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Ammonium hydroxide

Manufactured by Guangzhou Chemical
Sourced in China

Ammonium hydroxide is a colorless, aqueous solution composed of ammonia and water. It is a common laboratory chemical used for various purposes, such as pH adjustment, precipitation reactions, and cleaning. The core function of ammonium hydroxide is to provide a basic environment and a source of ammonia ions in chemical processes.

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2 protocols using ammonium hydroxide

1

Multi-analyte quantification protocol

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TYL was brought from Hengtong Guanghua Factory (Xi’an, China), and ROX, SPM, JOS, and CLA were from European Pharmacopoeia (EDQM, Strasbourg, France). KIT, ERY, TIL, TUL, and AZI were obtained from Sigma Chemicals Co. (St. Louis, MO, USA). MED was obtained from the China Institute of veterinary drugs control (Beijing, China). The purity of each analytical standard is higher than 92.5%. The chromatographic grade methanol, acetonitrile, and formic acid (FA) were purchased from Fisher Scientific (Fairlawn, NJ, USA). Other organic solvents such as ammonium hydroxide, acetic acid, and chloroform were analytical grade and brought from Guangzhou Chemical Reagent Factory (Guangzhou, China). Ultrapure deionized water was produced by a Millipore MilliQ water system (Molsheim, France). C18 (200 mg, 3 mL) and SCX (60 mg, 3 mL) SPE cartridges were available from Agilent Technologies Co. (Santa Clara, CA, USA). The Oasis HLB cartridge (60 mg, 3 mL) was obtained from Waters Co. (Milford, MA, USA).
The stock standard solution (1.0 mg/mL) of each compound was prepared by dissolving 10 mg of analytical standard in 10 mL of methanol and can be stored at −20 °C for 3 months. Working solutions were obtained by diluting the stock solution with methanol, daily, according to practical requirements.
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2

Dental Resin Modification with Dopamine

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Dental resins of polymethyl methacrylate (PMMA), NextDent Denture 3+ (Pink) with product code NDBAPI01000, were purchased from NextDent (Soesterberg, Netherlands) and used directly. Dopamine hydrochloride (DA·HCl, ≥99%) and Tris (hydroxymethyl aminomethane) (Tris, ≥99.5%) were purchased from Aladdin (Shanghai, China). Other reagents used in this study, including microcrystalline cellulose silver nitrate (AgNO3, ≥99%), hydrochloric acid (HCl, 36.5 wt.%), sodium hydroxide (NaOH, ≥99%), ammonium hydroxide (NH3·H2O, ≥99%) and glucose (≥99.5%), were purchased from Guangzhou Chemical Reagent Factory (Guangzhou, China) and used without further purification.
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