Analytical Chemistry
Colorimetric measurement. Sensitivity
and selectivity. Digital color change
processing.
Part I
Lecture 06
Analytical Chemistry
Number of papers published between
1960 and 2015. Bar chart. Distribution
per year and by imaging device:
-magenta: conventional instrumentation;
-orange: colorimeters;
-blue: scanners;
-yellow: CCD/digital cameras;
-red: cell phones/smartphones;
-green: webcams;
-cyan: homemade instrumentation.
Analytical Chemistry
The computer vision-based analytical chemistry approach
Analytical Chemistry
CIE XYZ space
HSV space
CIELAB space
Analytical Chemistry
Arrangement used for
measurements with
1: digital photographic camera;
2: transmission scanner;
3: reflexion scanner.
Analytical Chemistry
Computer screen photoassisted technique platform
for fingerprinting fluorescent
compounds.
Analytical Chemistry
Arrangement used for colour-based luminescence measurements.
1: O2 in water with PtTFPP membrane and CCD camera
2: O2 in gas with PtOEP membrane and CCD micro-camera
Analytical Chemistry
Reagent-mediated CVAC procedures in solution
1: Fluorimetric DNA detection using mobile phone camera based on DNA amplification by convective polymerase
chain reaction technique;
2: Optical reader attachment on a smartphone for the determinftion of food allergen.
Analytical Chemistry
Wearable colourimetric instrument for O2 determination in breath.
Analytical Chemistry
Spectra of the most common illuminants
Analytical Chemistry
Reagent-mediated CVAC procedures in solid phase.
1: Smartphone platform with app for the quantification of nitrite and pH;
2: Layout of mPAD fabricated by wax printing for metal-containing aerosol determination.
3: Calibration curve for Fe by measuring the grey intensity of the colour in detection reservoirs.
Analytical Chemistry
Selection of direct CVAC procedures
Analytical Chemistry
Colour ratiometric planar
optode imaged using a digital
camera. Distribution in marine
sediments 1: Oxygen; 2: pH.
Paper-based microfluidic
electrochemiluminescent sensor including
screenprinted cell (1) with camera phone as a
luminescence detector (2).
Analytical Chemistry
Electronic noses and tongues-type CVAC procedures.
1: Colourimetric sensor array and its cartridge packing for scanner-based nose for VOCs.
2: Colourimetric sensor array and cube light box for digital camera-based tongue for metal ions.
Analytical Chemistry
THANKS FOR ATTENTION!