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ID 19947
Eprint ID
19947
FullText URL
Title Alternative
Spectrophotometric determination of nitrate ion using nitrosation/FIA
Author
Shi, Cheng Rui
Motomizu, Shoji
Toei, Kyoji
Abstract
N, N-Bis (2-hydroxypropyl) aniline (BHPA) reacts with nitrite ion in an acidic medium to form a red product, which has the maximum absorption at 500 nm. On the basis of this color reaction, FIA of nitrate was established. Nitrate ion could be reduced to nitrite ion by passing through the reduction column(2 mm×30 cm) packed with copperized cadmium {Cu(Cd) : particle size, about 0.5 mm}, which was installed just behind the sample injection valve. The carrier solution(10(-3) M EDTA, pH 8) and the reagent solution (8×10(-4) M BHPA, 0.35 M HCl, 0.15 M H(3)PO(4)) were propelled at the flow rate of 0.7 ml/min by using a double-plunger pump. The sample(120 μl) was injected into the carrier stream by using a 6-way injection valve. The reaction coil(0.5 mm×2 m) was kept in a thermostatically controlled water bath(80℃). The cooling coil(0.5 mm×50 cm), which was installed just behind the reaction coil, was kept in a water bath (tap water temperature). A calibration curve was linear up to 2×10(-4) M nitrate. The detection limit corresponding to S/N=2 was 10(-6) M nitrate, and the relative standard deviation (10 injections) was 0.4%, and the sampling rate was 40 samples per hour. Nitrate in river water at concentrations of 10(-5) M level was determined.
Keywords
FIA of nitrate
reduction of nitrate to nitrite on Cu (Cd) column
color reaction of nitrite with N
Published Date
1987-03-05
Publication Title
分析化学
Publication Title Alternative
Bunseki Kagaku
Volume
volume36
Issue
issue3
Publisher
日本分析化学会
Publisher Alternative
The Japan Society for Analytical Chemistry
Start Page
207
End Page
209
ISSN
0525-1931
NCID
AN00222633
Content Type
Journal Article
Official Url
http://www.journalarchive.jst.go.jp/japanese/jnlabstract_ja.php?cdjournal=bunsekikagaku1952&cdvol=36&noissue=3&startpage=207http://www.journalarchive.jst.go.jp/japanese/jnlabstract_ja.php?cdjournal=bunsekikagaku1952&cdvol=36&noissue=3&startpage=207
language
日本語
Copyright Holders
The Japan Society for Analytical Chemistry
File Version
publisher
Refereed
True