equipment , purchase of equipment:portable electrochemicl device , portable electrochemical device: potentiostat with electrochemical impedance spectroscopy (eis), full dc-potential range: - 2 v to +2 v dynamic dc-potential range: 2.2 v, compliance voltage: -2.0 to +2.0 v maximum current: ± 5 ma, max. data acquisition rate: 1000 datapoints/s, should supports eis potentiostat - channels: 1 channel (1x we, 1x re, 1x ce),applied dc-potential resolution: 540 ?v applied potential accuracy: < 0.2%,current ranges: 100 na to 5 ma,current resolution: 0.006% current accuracy: < 0.5 % of current ± 0.1% of range,measured potential resolution (for ocp): 60 uv (for ocp) impedance measurements -frequency range: 10 mhz to 200 khz ac-amplitude range: 1 mv to 0.25 v rms, or 0.708 v p-p electrometer - electrometer amplifier input: > 1 t? // 10 pf, bandwidth: 250 khz other power and communication: usb-c,sensor connector: spe operation temperature range: 0 °c to +40 °c sensor (spe) connector sensor pitch: 2.54 mm electrode connections: re, we, ce maximum sensor thickness: between 0.1 mm and 0.8 mm maximum sensor width: 11 mm software supported techniques: · voltammetric techniques-linear sweep voltammetry (lsv), cyclic voltammetry (cv) · pulsed techniques - differential pulse voltammetry (dpv),square wave voltammetry (swv),normal pulse voltammetry (npv) · amperometric techniques -chronoamperometry (ca),chronocoulometry (cc), multistep amperometry (ma),pulsed amperometric detection (pad) · potentiometric techniques-open circuit potentiometry (ocp) · impedimetric techniques -potentiostatic electrochemical impedance spectroscopy, dc-potential sweep, impedance time scan hg/hgo reference electrode hg/hgso4 reference electrode