Qs quartz high performance cuvettes

A double beam Perkin Elmer UV/Vis/NIR Lambda 19 spectrophotometer (Waltham, MA, USA) was used to measure antioxidant and anti-radical indexes. Standard and reagent blank solutions were located in the sample and reference holders, respectively. QS quartz high performance cuvettes (10 mm optical path) from Hellma Analytics (Jena, Germany) were used.
Electrochemical studies were performed with a μAutolab system Type (III) (EcoChemie, Utrecht, The Netherlands) attached to a 663VA stand (Metrohm, Herisau, Switzerland). In all cases, a conventional cell was used with Ag|AgCl|KCl (3 mol L⁻¹) as the reference electrode, platinum wire as the auxiliary electrode and a screen-printed carbon DRP-110 (Dropsens, Oviedo, Spain) as the working electrode in DPV mode. Data was acquired with a personal computer using the GPES 4.9 software (EcoChemie, Utrecht, The Netherlands).

An 8453 UV-Vis Spectrophotometer (Agilent, Santa Clara, CA, USA) was used for the spectrometric determinaton of total phenolic and flavonoid contents, and antioxidant capacity. QS quartz high performance cuvettes (10 mm optical path) from Hellma Analytics (Jena, Germany) were used. Additionally, other laboratory equipment comprises a Vibra Mix R Vortex (Ovan, Barcelona, Spain), a Precisterm thermostatic bath 20L (JP Selecta, Barcelona, Spain) and a bransonic ultrasonic cleaner Branson 5510EMTH (Sigma-Aldrich, MO, USA).