| 第 32 卷第 6 期 |  | Vol. 32 No. 6 | | 2002 年 12 月 | Dec 2002 |
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所屬欄目：分析與測試
溴百里酚藍標記分光光度法測定廢水中季胺鹽型表面活性劑 |
| 吳美芝; 劉亞利; 曾明(湖南工業(yè)科技職工大學(xué); 410018) |
| 摘 要：基于溴百里酚藍在 pH7.5～ 8 5的磷酸鹽緩沖介質(zhì)中 ,與陽(yáng)離子表面活性劑發(fā)生離子締合反應 ,而使溴百里酚藍褪色這一現象 ,建立了分光光度測定陽(yáng)離子表面活性劑的新方法。該方法靈敏度高 ,選擇性好。最大測定波長(cháng)位于 6 15nm ,摩爾吸光系數為 2 1× 10 - 4L .mol- 1.cm- 1,表面活性劑的濃度在 0～ 2 0 0 μg/ 2 5ml范圍內 ,符合比爾定律。環(huán)境樣品中常見(jiàn)金屬離子均不干擾測定 ,直接應用于工業(yè)廢水中陽(yáng)離子表面活性劑含量的測定 ,獲得了滿(mǎn)意的結果。 |
| 關(guān)鍵詞：溴百里酚藍; 陽(yáng)離子表面活性劑; 分光光度法 |
| 中圖分類(lèi)號：TQ014 文獻標識碼：A 文章編號：1009-9212(2002)06-0055-03 |
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| Determination of Cationic Surface-active Agent by Marker Bro-mothymol Blue Spectrophotometric Methods |
| WU Mei-zhi; et al. （ Hunan Workers and Staffs College of Science and Technology; Changsha; 410118 China ） |
| Abstract：Based on the associated reactions of bromothymol blue with cationic surface- active agent when put in phosphate buffer solution of pH7.5～8.5 and fades, a new way for determination of cationic surfactant by Spectrophotometric methods was established. Great sensitivity and wide selectivity are featured. The maximum wavelength is measured in 615 nm,molar absortion coefficient in 2.1×10 4 L·mol -1 cm -1 .concentration of surfacant in 0～200μg/25 ml, which complies with Bill-law. In the presence of... |
| Key words：bromothynol blue; cationicsurfactant; spec-trophotonietric methods |
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收稿日期：2002-04-22
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