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luoerfeng銅蟲(chóng) (初入文壇)
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[求助]
克拉夫點(diǎn)
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| 求助克拉夫點(diǎn)的詳細(xì)測(cè)量方法，有相關(guān)資料和文獻(xiàn)的， 分享給我吧 萬(wàn)分感謝！ |
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【答案】應(yīng)助回帖
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The Krafft points were determined photometrically, using the same home-made apparatus as that used by Tokiwa and Matsumotoe for cloud point measurements of nonionic surfactant solutions. The transmittance of light through sample solutions and the temperature of the solution measured with a thermister were plotted on an X-Y recorder. The temperature at which the transmittance equalled that of pure water was taken as the Krafft point. The reproducibility of the measured Krafft points was within f0.3 "C. The Krafft points of DAPA were measured at its isoelectric point (pH 6.6 f 0.1'O). |
3樓2012-12-21 14:48:34
2樓2012-12-21 14:46:53
【答案】應(yīng)助回帖
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Procedures. Krafft Point and Cmc Measurements. The Krafft point was determined from the abrupt increase in the electrical conductivity as a function of temperature. Conductivity was measured after the solution equilibrium was attained at a given temperature in a thermostat controlled to within f0.02 "C. Cmc was measured by the electrical conductivity- concentration curve at constant temperature. |
4樓2012-12-21 14:49:47
luoerfeng
銅蟲(chóng) (初入文壇)
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- 專(zhuān)業(yè): 有機(jī)化工
5樓2012-12-21 20:34:08
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