A multisyringe flow injection system coupled with a gas diffusion cell for ammonium determination

被引：10
|
作者：
Klimundová, J
Forteza, R
Cerdá, V
机构：
[1] Univ Balearic Isl, Dept Chem, E-07071 Palma de Mallorca, Spain
[2] Charles Univ, Fac Pharm Hradec Kralove, Prague, Czech Republic
来源：
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY | 2003年 / 83卷 / 03期
关键词：
multisyringe flow injection analysis (MSFIA); ammonium; gas diffusion;
D O I：
10.1080/10306731021000048582
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A multisyringe flow injection system for ammonium determination based on the coupling of a gas-diffusion separation cell has been developed. By using a multisyringe burette equipped with additional three-way solenoid valves, the system allows the use of different reagents or samples with further propelling into a gas-diffusion unit. Two possibilities were tested to increase the sensitivity and repetitivity: flow delay during the diffusion of the ammonia formed and use of successive flow reversals. The proposed MSFIA system is compared with the FIA and SIA techniques based on the same principle and has been validated applying the method to the determination of ammonium in environmental samples.
引用
收藏
页码：233 / 246
页数：14
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