The Application Of New Materials In The Analysis Of Polycyclic Aromatic Hydrocarbons

Polycyclic aromatic hydrocarbons(PAHs) are one of the most widespread and the most harmful persistent organic pollutants. Due to its great carcinogenic, teratogenic, mutagenic effects, PAHs becomes an increasing threat to the ecological environment and human health. This dissertation aims at screening and synthetizing high performance absorbent, increasing the concentration efficiency of SPE, developing new SPE-HPLC analytical methods of PAHs. It consists of five chapters as following.In Chapter one, the detection methods of PAHs was reviewed. It includes the harm, pretreatment methods and detection means of PAHs; the extraction mode, operation procedure and absorbent type of PAHs;the structure, synthesis methods and application of the new material MOFs; the main contents of this thesis.In chapter two, the main physicochemical properties of 10 kinds of 10 PAHs used in paper was introduced, the experimental apparatus built for SPE was described in detail.In Chapter three, a sensitive PAHs SPE-HPLC analytical method was built, while Cu(II) isonicotinate as adsorbent of SPE. The different effect factor in SPE and HPLC procedures was discussed, such as water sample volume, water volume pH, the mass of adsorbent, and so on. Under the optimization conditions, for Naphthalene, acenaphthylene, acenaphthene, phenanthrene, anthracene, fluoranthene, pyrene and benzoanthracene, the linearity range were 0.12-250, 0.16-250, 0.06-250, 0.04-50, 0.04-20, 0.02-100, 0.05-100 and 0.01-100 μg/L, respectively; the detection limits were 123.50, 15.70, 6.23, 4.19, 3.98, 2.49, 5.20 and1.26 ng/L, respectively; while the recoveries were 88.54%, 88.67%, 95.94%, 97.63%, 89.59%, 81.04%, 88.91% and 85.08%, respectively.In Chapter four, under gradient elution mode, nine kinds of PAHs, including Naphthalene, acenaphthylene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzoanthracene and benzopyrene, was extracted and separated while Mil-53(Al) as adsorbent. Under the optimization conditions, the linearity range of nine of PAHs were 53.09-437.5, 34.49-437.5, 0.73-62.5, 0.09-62.5, 0.04-25, 0.10-125, 0.13-125, 0.03-125 and 0.02-62.5 μg/L, respectively; the detection limits were 5300, 3449, 72.58, 8.54, 3.71, 10.35, 13.00, 2.63 and 1.93 ng/L, respectively; while the recoveries were 95%-132%.In Chapter five, the Adsorption properties of etched stainless steel powder was primary studied. The different effect factor in SPE procedures was investigated, such as etched time, water volume pH, the mass of adsorbent, and so on. The feasibility that etched stainless steel powder was used as SPE adsorbent was discussed. And the optimization SPE conditions were obtained.