A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2007; you can also visit the original URL.
The file type is
Recebido em 15/8/01; aceito em 12/12/01 NATURAL pH INDICATORS: USING PAPER OR SOLUTION? In this work, the fruit extracts of Morus nigra -mulberry, Syzygium cuminii -jambolão, Vitis vinifera -grape, Myrciaria cauliflora -jabuticaba are suggested as pH indicators in the form of either solutions or paper. The pH indicator solutions were prepared by soaking the fruits or their peels in ethanol 1:3 (m/V) for 24 h, followed by simple filtration. The pH indicator papers were prepared by imersion ofdoi:10.1590/s0100-40422002000400026 fatcat:limazr52zbfw5p42hdtxrt7erm