Determinação espectrofotométrica de cloreto em cimento após preparo de amostra por piroidrólise

Química Nova

Fabio A. Duarte²  Ederson R. Pereira²  Eder L. M. Flores¹  Edson I. Muller¹  Erico M. M. Flores¹  Valderi L. Dressler¹ 

[1] ,Universidade Federal do Rio Grande Escola de Química e Alimentos Rio Grande RS ,Brasil

关键词: pyrohydrolysis;    chloride;    cement;   

DOI  :  10.1590/S0100-40422013000500017

来源: SciELO

【 摘 要 】

A method based on pyrohydrolysis was proposed for cement sample preparation and further chloride determination by spectrophotometry using flow injection analysis. Analytical parameters were evaluated and, under the selected conditions, the calibration curve was linear in the range of 0.2 to 10.0 µg mL-1 with r2 = 0.998. The limit of detection was5 µg g-1 of chloride and the relative standard deviation was less than 7%. The proposed pyrohydrolysis method is relatively simple and can be used for sample preparation for further spectrophotometric determination of low concentrations of chloride in cement.

【 授权许可】

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