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Optima grade acetonitrile

Manufactured by Thermo Fisher Scientific
Sourced in United States, United Kingdom

Optima grade acetonitrile is a high-purity solvent used in various analytical and chemical applications. It is a colorless, volatile, and flammable liquid with a characteristic odor. Optima grade acetonitrile meets strict quality standards and is suitable for use in sensitive analytical techniques, such as high-performance liquid chromatography (HPLC), gas chromatography (GC), and mass spectrometry (MS).

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23 protocols using optima grade acetonitrile

1

Synthesis and Characterization of Rhenium Complexes

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Rhenium(I) pentacarbonyl chloride, silver
trifluoromethanesulfonate, and IR-grade potassium bromide were purchased
from Aldrich. Diethyl ether, HPLC-grade methanol, and optima-grade
acetonitrile were purchased from Fisher Scientific. Absolute ethanol
was obtained from AAPER. The solvents, methanol, hexanes, and acetonitrile
were obtained from Fisher. The compound 1,10-phenanthroline (phen)
was obtained from GFS. Deuterated solvents, CDCl3, CD3OD, and (CD3)2S=O, were obtained
from Cambridge Isotopes. Diethyl ether, HPLC-grade methanol, methylene
chloride, hexanes, and optima-grade acetonitrile for UV–visible
spectral determinations were purchased from Fisher Scientific. Acetonitrile
was used as solvent for absorption and emission studies. Electrochemical
grade tetrabutylammonium hexafluorophosphate was purchased from Southwestern
Analytical. A ferrocene standard used in electrochemical studies was
purchased from Aldrich. Dried acetonitrile used as a electrochemical
background was contained in a Sure/Seal bottle and was purchased from
Aldrich.
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2

Quantitative Mass Spectrometry Workflow

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Optima grade water + 0.1% formic acid, Optima grade acetonitrile +0.1% formic acid, L-ascorbic acid, hydroquinone, and acetone were purchased from Fisher Scientific (Fair Lawn, NJ). All chemicals were ACS reagent grade or higher. MassPREP™ Digestion Standard Protein Expression Mixture 2 and enolase digestion standard were obtained from Waters Corporation (Milford, MA).
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3

Quantifying Eicosanoid Metabolites via Liquid Chromatography-Mass Spectrometry

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Stocks of AA, cis-EETs (14,15-, 11,12-, 8,9-, and 5,6-EETs), deuterated internal standards (14,15-EET-d11, 8,9-EET-d11, 5,6-EET-d11, and 14,15-DHET-d11) and 4-[[trans-4-[[(tricyclo[3.3.1.13,7]dec-1-ylamino)carbonyl]amino]cyclohexyl]oxy]-benzoic acid (t-AUCB) were purchased from Cayman Chemical (Ann Arbor, MI). 2,2′-azobis(4-methoxy-2,4-dimethylvaleronitrile) (MeOAMVN) and 2,2′-azobis(2-(2-imidazolin-2-yl) propane) dihydrochloride (AIPH) were obtained from Wako Chemicals USA, Inc (Richmond, VA). Pure AA stocks were purchased from Nu-Chek-Prep, Inc (Elysian, MN). Dulbecco's phosphate buffered saline (PBS), ACS-grade ethyl acetate, chloroform, Optima-grade acetonitrile, water, and methanol were purchased from Fisher Scientific (Hampton, NH). Benzene, triphenylphosphine (TPP), butylated hydroxytoluene (BHT), phospholipase A2 from Naja mossambica mossambica, pyruvic acid, and diethylenetriaminepentaacetic acid (DETAPAC) were obtained from Sigma-Aldrich (St. Louis, MO). 1,2-dilauryl-sn-glycero-3-phosphocholine (DLPC) and 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) were purchased from Avanti Polar Lipids, Inc (Alabaster, AL).
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4

Dapivirine Quantification in Breast Milk

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Dapivirine (TMC120 (4-[[4-[(2,4,6-trimethylphenyl)-amino]-2-pyrimidinyl]amino]benzonitrile)) was purchased from Toronto Research Chemicals (North York, ON, Canada) in powdered form. The deuterated internal standard 2H4-dapivirine was obtained from the International Partnership for Microbicides (IPM; Silver Spring, MD, USA) in powdered form (Figure 1). Drug-free human breast milk was purchased from BioIVT (Westbury, NY, USA). Optima-grade acetonitrile, methanol, water, 0.1% formic acid in water and certified ACS plus grade ammonium hydroxide were purchased from Fisher Scientific (Fairlawn, NJ, USA). ACS reagent grade formic acid was purchased from Sigma Aldrich (St. Louis, MO, USA). HPLC grade n-Hexane was purchased from Alfa Aesar (Haverhill, MA, USA).
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5

