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3 protocols using citrinin

1

Simultaneous Mycotoxin Quantification Protocol

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Methanol (MeOH; LC gradient grade), acetonitrile (ACN; LC gradient grade), and glacial acetic acid (HAc; MS grade) were purchased from Merck (Darmstadt, Germany). Mycotoxin standards were purchased from Romer Labs Diagnostic GmbH Tulln, Austria, including: nivalenol (NIV), 13 C-NIV, DON, 13 C-DON, deepoxy-DON (DOM-1), OTA, 13 C-OTA, AFM 1 , 13 C-AFM 1 , citrinin (CIT), FB 1 , 13 C-FB 1 , 13 C-ZEN or Sigma, Vienna, Austria (ZEN, α-and β-zearalenol (ZEL)). The deuterated [ 2 H 4 ] alternariol (AOH) was synthesized by [31] (link) and kindly provided by Prof. Michael Rychlik, TU Munich. Solid standard substances were dissolved in pure ACN (α-and β-ZEL; [ 2 H 4 ] AOH). All other standards were delivered in either ACN or ACN/H 2 O (FB 1 ) and stored at -20 °C. A combined multi-standard working solution for preparation of calibrants and spiking experiments was prepared in ACN, and also, fresh mixture of 13 C and deuterated [ 2 H 4 ] stable isotope standards were prepared as described by [32] .
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2

Comprehensive Analysis of Mycotoxins in Chinese Grains

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AFB1, AFB2, AFG1, AFG2, AFM1, AFM2, ochratoxin A (OTA), ochratoxin α (OTα), deoxynivalenol (DON), 3-acetyldeoxynivalenol (3-ADON), 15-acetyldeoxynivalenol (15-ADON), neosolaniol (NEO), fusarenon X (Fus X), citrinin (CIT), fumonisins B1 (FB1), fumonisins B2 (FB2), zearalenone (ZEN), zearalanone(ZAN), α-zearalenol (α-ZOL), β-zearalenol (β-ZOL), α-zearalanol (α-ZAL), and β-zearalanol (β-ZAL) were purchased from Romer Labs, Inc. (Union, MO, USA). Sterigmatocystin (STM), gliotoxin (GLI), cyclopiazonic acid (CPA), patulin (PAT), alternariol (AOH), alternariolmethyether (AME) and altenuisin (ALS) were purchased from Sigma-Aldrich (St. Louis, MO, USA). Acetonitrile, hexane, acetone, formic acid, chloroauric acid, cysteine and ammonium acetate were also obtained from Sigma-Aldrich. Milli-Q water (Millipore, Billerica, MA, USA) was used for all analyses.
A total of 40 samples, including 20 peanut samples, 10 wheat samples, and 10 maize samples, were purchased from bazaars in Shanghai, China.
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3

Mycotoxin and Monacolin Quantification

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Citrinin (solution in acetonitrile 100 μg mL−1), ochratoxin A (solution in acetonitrile 100 μg mL−1) and aflatoxin mix containing AFB1 and AFB2 (2 μg mL−1 in acetonitrile), AFG1 and AFG2 (0.5 μg mL−1 in acetonitrile) were obtained from Romer Labs (Tulln, Austria). Monacolin K (25 mg), monacolin K acid (5 mg) and simvastatin (10 mg) were purchased from Vinci Biochem S.R.L. (Florence, Italy).
HPLC-grade ethanol, and acetonitrile were purchased from Sigma-Aldrich (Taufkirchen, Germany); bidistilled water was obtained using Milli-Q System (Millipore, Bedford, MA, USA). MS-grade formic acid from Fisher Chemical (Thermo Fisher Scientific Inc., San Jose, CA, USA) was also used.
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