Exposure to colorless ammonia vapors could result in failure of human organs or even death. Thus, it is of great significance to build up a portable quick onsite recognition technique for ammonia vapor. In this context, we report the preparation of ratiometric, highly sensitive, reversible, portable, fast detection time, cost effective solid state microporous cellulose test strips that exhibit a naked-eye colorimetric responsiveness within a fraction of second to ammonia vapor. An easy-to-prepare pH-responsive tricyanofuran-hydrazone (TCFH) dye was developed. The hydrazone recognition unit is able to selectively monitor ammonia over a series of other alkaline organic compounds and solvents. This TCFH was diffused in-situ within the as-prepared microporous cellulose acetate (CA). The size, sensitivity, and subsecond response of this spectroscopic hydrazone probe made them suitable for inclusion into cellulose acetate strips sensor assays (CA-TCFH) and ammonia vapor detection. The aqueous ammonia concentration range between 0.4 and 72 ppb displayed a color shift of the spectroscopic hydrazone dye from yellow to purple. The color shift of CA-TCFH was monitored from yellow to orange, red and purple with increasing the aqueous ammonia concentration, which was studied by color strength and CIE Lab measurements. Cellulose acetate test strip displayed a good detection limit as low as 0.4 ppb of aqueous ammonia. When the cellulose sensor strip is subjected to ammonia vapor, the conversion of spectroscopic hydrazone probe into the hydrazone anion form causes a rapid color change. The microporous cellulose acetate showed high porosity with a pore diameter in the range of 4.5-7.5 μm.

暴露在无色氨气中会导致人体器官衰竭甚至死亡。因此，建立一种便携式的氨气快速现场识别技术具有重要意义。在这种情况下，我们报告了比例，高度灵敏，可逆，便携式，快速检测时间，具有成本效益的固态微孔纤维素测试条的制备，该测试条对氨蒸汽具有不到几分之一秒的肉眼比色响应能力。开发了一种易于制备的pH响应型三氰呋喃-（TCFH）染料。recognition识别单元能够选择性监测一系列其他碱性有机化合物和溶剂中的氨。该TCFH原位扩散在制备的微孔醋酸纤维素（CA）中。这种spec光谱仪探针的大小，灵敏度和亚秒级响应使其适合用于醋酸纤维素条传感器分析（CA-TCFH）和氨气检测。氨水浓度范围在0.4到72 ppb之间，显示了the染料从黄色到紫色的色移。随着氨水浓度的增加，监测了CA-TCFH从黄色到橙色，红色和紫色的色移，这通过色强度和CIE Lab测量进行了研究。醋酸纤维素试纸显示出良好的检出限，低至0.4 ppb的氨水。当纤维素传感器条受到氨蒸汽的影响时，光谱探针转换为hydr阴离子形式会导致颜色快速变化。微孔醋酸纤维素显示出高孔隙率，孔径范围为4.5-7.5μ微米。