostrobin (98.1%), thiophanate-methyl (99.3%), tebuconazole (99.5%) and λ-cyhalothrin (93.5%) were purchased from Dr Ehrenstorfer GmbH (Augsburg, Germany). Acetonitrile (HPLC grade) were provided by Bangyi Chemical Co., Ltd. (Hangzhou, China). Anhydrous magnesium sulphate, anhydrous sodium sulphate and n-hexane were of analytical grade. Primary secondary amine (PSA) was provided by Agela Technologies.
Each single element stock solution (1000 mg L−1) of Cu, Zn, Cr, Ni, Pb, As, Cd, and Hg were purchased from National Standard Material Research Centre (Beijing, China). Guaranteed reagent nitric acid (HNO3) was provided by Fanhong Trading Co., Ltd. (Guangzhou, China).
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3

Certified Pesticide Standards for Quantitative Analysis

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Certified standards of pesticides (dimethomorph, fenhexamid, iprovalicarb, metrafenone, pyraclostrobin, quinoxyfen, spiroxamine, tebuconazole and triadimenol) were purchased from Dr. Ehrenstorfer GmbH (Augsburg, Germany), Honeywell Fluka TM or Honeywell Riedelde Haen TM (both Seelze, Germany). The purity of standards was in the range of 98-99.9 %.
The internal standards for triphenyl phosphate (TPP) and nicarbazin were obtained from Sigma-Aldrich (St. Louis, Missouri, USA). Individual pesticides' stock solutions were prepared in pure Methanol, acetonitrile or acetone containing 1 % formic acid (v/v), depending on the solubility of the specific pesticide. A composite stock standard in acetonitrile was prepared at 50 000 ng•mL -1 from stock solutions and was stored at -18 °C. The working standard mixtures (20-2000 ng•mL -1 ) used for matrix-matched calibration were prepared from stock solution by further dilution with acetonitrile.
HPLC-grade acetonitrile, LC-MS-grade formic acid, ammonium formate and ammonium acetate were obtained from Sigma-Aldrich. Methanol was obtained from Merck (Darmstadt, Germany). Acetone and sodium chloride were obtained from Penta (Chrudim, Czech Republic). Anhydrous magnesium sulfate was obtained from Honeywell Fluka TM . Deionised water (18 MΩ) was produced, using a Millipore Milli-Q system (Bedford, USA).
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4

Synthesis of Fluorescent Bodipy Compounds

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Lithium chloride (99%), triethylamine (TEA)
(99%), 1,3,5,7-tetramethyl-8-phenyl-4,4-difluoroboradiazaindacene
(Bodipy 326/515), methacrylic anhydride (95%), sodium dodecylsulfate
(SDS, 99%), 2-chloro-4,4,5,5-tetramethyl-1,3,2-dioxaphospholane (95%),
prothioconazole (analytical standard), endo-N-hydroxy-5-norbornene-2,3-dicarboximide (98%), chrome(III)acetylacetonate
(97%), 2,2′-(ethylenedioxy)bis(ethylthiol) (EDBET, 95%), KL
(alkaline product number: 370959), LSCa (lignin sulfonic acid calcium
salt, product number: 47054), LSCH (sugared lignin sulfonic acid sodium
salt, product number: 47011), and LSNa2 (lignin sulfonic acid sodium
salt, product number: 471038) were obtained from Sigma-Aldrich. LSNa1
(lignin sulfonic acid sodium salt, product number: 8999-1) was bought
from Carl Roth and LSNa3 (lignin sulfonic acid sodium salt, product
number: L0098) was a product of TCI Chemicals. OL (product number:
CP8068-03-9) was obtained from Chemical Point. Pyraclostrobin was
purchased from Toronto Research Chemicals. Rapeseed oil produced from
Rapso was used.
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5

Xylan Extraction and Polymer Synthesis

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Xylan from corncobs (Art. 8659.2) and beechwood (Art. 4414.2) was obtained from Carl Roth. Toluene diisocyanate (TDI) (98%), sodium dodecylsulfate (99.9%), 2‐chloro‐4,4,5,5‐tetramethyl‐1,3,2‐dioxaphospholane (95%) and endo‐N‐hydroxy‐5‐norbornene‐2,3‐dicarboximide (98%) were purchased from Sigma Aldrich. Pyraclostrobin was bought from Toronto Research Chemicals. All materials were used without further purification. Poly[(ethylene‐co‐butylene)‐b‐(ethylene oxide)] (=P[E/B‐b‐EO]) consisted of a poly(ethylene‐co‐butylene) block with a molecular weight of (Mw = 3700 g/mol) and poly(ethylene oxide) block of (Mw = 3600 g/mol). The surfactant was synthesized according to the protocol of Schlaad et al.[16]
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6

Pesticide Residue Analysis in Apples

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Glyphosate, fenbuconazole and boscalid (≥98% purity) PESTANAL analytical standards were obtained from Sigma Aldrich (Oakville, ON, Canada). Pyraclostrobin was obtained from Toronto Research Chemicals (Toronto, ON, Canada). HPLC grade acetonitrile (99.9% purity) and methanol (99.8% purity) were obtained from Caledon Laboratory Chemicals (Georgetown, ON, Canada). Acetone (99.5% purity, certified ACS) was obtained from Fisher Scientific (Ottawa, ON, Canada). Hydrogen peroxide was obtained from a local grocery store and was 3% w/v (0.88 mol/L). Water used in the preparation of glyphosate solutions was distilled in the laboratory. Apples (Malus domestica Mutsu, aka Crispin) were obtained directly from a local farmer (Niagara, ON, Canada).
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