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https://hdl.handle.net/2440/906
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Type: | Journal article |
Title: | Determination of soluble aluminium concentration in alkaline humic water using atomic absorption spectrophotometry |
Author: | Nguyen, K. Lewis, D. Jolly, M. Robinson, J. |
Citation: | Water Research, 2004; 38(19):4039-4044 |
Publisher: | Pergamon-Elsevier Science Ltd |
Issue Date: | 2004 |
ISSN: | 0043-1354 1879-2448 |
Statement of Responsibility: | K.L. Nguyen, D.M. Lewis, M. Jolly and J. Robinson |
Abstract: | The steps of the standard method to determine soluble aluminium concentration are filtering, followed by acidifying, then analysing with the atomic absorption spectrophotometer (AAS). When applied to alkaline humic water, acidification gives rise to the formation of humic acid as a brown particulate matter. Of the total soluble aluminium in the original water, 49–61% forms complexes with the particulate humic acid upon acidification. Although the AAS is capable of detecting the binding aluminium, the particulate nature of humic acid easily induces inaccurate readings as a result of the non-uniform distribution of the particulate matter. A more precise analysis of soluble aluminium concentration of alkaline humic water is shown to be achievable in basicified solutions instead. Basicified solutions keep humic acid in the soluble form; hence maintain the homogeneity of the sample. |
Keywords: | Soluble aluminium Alkaline humic water Quantitative analysis Atomic absorption spectroscopy |
DOI: | 10.1016/j.watres.2004.07.013 |
Published version: | http://dx.doi.org/10.1016/j.watres.2004.07.013 |
Appears in Collections: | Aurora harvest 6 Chemical Engineering publications Environment Institute publications |
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