of five quartz glass cuvettes with different concentration of a blue substance solution from light to dark.

analysis analytic analytical background biochemistry biology blue calibration chemical chemistry chromatography concentration cuvette cuvettes dark design different equipment experiment five flask glass illustration instrument instrumental isolated lab laboratory light line liquid measurement medical microbiology pharmacy quartz range research sample samples science scientific set small solution spectrophotometer spectrophotometry spectroscopic spectroscopy standards study substance technology test tisk transparent tube vector white