Focused-microwave-assisted digestion of encapsulated lubricating oils:: Gradual sample addition to pre-heated acid

被引：15
作者：
Bressani, Flavia A. [1 ]
Silva, Hamilton O.
Nobrega, Joaquim A.
Costa, Leticia M.
Nogueira, Ana Rita A.
机构：
[1] Univ Fed Sao Carlos, Dept Quim, BR-13560970 Sao Carlos, SP, Brazil
[2] Univ Fed Minas Gerais, Dept Quim, Belo Horizonte, MG, Brazil
[3] Embrapa Pecuaris Sudeste, Sao Carlos, SP, Brazil
来源：
QUIMICA NOVA | 2006年 / 29卷 / 06期
关键词：
encapsulated lubricating oil; sample addition; focused-microwave;
D O I：
10.1590/S0100-40422006000600012
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The applicability of the recently proposed procedure based on gradual sample addition to microwave-assisted pre-heated concentrated acid is limited by the sample viscosity. In this work, lubricating oil samples with high viscosity were encapsulated and manually added to the microwave-assisted pre-heated concentrated digestion mixture. The procedure was applied for determination of Al, Ca, Cr, Cu, Fe, Mg, Ni, P, Pb, Si, Sri, Sr, V, W, and Zn in lubricating oil by inductively coupled plasma optical emission spectrometry (ICP OES). Determined and certified values for Ca, Mg, P, and Zn in lubricating oil were in agreement at a 95% confidence level.
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页码：1210 / 1214
页数：5
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