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Ultra-trace determination of oxyhalides in ozonated aquacultural marine waters by direct injection ion chromatography coupled with triple-quadrupole mass spectrometry

Citation

Sanz Rodriguez, E and Lam, S and Smith, GG and Haddad, PR and Paull, B, Ultra-trace determination of oxyhalides in ozonated aquacultural marine waters by direct injection ion chromatography coupled with triple-quadrupole mass spectrometry, Heliyon, 7, (4) Article e06885. ISSN 2405-8440 (2021) [Refereed Article]


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DOI: doi:10.1016/j.heliyon.2021.e06885

Abstract

A direct, robust, accurate and highly sensitive method for oxyhalide species in natural waters, including seawater, using suppressed ion chromatography coupled with mass spectrometry (IC-MS) is described. The method utilised a high capacity, high efficiency anion-exchange column (Dionex IonPac AS11-HC, 4 mm, 2 250 mm), with the separation achieved using an electrolytically generated potassium hydroxide gradient, delivered at 0.380 mL min−1. Applying the method, detection limits for iodate, bromate, and chlorate in seawater after direct sample injection (20 μL injection volume, samples diluted 10-fold), were 11, 30 and 13 ng L−1 (ppt), respectively. Standard addition calibrations to ozonated seawater samples were linear, in all cases R2 > 0.999 (n = 10), with intra-day repeatability of 3.7, 11.2 and 1.8 % RSD (n = 10) for a low-level standard mixture (0.30 μg L−1 of iodate, 0.15 μg L−1 of bromate, and 1.50 μg L−1 of chlorate). The method was applied to the analysis of seawater samples taken pre- and post-disinfection points within a recirculating aquacultural system. Iodate, bromate and chlorate were detected as the main oxyanionic disinfection by-products, demonstrating the practical utility of the new method as a valuable tool for monitoring changes to seawater composition following disinfection treatments.

Item Details

Item Type:Refereed Article
Keywords:oxyhalides, natural and saline waters, ozonation, ion chromatography, mass spectrometry, ultra-trace determination, aquacultural industry
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Separation science
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Fisheries - aquaculture not elsewhere classified
UTAS Author:Sanz Rodriguez, E (Dr Estrella Sanz Rodriguez)
UTAS Author:Lam, S (Mr Shing Chung Lam)
UTAS Author:Smith, GG (Professor Gregory Smith)
UTAS Author:Haddad, PR (Professor Paul Haddad)
UTAS Author:Paull, B (Professor Brett Paull)
ID Code:144223
Year Published:2021
Web of Science® Times Cited:1
Deposited By:Fisheries and Aquaculture
Deposited On:2021-04-29
Last Modified:2021-10-13
Downloads:0

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