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建立了气相色谱-串联质谱法快速测定全棉织物、聚酯织物、羊毛织物、腈纶织物、合成革织物、棉和氨纶复合织物、羊毛和腈纶复合织物、棉和聚酯复合织物、羊毛和聚酯复合织物9类生态纺织品织物中24种禁用偶氮染料的检测方法。不同种类的纺织品根据成分的不同进行了不同的前处理过程,然后用甲醇进行定容。考察了不同样品基质对回收率的影响,方法的定量限为0.05~0.20 mg/kg,不同基质不同浓度的加标回收率在29.4%~102.8%之间(添加水平为0.20、0.40、1.0 mg/kg,n=6),相对标准偏差6.8%,该方法的检出限小于我国和欧盟检测标准中对24种禁用偶氮染料的限量要求。 相似文献
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欧盟REACH法规是一项化学品管理法规,它的实施将会对我国企业产生重大影响。面对法规的实施,我国企业家应如何应对,就这些问题有关专家提出了理性的思考以及有参考价值的意见和建议。 相似文献
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对三种危险品分类与标签体系:欧盟指令67/548/EEC和1999/45/EC、GHS和欧盟危险品分类、包装与标签提案进行了介绍.欧盟提案应用GHS的危险品分类体系,对欧盟指令67/548/EEC附录Ⅰ危险物质一览表重新分类制作了新的危险物质一览表,结合了欧盟指令67/548/EEC和GHS的标签内容,是一个完整的危险品分类与标签体系. 相似文献
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欧盟REACH法规是涵盖了化学品生产、贸易和使用安全的综合性法规,是迄今为止关于化学品管理最为复杂的法规,在全球备受关注,被认为是中国入世以来面临的最为复杂的技术性贸易壁垒。介绍了欧盟REACH法规的主体内容,包括注册、许可、授权和限制。对于法规给我国相关化工企业造成成本增加的影响,提出了应对策略和建议。 相似文献
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欧盟REACH法规是涵盖了化学品生产、贸易和使用安全的综合性法规,是迄今为止关于化学品管理最为复杂的法规,在全球范围内备受关注,被认为是中国入世以来面临的最为复杂的技术贸易壁垒。主要阐述了法规出台、注册时间和成本构成,对上海化学品企业以及华谊集团进出口贸易成本增加的影响,提出了具体的应对欧盟REACH法规的策略和建议。REACH法规是产品进入欧盟市场的通行证,上海企业只有积极应对,才能保证对欧贸易的畅通无阻。 相似文献
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Ricardo Salazar Sergi Garcia-Segura M.S. Ureta-Zañartu Enric Brillas 《Electrochimica acta》2011,56(18):156
Solutions of the azo dyes Disperse Red 1 (DR1) and Disperse Yellow 3 (DY3), commonly used in the Chilean textile industry, in 0.1 mol dm−3 Na2SO4 and 0.5 mmol dm−3 Fe2+ of pH 3.0 were comparatively degraded by electro-Fenton (EF) and solar photoelectro-Fenton (SPEF) using a 2.5 dm3 recirculation flow plant containing a BDD/air-diffusion cell coupled with a solar photoreactor. Organics were oxidized in EF with hydroxyl radicals formed at the anode surface from water oxidation and in the bulk from Fenton's reaction between electrogenerated H2O2 and added Fe2+. The oxidizing power of SPEF was enhanced by the additional production of hydroxyl radicals from the photolysis of Fe(III) hydrated species and the photodecomposition of Fe(III) complexes with intermediates by UV light of solar irradiation. Total decolorization, complete dye removal and almost overall mineralization for both dye solutions were only achieved using the most potent SPEF process, yielding higher current efficiencies and lower energy consumptions than EF. Final carboxylic acids like pyruvic, acetic, oxalic and oxamic were detected during the SPEF treatments. NO3− ion was released as inorganic ion. The use of a solution pH of 2.0–3.0 at 50 mA cm−2 was found preferable for SPEF. Synthetic textile dyeing solutions containing the dyes were treated under these