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基于碱性介质中,氯霉素对H2O2-鲁米诺化学发光体系有增敏作用,结合流动注射分析,建立了一种流动注射-化学发光法灵敏检测氯霉素的方法。结果表明,最佳实验条件为:流路选择氯霉素和KMnO4先混合,再注入鲁米诺(NaOH)溶液中;氧化剂选择H2O2,其浓度为6.0×10-4mol/L;鲁米诺中NaOH的浓度为8.0×10-5mol/L;鲁米诺浓度为1.0×10-4mol/L;选择混合管长度为5 cm。在最佳条件下,该方法检测氯霉素的线性范围为8.0×10-8~1.0×10-5g/mL,检出限(3σ)为5×10-8g/mL,对5×10-7g/mL氯霉素进行11次平行测定,相对标准偏差(RSD)为1.3%。用该法对氯霉素胶囊中氯霉素的含量进行了测定。 相似文献
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2018年水产品国家食品安全监督抽检结果分析 总被引:1,自引:0,他引:1
目的 分析2018年我国水产品的食品安全形势。方法 汇总2018年水产品国家食品安全监督抽检结果, 对其不合格项目等信息进行分析。结果 2018年共抽检水产品1248批次, 检出不合格样品58批次, 总体合格率为95.4%, 其中鱼类的合格率为96.8%, 虾类和贝类的合格率分别为93.8%和91.1%, 蟹类的合格率仅为81.3%。淡水鱼和海水鱼的不合格原因主要是恩诺沙星残留超标, 贝类的不合格原因主要是检出禁用兽药氯霉素, 海水虾和海水蟹的不合格原因主要是镉超标。结论 蟹类、贝类、虾类等水产品的合格率偏低, 不合格原因主要是违规使用兽药和镉污染。 相似文献
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Ruey‐Shin Juang Rong‐Tzong Wu 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1999,74(12):1165-1170
The kinetics for extraction recovery of acetate ions from simulated waste streams in chloromycetin production by Aliquat 336 (a quaternary amine) and tri‐n‐butylphosphate (TBP) in xylene were examined using a microporous membrane‐based stirred cell. The waste stream typically contained 15.4% acetic acid, 8.8% sodium acetate, and 4.7% (w/w) NaCl. The stirred cell could give intrinsic rates for formation of the complex occurring at or near the organic–aqueous interface. It was shown that the extraction rate with TBP was higher than that with Aliquat 336. The effect of temperature (288–318 K) on the reaction rate with TBP was also examined and the activation energy (54.5 kJ mol−1) was obtained. © 1999 Society of Chemical Industry 相似文献
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