【摘 要】
：
建立大气细颗粒物(PM2.5)中16种多环芳烃(PAHs)的快速溶剂提取-直接进样-高效液相色谱测定方法。PM2.5经玻璃纤维滤膜收集,采样后的滤膜直接用乙腈经快速溶剂萃取仪提取,以乙
论文部分内容阅读
建立大气细颗粒物(PM2.5)中16种多环芳烃(PAHs)的快速溶剂提取-直接进样-高效液相色谱测定方法。PM2.5经玻璃纤维滤膜收集,采样后的滤膜直接用乙腈经快速溶剂萃取仪提取,以乙腈和水作为流动相,提取液通过ZORBAX Eclipse PAH液相色谱柱分离,紫外串联荧光检测器检测。16种PAHs分离效果良好,在0.025~5.000μg/m L范围内线性相关系数r≥0.9998,方法加标回收率为78.3%~113.2%,相对标准偏差为0.5%~9.5%,检出限为0.007~0.062 ng/m~3。本方法操作简便、快速、准确、灵敏,适于PM2.5中16种PAHs的同时测定。
其他文献
By using the method in[3],several useful estimations of the derivatives of the solutionof the boundary value problem for a nonlinear ordinary differential equat
This paper proposes a formally stronger set-valued Caristi’s fixed point theorem and by using a simple method we give a direct proof for the equivalence betwee
In this paper,the step reduction method is discussed,which was advanced by Prof.YehKai-yuan for calculating a non-uniform beam with various sections.The followi
Based on the hydrodynamic stability theory of distorted laminar flow and the kind ofdistortion profiles on the mean velocity in parallel shear flow given in pap
赛默飞世尔科技公司（以下简称“赛默飞”）不久前发布精盐水中氯酸根和硫酸根的检测方案.氯碱工业属于基本化工原料行业,盐水中氯酸根和硫酸根的存在对隔膜、离子膜生产有极大的
晚清民初的上海,既是国家门户开放,中外观念碰撞的一大空间,也是＂竹枝词＂空前繁荣的一个胜地。如果说,条约口岸的地理空间造就了一大批＂条约口岸知识分子＂,那么,通过对于这一时期流传的竹枝词中＂夷＂＂洋＂等涉及民族观念词汇的语料库语言学分析,则可以较为清楚地看到在国家社会转型时期,这批条约口岸知识者的民族文化观念是如何由直呼为＂夷＂,到＂夷＂＂洋＂混用,再到去＂夷＂用＂洋＂,表达出自己在传统与现代之间徘徊的心境,由此也可看到传统知识分子向近代知识分子嬗变的一个轨迹。
In this paper,we discuss J-integrals near modelsⅠandⅡcrack tips for the plates oflinear-elastic isotropic homogeneous material and orthotropic composite mater
In this paper,the conception of fractal geometry derived from geometric inversion isintroduced.A ramified self-inverse fractal with symmetry and a self-inverse
In this paper,by using functional analysis and integral equation method,we obtainsome results about the properties of far field of acoustic waves in an inhomoge
In this paper,the Gibbs-Appell’s equations of motion are extended to the most generalvariable mass nonholonomic mechanical systems.Then the Gibbs-Appell’s equ