Relative standard deviations Absorption spectroscopy 2 Atomic absorption spectrometry 2 Bacteria 2 Bacterial infections 2 Bacterial metabolism 2 Bacteriology 2 Bioassay 2 Biofilms 2 Cell impedance 2 Cell membranes 2 Chromium compounds 2 Colorimetric deter-mination 2 Colorimetry 2 Cr(III) 2 Cr(VI) 2 Electrochemical cells 2 Electrochemical electrodes 2 Electrochemical impedance spectroscopy 2 Electrode solutions 2 Electrodes 2 Electrothermal atomic absorption spectrometry 2 Extraction 2 Hybrid materials 2 Hybrid mesoporous fillings 2 Inter-digitated electrodes 2 Membrane polarization 2 Mesoporous materials 2 Mesoporous silica MCM-41 2 Microbiology 2