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Measured solubility of sodium 4-nitrobenzenesulphonate in aqueous solutions of sodium chloride, sodium sulfate and ethanol are presented in Tables 1, 2 and 3, respectively. The corresponding solubility curves are shown in Figures 1, 2 and 3. Because the polarity of drug is closer to the first, the solubility of sodium 4-nitrobenzenesulphonate in water is higher than that in sodium chloride, sodium sulfate or ethanol aqueous solutions. Figures 1 to 3 further illustrate that the solubility of sodium 4-nitrobenzenesulphonate in sodium chloride + water is lower than that in ethanol + water solvent mixtures or sodium sulfate + water mixture at the same conditions. Sodium chloride + water mixture is the best solvent mixture for purifying sodium 4-nitrobenzenesulphonate. The relationship between temperature and solubility of sodium 4-nitrobenzenesulphonate is correlated by a modified Apelblat equation, |
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תÍäΪÄãÏàÓö: ½ð±Ò+15, ·ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú 2012-04-26 22:56:55
Mally89: ½ð±Ò+1 2012-05-07 17:02:21
sltmac: ½ð±Ò+5 2012-05-14 08:26:25
תÍäΪÄãÏàÓö: ½ð±Ò+15, ·ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú 2012-04-26 22:56:55
Mally89: ½ð±Ò+1 2012-05-07 17:02:21
sltmac: ½ð±Ò+5 2012-05-14 08:26:25
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