Extraction of Chromium (VI) from Soil using Ultrasonic Liquid Extraction Techniques
Abstract
The study of the optimum condition for the chromium (VI) ion extraction from soil sample was carried out using the ultrasonic supported solvent extraction techniques. 1,5-Diphenylcarbazide was used as ligand to form the complexes with the extracted Cr (VI) ion. UV-Visible spectroscopy techniques were used to determine these complexes with wavelength at 550 nm. The extraction factors which were type of solvents, time, temperature, volume of solvent, weight of soil and concentration of NaCl were evaluated. Within this optimum condition, it was found that the linearity range was 0.05 - 2.0 mg/L with R2 value was 0.9980. The limit of detection and the limit of quantification were 0.6 and 1.8 µg/g respectively. The precision of this experiment was 2.72 - 4.99 %RSD (n=6).References
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[7] วรินดา แก้วมณีวงษ์, พัทธนันท์ นาถพินิจ และ อภิญญา นวคุณ. (2013). การหาปริมาณโครเมียม(VI) ในตัวอย่างน้ำเทคนิคการสกัดแบบ
คู่ไอออนและตรวจวัดด้วยเทคนิคยูวี-วิสิเบิลสเปกโตรโฟโตเมทรี. The 5th NPRU National Conference 2013, Nakhon Pathom Rajabhat University Nakhon Pathom Thailand 18 – 19 July 2013.
electrothermal atomic absorption spectrometry. Talanta, 74, 736-740.
[2] ชุลีกร ธนธิติกร. Chromium. เข้าถึงได้จาก : http://www.summacheeva.org/index_thaitox_chromium.html
[3] Jankiewicz, B., and Ptaszynski, B. (2005). Determination of Chromium in Soil of Lodz Gardens. Polish Journal of
Environmental Studies, 14, 869-875.
[4] Luciana, F. O., Natalia, T. C., Marcelo, B. B. G., Fabiola, M. V. P., Carlos, E. G. R. S. and Edenir, R. P. F. (2013). Proposition
of a simple Method for chromium (VI) determination in soils from remote places applying digital images : A case study from Brazilian Antarctic Station. Microchemical Journal, 109, 165-169.
[5] Hintsa, G., Subramanian, P. A., Daniel, M., Teame, K., Masho, H., Gebremedhin, G., Kebede, T. (2013). Speciation of chromium
in soils near Sheba Leather Industry, Wukro Ethiopia. Talanta, 116, 626-629.
[6] AOAC International. (1993). AOAC® peer-verified method program: manual on policies and procedures. United States of
America.
[7] วรินดา แก้วมณีวงษ์, พัทธนันท์ นาถพินิจ และ อภิญญา นวคุณ. (2013). การหาปริมาณโครเมียม(VI) ในตัวอย่างน้ำเทคนิคการสกัดแบบ
คู่ไอออนและตรวจวัดด้วยเทคนิคยูวี-วิสิเบิลสเปกโตรโฟโตเมทรี. The 5th NPRU National Conference 2013, Nakhon Pathom Rajabhat University Nakhon Pathom Thailand 18 – 19 July 2013.
