MULTICOMMUTED FLOW SYSTEM FOR AMMONIUM AND MONOCHLORAMINE DETERMINATIONS IN WASTEWATER AND DISINFECTION PRODUCTS.

作者：Borges Sivanildo da Silva^*; Soares Fernandez Acevedo Maria Soledad Moura; Korn Mauro

来源：Quimica Nova, 2009, 32(5): 1175-1179.

• monochloramine determination
• ammonium determination
• multicommutation

MULTICOMMUTED FLOW SYSTEM FOR AMMONIUM AND MONOCHLORAMINE DETERMINATIONS IN WASTEWATER AND DISINFECTION PRODUCTS. A binary sampling flow analysis system equipped with gas diffusion cell was developed for NH4+ and/or NH2Cl determination in wastewater and disinfection products samples based on the Berthelot reaction of the NH2Cl diffused through the semi-permeable PTFE membrane. The effect of the analytical conditions related to the reaction and flow parameters were evaluated and N-NH4+ and N-NH2Cl were determined in concentration ranges from 0.17 to 5 mg L-1 and from 0.5 to 14.5 mg L-1, respectively. Limits of detection (3 sigma) of 50 and 140 mu g L-1 for N-NH4+ and N-NH2Cl were calculated, respectively, and RSD of 5 and 2% were calculated for 10 consecutive determinations of N-NH4+ (1 and 3 mg L-1) and N-NH2Cl (3 and 9 mg L-1), respectively with 30 determinations h(-1)

• 出版日期2009