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3 protocols using phosphoric acid

1

Synthesis of Polymeric Adsorbents

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Tetrahydrofuran (THF), acetone, acetonitrile, hydrogen peroxide (H2O2), toluene, alcohols, and product standards were purchased from Merck India Ltd, vinylbenzyl chloride (VBC) was purchased from Sigma Aldrich, sodium tungstate, trimethylamine, phosphoric acid, sodium nitrate was obtained from SD fine chemicals Ltd, tetrabutylammonium bromide was purchased from Sisco Research Laboratories Pvt. Ltd (SRL), divinylbenzene (DVB) was purchased from TCI chemicals, azobisisobutyronitrile (AIBN) was obtained from Paras Polymer and Chemical, India, Amberlite IRA 900 resin was obtained from Alfa Aesar.
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2

Graphite-Reinforced PEEK Composite Synthesis

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Poly(ether ether ketone)
(PEEK) (medium melt viscosity grade 450 PF) was obtained from Victrex
PLC, England, and 3-aminopropyl trimethoxysilane (99%) was received
from Sigma-Aldrich Chemicals. Graphite (Gt) powder (size 100 μm),
dimethylacetamide (DMAc), phosphoric acid, formaldehyde, acetone,
methanol, H2SO4, NaOH, NaCl, NaNO3, KMnO4, H2O2, HCl, and Na2SO4 of analytical grade were obtained from SD Fine Chemicals,
India and used with proper purification. All experiments were performed
using ultrapure water (resistivity: 18.2 MΩ cm).
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3

Quantitative HPLC Analysis of Drugs

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Working standards of pure Torasemide (98.9%) and Spironolactone (99.4%) from Cipla Ltd (Mumbai, India) and Phenobarbitone (99.1%) from Bondane Pharma Ltd (Mumbai, India) were used in this study. Acetonitrile of HPLC grade, potassium di-hydrogen ortho phosphate, phosphoric acid and triethylamine of analytical reagent grade were procured from SD Fine Chemicals (Mumbai, India). HPLC grade water was prepared by using Milli-Q Academic system, Millipore (Bangalore, India).
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