Zhang Yanan, Lim Loong-Tak
Department of Food Science, University of Guelph, ON, Canada N1G2W1.
Department of Food Science, University of Guelph, ON, Canada N1G2W1.
Talanta. 2016 Dec 1;161:105-113. doi: 10.1016/j.talanta.2016.08.014. Epub 2016 Aug 20.
Colorimetric CO indicators were prepared by printing pH dyes (M-cresol purple or phenol red, tetrabutylammonium hydroxide, ethylcellulose, 1:2 ethanol:1-butanol solvent), using a commercially available thermal inkjet printer, on either cellulose paper or plastic transparency film. Indicators inks printed on the papers had higher sensitivity to CO, greater color change, and more producible than those printed on plastic film. Varying the print intensities of the two pH dyes resulted in multiplexed indicators with tunable sensitivity and expanded detection concentration range towards CO. The ink-jet printing method is simple and highly flexible for the development of indicator to detect CO - a gas indicative of product quality in many food products. Further optimization can potentially lead to application of the indicators in intelligent food packaging systems.
比色一氧化碳指示剂是通过使用市售的热喷墨打印机，将pH染料（间甲酚紫或酚红、氢氧化四丁基铵、乙基纤维素、1:2乙醇:1-丁醇溶剂）打印在纤维素纸或塑料透明薄膜上制备而成。打印在纸上的指示剂油墨对一氧化碳具有更高的灵敏度、更大的颜色变化，并且比打印在塑料薄膜上的更易于生产。改变两种pH染料的打印强度可得到具有可调灵敏度和扩大的一氧化碳检测浓度范围的多重指示剂。喷墨打印方法对于开发用于检测一氧化碳的指示剂而言简单且高度灵活，一氧化碳是许多食品中产品质量的指示气体。进一步优化可能会使这些指示剂应用于智能食品包装系统。
