A new method of constant-wavelength synchronous fluorescence spectrometry for simultaneous determination of Sudan Ⅱand Sudan Ⅲ was developed with using their fluorescence phenomenon.Only one single scan is needed fo...A new method of constant-wavelength synchronous fluorescence spectrometry for simultaneous determination of Sudan Ⅱand Sudan Ⅲ was developed with using their fluorescence phenomenon.Only one single scan is needed for effective identification and quantitative determination of the two compounds simultaneously when Δλ=60 nm is chosen.The linear ranges for Sudan Ⅱ and Sudan Ⅲ were 0—3.3 and 0—2.8 μg/mL,respectively.The detection limits for Sudan Ⅱ and Sudan Ⅲ were 14 and 11 ng/mL,respectively.By using this method,Sudan Ⅱand Ⅲ in sausage samples were determined directly with the recoveries of 83.8%—109.5%.展开更多
采用硝酸铊、偏钒酸钾、亚硫酸钠、二氧化锰为反应原料,经过水热法合成出了偏钒酸钾-硝酸铊纳米复合粉体,活化该复合粉体后考察其对苏丹红Ⅱ号的降解能力,并对粉体进行SEM、XRD、XPS表征。实验结果表明,偏钒酸钾掺杂量为2.5%(质量分数)...采用硝酸铊、偏钒酸钾、亚硫酸钠、二氧化锰为反应原料,经过水热法合成出了偏钒酸钾-硝酸铊纳米复合粉体,活化该复合粉体后考察其对苏丹红Ⅱ号的降解能力,并对粉体进行SEM、XRD、XPS表征。实验结果表明,偏钒酸钾掺杂量为2.5%(质量分数)的复合粉体具有最强的催化活性,25 mg的偏钒酸钾-硝酸铊纳米复合粉体可对200 m L浓度为1×10^(-3)mol/L的苏丹红溶液有效降解。展开更多
文摘A new method of constant-wavelength synchronous fluorescence spectrometry for simultaneous determination of Sudan Ⅱand Sudan Ⅲ was developed with using their fluorescence phenomenon.Only one single scan is needed for effective identification and quantitative determination of the two compounds simultaneously when Δλ=60 nm is chosen.The linear ranges for Sudan Ⅱ and Sudan Ⅲ were 0—3.3 and 0—2.8 μg/mL,respectively.The detection limits for Sudan Ⅱ and Sudan Ⅲ were 14 and 11 ng/mL,respectively.By using this method,Sudan Ⅱand Ⅲ in sausage samples were determined directly with the recoveries of 83.8%—109.5%.
文摘采用硝酸铊、偏钒酸钾、亚硫酸钠、二氧化锰为反应原料,经过水热法合成出了偏钒酸钾-硝酸铊纳米复合粉体,活化该复合粉体后考察其对苏丹红Ⅱ号的降解能力,并对粉体进行SEM、XRD、XPS表征。实验结果表明,偏钒酸钾掺杂量为2.5%(质量分数)的复合粉体具有最强的催化活性,25 mg的偏钒酸钾-硝酸铊纳米复合粉体可对200 m L浓度为1×10^(-3)mol/L的苏丹红溶液有效降解。
