Determination of Nitrate and Fluoride in Spent Pickling Baths for Stainless Steel by Spectrophotometry and Potentiometry
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62243136%3A_____%2F22%3AN0000006" target="_blank" >RIV/62243136:_____/22:N0000006 - isvavai.cz</a>
Result on the web
<a href="https://www.tandfonline.com/doi/abs/10.1080/00032719.2022.2036182" target="_blank" >https://www.tandfonline.com/doi/abs/10.1080/00032719.2022.2036182</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1080/00032719.2022.2036182" target="_blank" >10.1080/00032719.2022.2036182</a>
Alternative languages
Result language
angličtina
Original language name
Determination of Nitrate and Fluoride in Spent Pickling Baths for Stainless Steel by Spectrophotometry and Potentiometry
Original language description
Hydrofluoric and nitric acid baths are widespread in pickling of stainless steel due to their rapid performance and excellent quality of treated surfaces. The concentrations of nitrate and fluoride play an important role in the process and therefore require regular monitoring. Simple methods for spectrophotometric determination for nitrate and potentiometric determination for fluoride were verified based upon current procedures for water analysis. After removing metals by cation exchange, the recoveries were 98.25–98.83% for nitrate and 98.15–100.6% for fluoride. These values were obtained by comparison between these methods and a reference ion chromatography procedure for real baths and the material balance measurements of artificial mixtures. Due to high metal contents in the bath, the proposed methods fail without sample pretreatment; the spectrophotometry of nitrates with sulphosalicylic acid is impossible, and fluoride potentiometry provides the results 20% lower compared to the references samples. The conditions for ion exchange pretreatment (i.e., exchanger capacity, specimen dilution, and flow rate) were optimized. The combination of simple fluoride and nitrate determination with sample pretreatment by cation exchange is suitable for monitoring the bath quality in small pickling plants, where an automatic analyzer would represent a high investment.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20400 - Chemical engineering
Result continuities
Project
<a href="/en/project/FV30119" target="_blank" >FV30119: Advanced revedelopment technologies in the recovery process of waste stainledd steal and alloys pickle liquors for the surface treatment</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Analytical letters
ISSN
0003-2719
e-ISSN
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Volume of the periodical
22
Issue of the periodical within the volume
12
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
1945-1953
UT code for WoS article
000756287000001
EID of the result in the Scopus database
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