Chemical sensor

A chemical sensor, comprising:

• a substrate, comprising a first accommodating space and a second accommodating space;
• a first colorimetric sensor array, exposed and arranged in the first accommodating space of the substrate and comprising at least one first sensing material;
• and
• a second colorimetric sensor array, arranged in the second accommodating space of the substrate, the second accommodating space covered with an isolating layer which isolates liquid molecules but allows gas molecules to pass through, the second colorimetric sensor array comprising at least one second sensing material;
• wherein when the substrate is placed in an analyte, the first colorimetric sensor array changes from a first initial color to a first indicating color according to a volatile part and a non-volatile part of the analyte, and the second colorimetric sensor array changes from a second initial color to a second indicating color according to the volatile part of the analyte, each of the first sensing material and the second sensing material respectively comprising a coloring agent selected from a group consisting of sodium salts or mixtures of compounds of methyl red, Congo red, bromophenol blue, bromocresol purple, bromocresol green, cresol red, phenol red, thymolphthalein, resazurin, paranitrophenol, bromthymol blue, thymol blue, neutral red, crystal violet, 4-(4-nitrobenzyl) pyridine, pyrocatechol violet, chlorophenol red, nitrazine yellow, bromophenol red, m-cresol purple, Eriochrome black T, safranine, luciferin, Eosin yellow, Brilliant green, Titan yellow, Victoria blue B, carmine, litmus, curcumin, anthocyanin, alizarin red S, alizarin yellow R, indigo carmine, nile blue A, orange yellow G, Eosin B, 3,3′,5,5′,-tetraiodophenol sulfone phenolphthalein, bromoxylenol blue, phenol blue, disperse orange 25, acridine orange, disperse orange 3, disperse red 1, bromopyrogallol red, diaminodiphenyl acer, aminofluorescein, violet ammonium urea, 2,6-dichloroindophenol, pyrocatechol violet.