Comparative evaluation of the pH of calcium hydroxide powder in contact with carbon dioxide (CO2)

被引：0
|
作者：
De Mendonça Cavalcante A. [1 ,3 ]
De Souza Lima J.C. [2 ]
De Melo Santos L. [3 ]
De Oliveira P.C.C. [2 ]
Ribeiro Jr. K.A.L. [1 ]
Sant'ana A.E.G. [1 ]
机构：
[1] Laboratório de química de produtos naturais - LPqRN, Universidade Federal de Alagoas, Instituto de Química e Biotecnologia (IQB), Tabuleiro dos Martins 57072-970 Maceió - AL, Br 101
[2] Laboratório de Química Analítica, Universidade Federal de Alagoas, Centro de Ciências Exatas e Naturais (CCEN), Tabuleiro dos Martins 57072-970 Maceió - AL, Campus A. C. Simões, BR 104
[3] Laboratório de Dentística e Endodontia, Faculdade de Odontologia da Universidade Federal Alagoas - FOUFAL, Centro de Ciências da Saúde (CSAU), Tabuleiro dos Martins 57072-970 Maceió - AL, Campus A. C. Simões, BR 104
来源：
Materials Research | 2010年 / 13卷 / 01期
关键词：
Calcium hidroxide; Dioxide carbon; Ph evaluation;
D O I：
10.1590/s1516-14392010000100002
中图分类号：
学科分类号：
摘要：
This work involved an evaluation of calcium hydroxide powder in the absence and presence of CO2. 0.12g of calcium hydroxide powder was used for each of 16 aliquots diluted in 100 mL of deionized water and distributed in 2 samples of 8 aliquots. The indices of pOH, [OH-] and [Ca++] were obtained by mathematical calculations after determining the pH. The results demonstrated that in the presence of CO2, calcium hydroxide showed a marked loss of [OH-] and [Ca++] in relation to the decrease in pH. However, the high alkaline pH of the calcium hydroxide powder was preserved in the absence of CO2, maintaining its reparative and antimicrobial properties.
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页码：1 / 4
页数：3
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