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摘要
This paper presents a simple, rapid and effective method for ammonia determination in a flow analysis regime using Nessler%26apos;s reagent. The proposed modification of the common flow procedure results in the total elimination of the problem of precipitate deposition inside the flow manifold. The improved procedure has been adapted to a flow analysis system based on microsolenoid pumps combined with a dedicated optoelectronic detector fabricated specifically for this purpose. This photometric device has been constructed in the form of a compact flow-through cell (70 mu L total volume and 1 cm optical pathlength) integrated with 395 nm LED emitter and 405 nm LED-based detector. The presented analytical system is capable of ammonia determination in the submillimolar concentration range with a detection limit below 0.1 mM and high throughput (over 20 injections per hour).
- 出版日期2014-10
