A microscale Kjeldahl nitrogen determination for environmental waters

被引：11

作者：

Campins-Falco, P. ^{[1
]}

Meseguer-Lloret, S. ^{[1
]}

Climent-Santamaria, T. ^{[1
]}

Molins-Legua, C. ^{[1
]}

机构：

[1] Univ Valencia, Dept Quim Analit, Fac Quim, E-46100 Valencia, Spain

来源：

TALANTA | 2008年 / 75卷 / 04期

关键词：

microscale; nitrogen Kjeldahl system; ammonium and/or organic nitrogen determination; ammonia electrode; water samples;

D O I：

10.1016/j.talanta.2008.01.037

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A microscale Kjeldahl system has been designed which has been homemade reduced. The digestor unit of a macroKjeldahl system and a modified glassware microdistillation unit have been used. The optimal conditions for digestion and distillation have been established for ammonium and methylamine as model compound of organic amino nitrogen. The optimised procedure has been applied to the determination of Kjeldahl nitrogen in water samples. Recoveries near 100% and good precision have been achieved. This procedure combines nitrogen miniaturized system and the use of a selective ion electrode for ammonia detection. The analysis time was reduced 4.8 times and the analysis cost 6.6 times compared with classical procedure. The residues generated have been also markedly minimized. A preconcentration factor of 4 instead of 1.5 obtained by the macroscale design has been achieved. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：1123 / 1126

页数：4

共 12 条

[1] Measurement and analysis of atmospheric ammonia emissions from anaerobic lagoons [J].

Aneja, VP ;

Bunton, B ;

Walker, JT ;

Malik, BP .

ATMOSPHERIC ENVIRONMENT, 2001, 35 (11) :1949-1958

[2] Determination of dissolved organic nitrogen in natural waters using high-temperature catalytic oxidation [J].

Badr, ESA ;

Achterberg, EP ;

Tappin, AD ;

Hill, SJ ;

Braungardt, CB .

TRAC-TRENDS IN ANALYTICAL CHEMISTRY, 2003, 22 (11) :819-827

[3]

Burt T.P, 1993, NITRATE PROCESSES PA

[4] Pollutant removal from municipal sewage lagoon effluents with a free-surface wetland [J].

Cameron, K ;

Madramootoo, C ;

Crolla, A ;

Kinsley, C .

WATER RESEARCH, 2003, 37 (12) :2803-2812

[5] Stream water quality changes following timber harvest in a coastal plain swamp forest [J].

Ensign, SH ;

Mallin, MA .

WATER RESEARCH, 2001, 35 (14) :3381-3390

[6] QUANTITATIVE MICROSCALE DETERMINATION OF VITAMIN-C [J].

KUMAR, V ;

COURIE, P ;

HALEY, S .

JOURNAL OF CHEMICAL EDUCATION, 1992, 69 (08) :A213-A214

[7] Determination of ammonia and primary amine compounds and Kjeldahl nitrogen in water samples with a modified Roth's fluorimetric method [J].

Lloret, SM ;

Andrés, JV ;

Legua, CM ;

Falcó, PC .

TALANTA, 2005, 65 (04) :869-875

[8] Chemiluminescent method for detection of eutrophication sources by estimation of organic amino nitrogen and ammonium in water [J].

Meseguer-Lloret, S. ;

Molins-Legua, C. ;

Verdu-Andres, J. ;

Campins-Falco, P. .

ANALYTICAL CHEMISTRY, 2006, 78 (21) :7504-7510

[9] Microscale quantitative analysis of hard water samples using an indirect potassium permanganate redox titration [J].

Richardson, JN ;

Stauffer, MT ;

Henry, JL .

JOURNAL OF CHEMICAL EDUCATION, 2003, 80 (01) :65-67

[10] A comparative study of microscale and standard burets [J].

Singh, MM ;

McGowan, CB ;

Szafran, Z ;

Pike, RM .

JOURNAL OF CHEMICAL EDUCATION, 2000, 77 (05) :625-626

← 1 2 →