Silica (1 g) was placed in the bottom of the extraction cells as clean-up sorbent.
Cross-linked polyethylenimine, 2.5 g, was placed in 80 mL of 6 mol L−1 HCl.
In a typical procedure, urea (8 g) was placed in an alumina crucible with a cover.
Continuously, each mixture (10 g) was placed in an alumina crucible and closed loosely with an alumina lid.
The finely-powdered C. nutans (20 g) was placed in a conical flask and mixed with an extraction solution.
Rice flour (1 g) was placed in a sealed vial and allowed to equilibrate overnight at room temperature.
Therefore, amber (9.9 g) was placed in a Gregar extractor and extracted with CH2Cl2 (150 mL) for 24 h.
In the reduction step, (HSiO1.5) n (1.10 g) was placed in a corundum crucible and transferred to a tube furnace.
Briefly, a small amount of Sn powder (purity: ≥99%, about 3 g) was placed in an alumina crucible.
Briefly, CdS powder (1.5 g) was placed on an alumina boat in the center region of a quartz tube.
Two milliliters of ethanol with a sample of SC-TiO2 (0.05 g) was placed in the reactor.
