在司法鉴定及与之相关的商品检验工作中,有时需要测定红色墨水中的染料组成。有些红色墨水中的红色成分由酸性大红3R 和弱酸红 A 两种染料混合配制而成,这两种染料的吸收光谱重叠,相互干扰。本文建立了多波长线性回归分光光度法同时测...在司法鉴定及与之相关的商品检验工作中,有时需要测定红色墨水中的染料组成。有些红色墨水中的红色成分由酸性大红3R 和弱酸红 A 两种染料混合配制而成,这两种染料的吸收光谱重叠,相互干扰。本文建立了多波长线性回归分光光度法同时测定红墨水中酸性大红3R 和弱酸红 A 的方法,可消除酸性大红3R 和弱酸红 A 的相互干扰,同时测定两种染料的浓度。实验测定了酸性大红3R 和弱酸红 A 在400-600nm 波长范围的吸收光谱;考察了两染料的吸光度的线性范围,进行了两染料混合标准液的吸光度加合性实验,结果表明,在450～580nm 波长区间和0-40mg/L 浓度范围内,两种染料均服从 Beer定律(r>0.996),具有良好的线性和吸光度加合性。实验选择了在波长500-530nm 区间每隔2nm 的16个波长作为测定和回归波长。考察了方法的精密度和准确度,结果测得酸性大红3R 的回收率为94.0～104.5%,RSD 为2.4～4.3%;弱酸红 A 的回收率为98.0～104.0%,RSD 为2.1～4.6%。本方法测定了红墨水样品中酸性大红3R 和弱酸红 A 的配比,结果令人满意。展开更多
A low-cost adsorbent was prepared from sludge and straw by pyrolysis in a dried state with the surface area of the adsorbent of 829.49 m2·g?1,micropore volume of 0.176 cm2·g?1 and average pore radius of 5.0 ...A low-cost adsorbent was prepared from sludge and straw by pyrolysis in a dried state with the surface area of the adsorbent of 829.49 m2·g?1,micropore volume of 0.176 cm2·g?1 and average pore radius of 5.0 nm.The kinetic,equilibrium isotherm and thermodynamic characteristics of trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4′,6,8-trisulphonate(acid scarlet 3R)onto the adsorbent from sludge and straw were investigated.The results indicated that the pseudo second order adsorption was the predominant adsorption mechanism of acid scarlet 3R.Thus,the adsorption phenomenon was suggested as a chemical process.The adsorption data were fitted better with Langmuir model than Freundlich model,indicating that the adsorption of acid scarlet 3R belonged to the monolayer adsorption and mainly occurred in micropores.展开更多
文摘在司法鉴定及与之相关的商品检验工作中,有时需要测定红色墨水中的染料组成。有些红色墨水中的红色成分由酸性大红3R 和弱酸红 A 两种染料混合配制而成,这两种染料的吸收光谱重叠,相互干扰。本文建立了多波长线性回归分光光度法同时测定红墨水中酸性大红3R 和弱酸红 A 的方法,可消除酸性大红3R 和弱酸红 A 的相互干扰,同时测定两种染料的浓度。实验测定了酸性大红3R 和弱酸红 A 在400-600nm 波长范围的吸收光谱;考察了两染料的吸光度的线性范围,进行了两染料混合标准液的吸光度加合性实验,结果表明,在450～580nm 波长区间和0-40mg/L 浓度范围内,两种染料均服从 Beer定律(r>0.996),具有良好的线性和吸光度加合性。实验选择了在波长500-530nm 区间每隔2nm 的16个波长作为测定和回归波长。考察了方法的精密度和准确度,结果测得酸性大红3R 的回收率为94.0～104.5%,RSD 为2.4～4.3%;弱酸红 A 的回收率为98.0～104.0%,RSD 为2.1～4.6%。本方法测定了红墨水样品中酸性大红3R 和弱酸红 A 的配比,结果令人满意。
基金Supported by the Shanxi Science and Technology Agency Research Project(20100321085)the Scientific Research Foun-dation of the Shanxi Education Department(20111029)
文摘A low-cost adsorbent was prepared from sludge and straw by pyrolysis in a dried state with the surface area of the adsorbent of 829.49 m2·g?1,micropore volume of 0.176 cm2·g?1 and average pore radius of 5.0 nm.The kinetic,equilibrium isotherm and thermodynamic characteristics of trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4′,6,8-trisulphonate(acid scarlet 3R)onto the adsorbent from sludge and straw were investigated.The results indicated that the pseudo second order adsorption was the predominant adsorption mechanism of acid scarlet 3R.Thus,the adsorption phenomenon was suggested as a chemical process.The adsorption data were fitted better with Langmuir model than Freundlich model,indicating that the adsorption of acid scarlet 3R belonged to the monolayer adsorption and mainly occurred in micropores.
