微波消解-原子荧光光谱法同时测定白洋淀芦苇中砷和镉

采用微波消解一氢化物发生原子荧光光谱法同时测定芦苇中砷和镉，优化了试验条件。砷在0ug／L-80．0ug／L、镉在0ug／L～10．0ug／L范围内线性良好，检出限分别为0．010ug／L和0．012ug／L，样品测定的RSD为0．7％-2．0％，平均加标回收率为84．0％～107％。     

石墨炉原子吸收光谱法测定大气降水中镉镍铅

采用石墨炉原子吸收光谱法测定大气降水中镉、镍、铅，优化了试验条件。镉在0ug／L-5．00ug／L范围、镍和铅在0ug／L-20．0ug／L范围内线性良好，镉、镍、铅的检出限分别为0．03ug／L、0．79ug／L、1．37ug／L，大气降水样品测定的RSD为0．8％-2．6％，加标回收率为96．0％-106％。     

吹扫捕集-气相色谱法测定水中松节油

采用吹扫捕集-气相色谱法测定水中松节油，优化了试验条件。方法在0ug／L-625ug／L范围内线性良好，检出限为0．006mg／L，标准样品测定的相对标准偏差为3．4％，实际样品的加标回收率为88．0％-110％。     

气相色谱/质谱法测定环境毒饵中溴敌隆

采用气相色谱／质谱联用法测定环境毒饵中溴敌隆，优化了试验条件。方法在0mg／L～10．0mg／L范围内线性良好，检出限为0．01mg／kg，标准溶液测定的相对标准偏差为2．2％～4．6％，样品加标回收率为92．5％-96．3％。     

溶剂浮选分光光度法测定生活饮用水中铜

研究了1-（4-偶氮苯）-3-（4-溴苯）-三氮烯与铜的显色反应，建立了溶剂浮选分光光度法测定生活饮用水中铜的新体系，优化了试验条件，分析了共存离子对测定的干扰。方法在3．00mg／L-10．0mg／L范围内符合比尔定律，检出限为0．15μg／L，生活饮用水测定的RSD为2．7％，加标回收率为95．0％-98．8％。     

高效液相色谱法同时测定苯酚及其氯化中间产物

采用高效液相色谱法同时测定次氯酸钠氧化降解苯酚过程中苯酚及其5种氯化中间体，确定了检测波长，讨论了pH值对测定的影响。方法线性良好，苯酚、2-氯苯酚、4-氯苯酚、2，6-二氯苯酚、2，4-二氯苯酚、2，4，6-三氯苯酚的检出限分别为0．01mg／L、0．02mg／L、0．02mg／L、0．02mg／L、0．02mg／L、0．02mg／L，标准溶液测定的相对标准偏差≤0．8％，样品加标回收率为96．0％～102％。     

羊角铺水源水中极微量NO -2 - N的测定

建立了自制浮选器富集、分光光度法测定羊角铺水源水中痕量亚硝酸盐氮的方法，介绍了试验的注意事项。方法在0μg／L-4．00μg／L范围内线性良好，检出限为0．0002mg／L，RSD为2．0％-4．6％，加标回收率为94．0％-108％。     

高效液相色谱法测定水产品中四环素类抗生素残留

建立了固相萃取-高效液相色谱测定水产品中四环素类抗生素残留的方法，优化了前处理方法和色谱条件。方法在0mg／L-1．0mg／L范围内线性良好，四环素、土霉素和金霉素的检出限分别为0．02mg／kg、0．01mg／kg和0．05mg／kg，样品测定的RSD分别为6．8％、7．2％和8．5％，加标回收率分别为55．2％-81．0％、60．5％-70．5％和52．5％～73．5％。     

微波消解-石墨炉原子吸收法测定土壤中钒

建立了微波消解-石墨炉原子吸收测定土壤中钒的方法，优化了微波消解程序。方法在0μg／L～100μg／L范围内线性良好，以称样0．5000g、定容体积50mL计，方法检出限为0．2μg／g，环境土壤标准样品测定的RSD为2．5％，加标回收率为92．0％-104％。     

高效液相色谱法测定玉米作物中苯并(a)芘

采用超声提取-高效液相色谱法测定玉米作物中苯并（a）芘，优化了试验条件。方法在0mg／L-100mg／L范围内线性良好，检出限为0．15mg／L，玉米样品测定的相对标准偏差为5．3％～10．0％，加标回收率〉86．9％。     

微波萃取-气质联用测定土壤中的16种多环芳烃

用丙酮-正己烷(1:1体积比)混合溶剂,通过微波萃取法提取土壤中的16种多环芳烃组分。萃取溶液经硅胶小柱净化,最后用气相色谱-质谱法分析。以石英砂为基体进行加标回收测定。16种多环芳烃的检测限为0.18～0.53μg/kg,经精密度试验,相对标准偏差均5%,回收率在75.5%～108%之间。     

顶空气相色谱法在测定水中三氯乙醛的应用

研究以DB-624交联石英毛细管柱分离,微电子捕获检测器-顶空气相色谱法测定水中三氯乙醛的应用,与以往的方法相比,准确可靠、省工省时省试剂,符合"绿色分析化学"的要求。最低检出限为0.2μg/L,标准偏差为0.028μg/L,相对标准偏差为6.0%,加标回收率为88.7%～109%。     

The variability of PCDD/F concentrations in the effluent of wastewater treatment plants with regard to their hydrological environment

