A chemometric study: Automated flow injection analysis method for the quantitative determination of humic acid in Ilgın lignite

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• 作者：İsmail Tarhan^a ; ^{ismtarhan@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Hü ; seyin Kara^a ; ^b
• 关键词：Chemometry ; Flow injection analysis ; Humic acid ; Lignite
• 刊名：Arabian Journal of Chemistry
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：9
• 期：5
• 页码：713-720
• 全文大小：1269 K

文摘

A rapid, sensitive and provident flow injection analysis (FIA) method was developed within the framework of a chemometric approach for the quantification of humic acid (HA) in the lignite obtained from Ilgın, Konya, Turkey. The proposed method allows automatic determination of 60 samples per hour over a wide calibration range (0–2000 mg L⁻¹, R²: 0.9988) and needs only 10 μL of sample at a flow rate of mobile phase (X₁), 2 mL min⁻¹; pH of mobile phase (X₂), 8, and system temperature (X₃), 20 °C. The limits of detection (LOD) and quantification (LOQ) were calculated as 9.18 mg L⁻¹ and 30.60 mg L⁻¹, respectively, and the relative standard deviation (RSD) for 500 mg L⁻¹ HA was calculated as 3.44 (n: 9). It was revealed that the standard deviation (SD) values of the proposed FIA method are lower than those of the spectrophotometric method.