conditions yielding lower decolorization rate, slower dye removal and smaller mineralization degree than only using 0.1 mol dm−3 Na2SO4 due to the parallel oxidation of organic dyeing components. However, lower energy consumptions were obtained by the destruction of more amounts of total organic carbon, indicating that SPEF is a useful and viable method for the remediation of textile industrial wastewaters with high contents of disperse azo dyes. 相似文献
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偶氮染料的光还原脱色及其染色废水的回用研究 总被引:1,自引:0,他引:1
用还原脱色剂对水溶性偶氮染料进行光还原脱色降解,重点考察了还原脱色剂、辐射光以及染料浓度等对还原脱色反应的影响,并将脱色后的染色废水回用于棉织物染色中.结果表明,以适当比例的引发剂和促进剂组成的还原脱色剂具有较强的脱色降解能力,辐射光对染料的还原脱色反应具有明显的促进作用,染料浓度的提高不利于染料的脱色降解反应.脱色废水可以回用于棉织物的活性染料染色中,通过降低染色过程中氯化钠和碳酸钠的添加量,可使染色试样与自来水染色试样的总色差(DE*)<1.0. 相似文献
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针对目前钾肥生产中反浮选药剂测定难度大,建立了一种气相色谱-质谱联用法直接测定痕量十二烷基吗啉的方法。样品溶解后经正己烷3次萃取待测,仪器条件:色谱柱TG-5MS,长度为30 m,内径为1.9 μm,膜厚度为0.25 μm;质谱参数:EI源,离子源温度为240 ℃,毛细管温度为250 ℃,进样量为1 μL,流速为1 mL/min,气相色谱分流比为40:1,色谱柱柱温选择程序升温。该方法标准工作曲线线性较好,精密度、回收率均满足分析的要求,相对标准偏差≤2%,方法的检测限为0.15 μg/mL,定量限为0.5 μg/mL。 相似文献
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偶氮染料废水的厌氧好氧处理工程实例 总被引:8,自引:0,他引:8
介绍了以吸附过滤、上流式厌氧污泥床(UASB)生物接触氧化法相结合的工艺处理偶氮染料废不的工程实例及有关的参数。废水经过中和沉淀、吸附可去除29.7%的COD,再经UASB处理,可去除58.9%的COD,厌氧处理系统内形成颗粒污泥,厌氧出水经生物接触氧化法,可去除80.7%的COD,二沉池出水COD降至150mg/L以下,达到国家污水综合排放一级标准。 相似文献
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建立了高效液相色谱-质谱(HPLC-MS/MS)同时测定染发剂中33种禁限用染料的方法。样品用甲醇和2 g/L抗坏血酸水溶液的混合溶液溶解,正己烷净化,以5 mmol/L的乙酸铵水溶液和乙腈为流动相进行梯度洗脱,经Agilent ZORBAX Extend C18柱(2.1 mm×100 mm,1.8μm)分离。在电喷雾离子模式下,采用多重反应监测模式(MRM)进行定性和定量分析。33种染料在相应的质量浓度范围内线性关系良好,线性相关系数均大于0.99,检出限为0.01~29.5 mg/kg,回收率为71%~115%。 相似文献
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JP Siqueira DS dos Santos Jr L Misoguti ON Oliveira CR Mendonça 《Polymer International》2007,56(10):1288-1291
The photoinduced birefringence arising from trans–cis–trans isomerization has been studied in chitosan cast films doped with the azo dye Ponceau‐S. The chitosan/Ponceau‐S films are highly resistant to several solvents, which allowed the study of their optical storage features after immersion in various solvents. We demonstrate that the induced birefringence and its dynamics are influenced by the solvent. From experiments using such different solvents as water, dimethylsulfoxide, ethylene glycol, methanol and chloroform, it was found that the induced birefringence and the writing rate increase linearly with the dielectric constant of the solvent. At high dielectric constant, photoinduced molecular reorientation is facilitated, leading both to a larger birefringence and faster dynamics. Copyright © 2007 Society of Chemical Industry 相似文献