Iron 2 sulphate heptahydrate

A Folin–Ciocalteu’s (FC) reagent, a total phenolic content (TPC) standard, iron (II) chloride hexahydrate (98%), iron (III) chloride hexahydrate (97%), iron (II) sulphate heptahydrate (99%), hydrogen chloride (HCl, 99%), sodium acetate, 2,4,6-tris-(2-pyridyl)-s-triazine (TPTZ > 98%), sinapic acid (>97%), 2,2-diphenyl-1-picrylhydrazyl (DPPH, 97%), and formic acid were all purchased from Fisher Scientific Canada Ltd. (Ottawa, ON, Canada). Aluminum chloride (AlCl₃), sodium nitrite (NaNO₂), sodium carbonate (Na₂CO₃), sodium hydroxide (NaOH), ferrozine, and disodium ethylenediaminetetraacetic acid (Na₂EDTA) were purchased from Sigma Canada Ltd. (Mississauga, ON, Canada). Quercetin hydrate (>95%) and 2-amino-ethyl-diphenyl borate (98%) were purchased from Acros (Mississauga, ON, Canada).
Extraction reagents, including methanol (optima grade) and ethanol (analytical grade), and standard compounds for high-performance liquid chromatography (HPLC) were purchased from Sigma Canada Ltd. (Mississauga, ON, Canada).

Barium sulphate (98%), eicosane (99%), octacosane (99%) were purchased from Acros Organics. Oleic acid (technical grade, 90%), calcium carbonate (99%), agar (powder, for microbiology), iron (II, III) oxide (nanopowder, 50–100 nm particle size (SEM), 97% trace metals basis, used as a magnetite XRD standard) and Crystal Violet (hexamethylpararosaniline chloride, >90%) were purchased from Sigma-Aldrich. Iron(III) chloride hexahydrate (98%) was purchased from Alfa Aesar reagents. Iron(II) sulphate heptahydrate (98%), sodium hydroxide pellets (Analytical reagent grade) and ammonium hydroxide solution (28% in water) were purchased from Fisher Scientific, and perfluorooctyl bromide (PFOB, 97%) from Fluorochem Ltd. Iohexol (Omnipaque 300) was obtained from GE healthcare. Aspirin tablets were bought commercially from Boots Ltd. Laboratory solvents were purchased from Sigma Aldrich Limited and were of analytical grade. Aqueous solutions were prepared using UHQ deionised water with a resistivity of not less than 18.2 MΩ cm⁻¹. N₂ (oxygen free) gas was purchased from BOC Ltd. and used as received. Gelatin capsules were purchased from CapsulCN, China.