Improvement of a monitoring tape for nitrogen dioxide in air.
Improvement of a monitoring tape for nitrogen dioxide in air.
复制标题
空气中二氧化氮监测带的改进。
DOI：
10.1016/s0039-9140(98)00378-6
复制
发表时间：
1999
期刊：
影响因子：
6.1
通讯作者：
N. Nakano
中科院分区：
文献类型：
--
作者：
K. Nagashima;N. Nakano
已开发出一种含有硅胶的多孔纤维素胶带，该硅胶先前浸渍了含有对甲苯磺酸、磺胺、n -1-萘乙二胺二盐酸盐、乙二醇和甲醇的处理溶液，以提供对空气中二氧化氮的高灵敏度检测。当含有二氧化氮的样品通过胶带时，胶带的颜色变为红色，通过测量反射光强度（555nm）可以记录颜色变化的程度。校准图线性上升至~ 0.10 ppm。二氧化氮的检出限为0.5 ppb，采样时间为8 min，流速为60 ml min - 1。没有观察到氨（40 ppm）、二氧化硫（51 ppm）、二氧化碳（21%）、臭氧（0.75 ppm）、硫化氢（27 ppm）或一氧化氮（99 ppm）的干扰。
A porous cellulose tape containing a silica gel that was previously impregnated with a processing solution containing p-toluenesulfonic acid, sulfanilic acid, N-1-naphthyl ethylene diamine dihydrochloride, ethylene glycol and methanol has been developed to provide a highly sensitive detection of nitrogen dioxide in air. When the sample including nitrogen dioxide was passed through the tape, the color of tape changed to red, and the degree of color change could be recorded by measuring the intensity of reflecting light (555 nm). The calibration graph was linear up to ∼0.10 ppm. The detection limit was 0.5 ppb for nitrogen dioxide with a sampling time of 8 min and a flow rate of 60 ml min−1. No interferences were observed from ammonia (40 ppm), sulfur dioxide (51 ppm), carbon dioxide (21%), ozone (0.75 ppm), hydrogen sulfide (27 ppm) or nitrogen monoxide (99 ppm).