The occurrence, concentrations, patterns, and loads of 17 2,3,7,8-substituted congeners of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) were determined in treated wastewater collected at the outlets from 14 wastewater treatment plants (WTPs), divided into three size categories. The analysis also considered the effect of wastewater outflow on the final concentrations of PCDDs/Fs, as the samples were collected during flooding and stable hydrological conditions. None of the studied WTPs were found to completely remove toxic congeners of PCDDs/Fs from wastewater: the PCDD concentrations in the outgoing effluent during stable wastewater flow ranged from 2.99 to 177.19 pg/L, PCDFs from 6.05 to 51.30 pg/L, and the Toxic Equivalent (TEQ) was between 0.94 and 4.87 pg/L. The results from high wastewater flow were less diversified, ranging from 5.04 to 8.85 pg/L for PCDDs, from 11.47 to 32.33 pg/L for PCDFs and from 2.00 to 4.65 pg/L for TEQ. The smallest WTPs demonstrated the highest average total and TEQ concentrations due to limited volume, short retention time and outdated technology, and, hence, insufficient treatment efficiency. The largest WTPs have the potential to substantially affect the quality of river water, as despite being associated with the lowest concentrations, they released much greater volumes of treated wastewater and, hence, the greatest amounts of analyzed compounds. Elevated TEQ values were observed at high flow in all WTP size categories indicating the impact of high and stable wastewater flow on the concentrations of the observed PCDDs/Fs.     

气相色谱法测定柑橘和土壤中螺螨酯残留

以丙酮为提取剂,二氯甲烷为萃取剂,采用弗罗里硅土柱净化,气相色谱-电子捕获检测器测定柑橘和土壤中的螺螨酯残留,优化了样品前处理条件。方法在0.141μg/L～5.65 mg/L范围内线性良好,最低检出限为0.003 5 mg/kg,空白样品在0.050 mg/kg、0.500 mg/kg、1.00 mg/kg 3个添加水平上的平均回收率为82.2%～110%,平行测定的RSD为2.6%～9.8%。     

高效液相色谱法测定鸡蛋清和蛋黄中磺胺类药物残留

采用高效液相色谱法测定鸡蛋清和蛋黄中磺胺嘧啶、磺胺吡啶、磺胺二甲基嘧啶、磺胺甲氧哒嗪、磺胺甲恶唑、磺胺间甲氧嘧啶、磺胺喹恶啉等7种磺胺类药物残留,优化了色谱条件和样品预处理方法。7种磺胺类药物在0.050 mg/L~10.0 mg/L范围内线性良好,检出限和定量限分别低于0.02 mg/kg和0.04 mg/kg。在0.250 mg/kg和0.500 mg/kg两个添加水平,蛋清中的回收率为81.0%~100%,RSD为0.8%~4.8%,蛋黄中的回收率为72.2%~94.1%,RSD为1.1%~6.9%。     

气相色谱/质谱联用法测定饮用水源水中苯胺类化合物

采用液液萃取-气相色谱/质谱联用法测定饮用水源水中19种苯胺类化合物,选择DB-5MS色谱柱,讨论了pH值对回收率的影响.方法在0.500 mg/L～5.00 mg/L范围内线性良好,19种苯胺类化合物的检出限为0.016μg/L～0.067 μg/L,标准溶液平行测定的RSD为1.2％ -13.2％,实际样品加标回收...     

Organochlorine pesticide residue levels in blood serum of inhabitants from Veracruz, Mexico

The objective of the present study was to monitor the levels of organochlorine pesticides HCB; α-, β-, γ-HCH; pp'DDE; op'DDT; and pp'DDT in blood serum of Veracruz, Mexico inhabitants. Organochlorine pesticides were analyzed in 150 blood serum samples that constituted that which remained after clinical analyses, using gas chromatography-electron-capture detection (GC-ECD). The results were expressed as milligrams per kilogram on fat basis and micrograms per liter on wet weight. Only the following pesticides were detected: p,p'-DDE was the major organochlorine component, detected in 100% of samples at mean 15.8 mg/kg and 8.4 μg/L; p,p'-DDT was presented in 41.3.% of monitored samples at mean 3.1 mg/kg and 1.4 μg/L; β-HCH was found in 48.6% of the samples at mean 4.9 mg/kg and 2.7 μg/L; op'DDT was determined to be in only 3.3% of monitored samples at mean 2.7 mg/kg and 1.4 μg/L. The pooled samples divided according to sex showed significant differences of β-HCH and pp'DDE concentrations in females. The samples grouped according to age presented the third tertile as more contaminated in both sexes, indicating age as a positively associated factor with serum organochlorine pesticide levels in Veracruz inhabitants.     

梯度淋洗离子色谱法测定饮用水中6种阴离子

采用离子色谱法同时测定饮用水中F-、Cl-、Br-、NO3-、SO24-、PO34-等6种阴离子,水样经0.22μm滤膜过滤,自动淋洗发生器产生20 mmol/L～40 mmol/L KOH淋洗液梯度洗脱,在流量0.25 mL/min条件下采用IonPac AG19保护柱和IonPac AS19分离柱分离和定量。方法线性良好,6种阴离子的检出限为0.005 mg/L～0.057 mg/L,标准溶液平行测定6次,测定值的RSD在0.5%～2.2%之间,水样加标回收率在83%～106%之间。