Optical colorimetric sensor strip for direct readout glucose measurement.
A novel direct readout colorimetric optical glucose sensor strip was constructed based on a three-layer film, including a green-emitted CdTe/CdS quantum dots (QDs) layer as a stable color background, a red-fluorescent platinum-porphyrin oxygen-sensing layer and a glucose oxidase layer. The sensor achieved high resolution (up to 0.2 mmol L(-1)) glucose determination with a detection range from 0 to 3.0 mmol L(-1). A "glucose ruler" which acts as a glucose standard colorimetric card was obtained. Glucose concentration could easily be directly readout using the "glucose ruler", which made the glucose determination rapid, convenient and easy. The effects of pH, salinity and temperature were systematically investigated. The prepared sensor was finally applied for glucose sample analysis, compared with the "glucose ruler", accurate results could be directly readout.
Wang
Xu-dong
XD
The Key Laboratory of Analytical Sciences of the Ministry of Education, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
Chen
Hai-xu
HX
Zhou
Ting-yao
TY
Lin
Zhi-jie
ZJ
Zeng
Jing-bin
JB
Xie
Zhao-xiong
ZX
Chen
Xi
X
Wong
Kwok-yin
KY
Chen
Guo-nan
GN
Wang
Xiao-ru
XR
D015374:Biosensing Techniques / Q000295:instrumentation; D003124:Colorimetry / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005947:Glucose / Q000032:analysis*; D005949:Glucose Oxidase / Q000737:chemistry*; D055096:Optical Devices; D011933:Reagent Kits, Diagnostic; D012031:Refractometry / Q000295:instrumentation*
D011933:Reagent Kits, Diagnostic; D005949:Glucose Oxidase; D005947:Glucose