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090			_aB-8774
245	1	0	_aDetermination of major and trace elements in human scalp hair by pressurized-liquid extraction with acetic acid and inductively coupled plasma-optical-emission spectrometry
490	0		_vAnal. Bioanal. Chem., 388(2), p.441-449, 2007
520	3		_aAn analytical method has been developed for determination of major (Ca, K, Mg, and Na)and trace elements (As, Cd, Co, Li, Ni, and Sr)in human scalp hair. The proposed method includes a novel, simple, rapid, highly efficient, and automated metal-leaching procedure, by pressurized-liquid extraction (PLE), combined with a rapid simultaneous detection system-inductively coupled plasma-optical-emission spectrometry (ICP-OES). PLE is one of the most promising recently introduced samplepreparation techniques, with the advantages of reducing solvent consumption and enabling automated sample handling. The operating conditions for PLE, including concentration of the extraction solvent, extraction temperature, static time, number of extraction steps, pressure, mean particle size, diatomaceous earth (DE)mass/sample mass ratio, and flush volume were studied using an experimental design (Plackett-Burman design, PBD). The optimum conditions were use of 0.75 mol L-1 acetic acid as extracting solution and powdered hair samples thoroughly mixed with DE, as a dispersing agent, at a DE mass/sample mass ratio of 4. Extraction was performed at room temperature and an extraction pressure of 140 atm for 5 min in one extraction step. The flush volume was fixed at 60
650	1	4	_aPLE
650	1	4	_aACETIC ACID
650	1	4	_aMAJOR AND TRACE ELEMENTS
650	1	4	_aHUMAN SCALP HAIR
650	1	4	_aICP-OES
700	1	2	_aMoreda-Piñeiro, J.
700	1	2	_aAlonso-Rodríguez, E.
700	1	2	_aLópez-Mahía, P.
700	1	2	_aMuniategui-Lorenzo, S.
700	1	2	_aPrada-Rodríguez, D.
700	1	2	_aMoreda-Piñeiro, A.
700	1	2	_aBermejo-Barrera, P.
856	4	0	_uhttps://drive.google.com/file/d/13lrRPZmZFc3lcBg6M0kcKPk6I4ArNK8K/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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