✦ LIBER ✦

Characterization and reduction of interferences in flow-injection analysis for the in situ determination of nitrate and nitrite in sea water

✍ Scribed by Anne Daniel; Dominique Birot; Michel Lehaitre; Jacques Poncin

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 947 KB
Volume: 308
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(94)00449-v

No coin nor oath required. For personal study only.

✦ Synopsis

The aim of this work is to improve the precision and the sensitivity of nitrite and nitrate determination by flow-injection analysis (FIA) for an in situ utilization. Two kinds of signal treatment are proposed in order to eliminate the refractive index provoked by the heterogeneous flow in FIA and the errors induced by temperature, salinity and pressure variations. The concentration range of this method is O-100 PM NO;-N with a detection limit (3cr,) of 0.45 PM NOT-N (A, = 0.1.51C,oi + 0.072, n = 40, r2 = 0.997). The relative standard deviation is 5% for nitrate solutions containing 0.5 PM NOT-N. The sampling rate is about 45 hh'.

📜 SIMILAR VOLUMES

Simulataneous determination of nitrite a

Simulataneous determination of nitrite and nitrate in water using flow-injection biamperometry

✍ Marek Trojanowicz; Wojciech Matuszewski; Bogdan Szostek; Jacek Michałowski 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 613 KB

DetectIon unth two polarized platmum wne electrodes 1s based on the oxldatlon of lodlde by mtnte The current IS proportlonal to the amount of lodme formed The Injected sample is spht m a flow-mlection mamfold mto two segments One of them 1s transported through a reductor mmlcolumn contammg coppenzed

Simultaneous flow injection determinatio

Simultaneous flow injection determination of nitrate and nitrite in water by gas-phase chemiluminescence

✍ Toyoaki Aoki; Muneki Wakabayashi 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 396 KB

A reagent-injection flow injection procedure for the determination of nitrate and nitrite in water by reduction to NO followed by a membrane separation process and chemiluminescence detection, with air-stripping, is proposed. Microporous PTFE was used as a membrane to transfer NO to the gas phase af

Simultaneous Determination of Nitrate an

Simultaneous Determination of Nitrate and Nitrite in Biological Samples by Multichannel Flow Injection Analysis

✍ Phillip F. Pratt; Kasem Nithipatikom; William B. Campbell 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 113 KB

cGMP) which promotes vascular smooth muscle relax-An automated method for the simultaneous determiation. ## nation of nitrite and nitrate in biological samples by Many investigators have used L-arginine analogs for using a multichannel flow injection analyzer has been competitive inhibition of NO

Simultaneous spectrophotometric determin

Simultaneous spectrophotometric determination of nitrite and nitrate in a flow-injection system

✍ Anatol Kojło; Ewa Gorodkiewicz 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 353 KB

A spectrophotometric flow-injection method based on a diazo-coupling reaction is proposed for the simultaneous determination of nitrite and nitrate. Nitrate is reduced to nitrite by using a reductor column which is formed by filling part of the sample loop with copperized cadmium. The flow system pr

Humic substances as interferences in the

Humic substances as interferences in the analysis of nitrite in water

✍ Stephanie A. Tebault; Edward J. Poziomek 📂 Article 📅 2000 🏛 John Wiley and Sons ⚖ 213 KB 👁 2 views

Photo-induced reduction of nitrate to ni

Photo-induced reduction of nitrate to nitrite and its application to the sensitive determination of nitrate in natural waters

✍ Shoji Motomizu; Masahiro Sanada 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 550 KB

A simple, sensitive and less poisonous flow-injection method for the determination of nitrate using a newly developed activator for the reduction of nitrate to nitrite is presented. Nitrate in sample solutions injected in a buffered carrier containing the activator is first reduced to nitrite while