Quantitative Bile Acid Analysis

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Optima grade acetonitrile and water were purchased from Fisher Scientific (Loughborough, UK). Ammonium acetate was purchased from Sigma-Aldrich (Dorset, UK). Formic acid was purchased from Fluka (Buchs, Switzerland). Bile acid standards, including tauro-alpha-muricholic aicd (T-α-MCA), tauro-beta-muricholic acid (T-β-MCA), tauro-omega-muricholic acid (T-ω-MCA), alpha-muricholic acid (α-MCA), beta-muricholic acid (β-MCA), taurohyocholic acid (THCA), glycoursodeoxycholic acid (GUDCA), tauroursodeoxycholic acid (TUDCA), hyocholic acid (HCA), taurohyoxydeoxycholic acid (THDCA), taurocholic acid (TCA), cholic acid (CA), ursodeoxycholic acid (UDCA), hyodeoxycholic acid (HDCA), glycodeoxycholic acid (GDCA), taurodeoxycholic acid (TDCA), chenodeoxycholic acid (CDCA), and deoxycholic acid (DCA) were purchased from Steraloids, Inc. (Newport, RI). Standard solutions of these 20 bile acids were prepared at concentrations of 0.5, 10, 50, 100, 500, 1500, 5000, and 10 000 nM in a solution of 20% (v/v) acetonitrile and water.
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6

Quantification of Bupropion Metabolites

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Bupropion, R-Bupropion, S-Bupropion, OH-Bupropion, R,R-OH-Bupropion, S,S-OH-Bupropion, threohydroBupropion, erythrohydroBupropion, Bupropion-d9, OH-Bupropion-d6, and threohydroBupropion-d9 were purchased from Toronto Research Chemicals (Toronto, Canada). 4′-OH-Bupropion, threo-4′-OH-hydroBupropion, and erythro-4′-OH-hydroBupropion were synthesized as previously described (Sager et al., 2016 ). Hydrochloric acid, formic acid, and sodium hydroxide were purchased from Sigma-Aldrich (St. Louis, MO). Optima grade acetonitrile, methanol, water, and pooled human liver microsomes (Gibco, mixed gender, n = 50) were purchased from Fisher Scientific (Waltham, MA). Pooled S9 fractions (n = 20, mixed gender) and recombinant P450 enzymes coexpressed with cytochrome P450 reductase and cytochrome b5 were purchased from BD Biosciences (San Jose, CA). CYP2B6 inhibitory monoclonal antibody (MAB-CYP2B6) was purchased from Corning (Corning, NY).
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7

Analytical-Grade Chemical Standards Protocol

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All chemical standards used in this study were minimally analytical grade and obtained from commercial sources (Table S1). Optima grade acetonitrile and methanol were purchased from Fisher Scientific (Fair Lawn, NJ) for the mobile phase and standard solutions. Optima LC/MS ammonium acetate and formic acid and TraceMetal grade ammonium hydroxide were used as mobile phase additives and also obtained from Fisher Scientific. All water used in this study was deionized and filtered (18.2MΩ, 0.22μm).
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8

Mass spectrometry protocol for lipid extraction

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Solvents and buffers for mass spectrometry analysis and lipid extraction were purchased from Merck (hyper grade methanol, gradient grade ethanol, LC grade MTBE, and LC-MS grade formic acid) or Fisher (optima grade acetonitrile, and 2-propanol). 1,2-diphytanoyl-sn-glycero-3-phosphocholine and 1,2-diarachidoyl-sn-glycero-3-phosphocholine were purchased from Avanti Polar Lipids (Alabama, United States), beta-L-gulopyranosyl-caldarchaetidyl-glycerol was purchased from Matreya, LLC (Pennsylvania, United States), and C46 GTGT was purchased from Pandion Laboratories LLC (Indiana, United States). Other reagents used for cell culturing and quantitative PCR assays have been described in our previous report (Law et al., 2021 (link)).
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9

Quantitative Analysis of Tamoxifen Metabolites

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Tamoxifen, Tamoxifen-d5, 4-hydroxy-Tamoxifen (pure Z-trans-isomer, >98 % Z), 4-hydroxy-Tamoxifen-d5, N-desmethyl-Tamoxifen hydrochloride, N-desmethyl-Tamoxifen-d5, N-desmethyl-4-hydroxy-Tamoxifen (1:1 E/Z mixture) and N-desmethyl-4-hydroxy-Tamoxifen-d5 (1:1 E/Z mixture) were obtained from Toronto Research Chemicals (North York, ON, Canada). Optima-grade acetonitrile, methanol, water and certified ACS xylene were purchased from Fisher Scientific (Fair Lawn, NJ, USA). Formic acid and ammonium acetate were from Sigma-Aldrich (Oakville, ON, Canada). Bond Elut® C2 (100 mg, 3 mL) solid-phase extraction (SPE) cartridges were obtained from Agilent Technologies (Santa Clara, CA, USA).
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10

Bile Acid Profiling with LC-MS

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Optima grade acetonitrile and water were purchased from Fisher Scientific (Loughborough, UK). Ammonium acetate was purchased from Sigma-Aldrich (Dorset, UK). Formic acid was purchased from Fluka (Buchs, Switzerland). Bile acid standards were purchased from Steraloids, Inc. (Newport, RI) and included tauro-alpha-muricholic acid (T-α-MCA), tauro-beta-muricholic acid (T-β-MCA), tauro-omega-muricholic acid (T-ω-MCA), alpha-muricholic acid (α-MCA), beta-muricholic acid (β-MCA), taurohyocholic acid (THCA), glycoursodeoxycholic acid (GUDCA), tauroursodeoxycholic acid (TUDCA), hyocholic acid (HCA), taurohyoxydeoxycholic acid (THDCA), taurocholic acid (TCA), cholic acid (CA), ursodeoxycholic acid (UDCA), hyodeoxycholic acid (HDCA), glycodeoxycholic acid (GDCA), taurodeoxycholic acid (TDCA), chenodeoxycholic acid (CDCA), and deoxycholic acid (DCA).
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