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1.
土壤中残留的三种有机磷农药快速分析方法的研究   总被引:1,自引:0,他引:1  
本文介绍一种简便,快速的前处理和气相色谱法测定土壤中甲胺磷.乐果及甲基—1605残留量。选择甲醇—丙酮混合溶剂为萃取剂,振荡后取未经净化及浓缩的上清液直接进样。样品加标回收率分别为85.7%,93.4%,92.0%;最低检出浓度分别为0.1mg/kg,0.005mg/kg,0.005mg/kg。  相似文献   

2.
选择较有代表性的宁波市郊慈镇作为典型,调查分析了铜业乡镇企业对周围农业环境的污染情况。调查结果表明,污染源附近水域水质铜含量为0.009~8.461mg/L,超标率为43.8%,锌为0.02~5.92mg/L,超标率为37.5%。土壤中铜的含量为33.1~326.2mg/kg,超标率为72.2%。粮食中铜含量为2.19~24.20mg/kg,超标率为37.5%。  相似文献   

3.
植物酯酶片快速测定蔬菜上有机磷农药   总被引:15,自引:1,他引:14  
介绍了一种能简便快速测定蔬菜表面有机磷农药的植物酯酶片。它具有价格低,易获取,稳定性好等特点,适用于田间、农贸市场和家庭无仪器设备条件下检测有机磷农药的危险水平。对常用几种有机磷农药,其检测限在0.06mg/kg ̄10.0mg/kg范围。  相似文献   

4.
研究小东江水闸至斜岭全程10Km河段底质中石油和酚类污染物含量的沿程分布,并对底质进行浸溶试验,结果表明,该河段底质中石油平均含量为27.58mg/kg,酚类为0.098mg/kg,石油平均浸出率为35%,酚类平均浸出率为49%,在一定的条件下,可能导致水体的二次污染。  相似文献   

5.
毛细管气相色谱法分析土壤中有机氯农药   总被引:3,自引:0,他引:3  
不分流毛细管气相色谱法分析土壤中有机氯农药,可解决样品某些干扰问题。666与DDT各组分的检测限分别为≤0.0005和≤0.002mg/kg。  相似文献   

6.
气相色谱法测定废水和废气中N‘,N—二甲基甲酰胺   总被引:3,自引:0,他引:3  
以气相色谱石英毛细管柱分离,FID检测,测定废水和废气中N’,N-二甲基甲酰胺(DMF),在1.0mg/L ̄1881.0mg/L范围内有良好的线性关系,检测限:废水为0.5mg/L;废气为0.8mg/m^3,样品测定的相对标准差为4% ̄8%,回收率在76% ̄112%之间,精密度和准确度均较好。  相似文献   

7.
青铜峡铝厂氟污染对广武乡玉米影响的调查分析   总被引:1,自引:0,他引:1  
监测了青铜峡铝厂东南方向4.5km的广武乡玉米叶,得知含氟量为43.94-166.1mg/kg,对照样品树新林场玉米叶的含氟均值为13.15mg/kg,广武乡的玉米受到了严重的氟污染,农作物减产严重。  相似文献   

8.
石墨炉原子吸收法测定废水中锑   总被引:3,自引:0,他引:3  
以钯作基改进剂建立了测定废水中锑的石墨炉原子吸收光谱分析法。方法线性范围为0mg/L-10mg/L,检测限为0.02mg/L。相对标准差为3%,回收率为96.7%-101.3%,结果令人满意。  相似文献   

9.
光离子化检测器便携式气相色谱仪快速测定空气中苯系物   总被引:3,自引:0,他引:3  
本文研究了使用光离子化检测器便携式气相色谱仪,直接测定空气中mg/m3级苯系物(苯、甲苯、乙苯、邻、间、对位的二甲苯及异丙苯)的快速分析方法。方法的线性范围为0~100mg/m3,相关系数均在0.999以上,方法的变异系数分别为2.9~12.5%(5mg/m3),3.4~7.9%(30mg/m3),方法最低检测限达0.2~1.0mg/m3。  相似文献   

10.
邻苯二胺和铜之间的催化反应,其催化反应后的产物用极谱法测定了时产生灵敏的催化波,利用这一特性可以对邻苯二胺或痕量铜进行测定,其催化电位Ep=-0.38V,铜的检出限为0.02mg/L,邻苯二胺的检出限为0.80mg/L。  相似文献   

11.
三峡库区重庆段淹没区土壤重金属分布及评价   总被引:3,自引:0,他引:3  
三峡库区重庆段淹没区土壤重金属含量均低于国家土壤环境标准三级,其中铜含量范围为10.7~80.2mg/kg,均值为37.0 mg/kg;铅含量范围为14.6~51.8mg/kg,均值为29.3mg/kg;锌含量范围为47.5~93.3mg/kg,均值为72.7mg/kg;镉含量范围为0.084~0.765mg/kg,均值为0.321mg/kg;汞含量范围为0.032~0.204mg/kg,均值为0.059mg/kg;砷含量范围为4.63~12.7mg/kg,均值为8.65mg/kg。三峡库区淹没区土壤主要受镉铜污染和铅镉污染。  相似文献   

12.
Seasonal changes in micromineral and macromineral concentrations in tissues of shrimp (Parapenaus longirostris) from Marmara Sea were measured for a 1-year period by using inductively coupled plasma mass spectrometer. The contents of investigated minerals in shrimp were found to be in the range of 0.374–0.716 mg/kg for Hg, 0.526–1.286 mg/kg for Se, 0.007–0.098 mg/kg for Cd, 0.197–0.230 mg/kg for Pb, 5.194–7.600 mg/kg for Cu, 11.090–17.707 mg/kg for Zn, 22.128–38.850 mg/kg for Al, 61.769–88.437 mg/kg for Fe, 0.262–0.368 mg/kg for As, 0.081–0.249 mg/kg for Co, 0.850–1.459 mg/kg for Mn, 0.316–0.507 mg/kg for Ni, 0.032–0.107 mg/kg for Sn, 1.262–1.502 mg/kg for Cr, 2,813.770–3,317.819 mg/kg for Na, 3,702.230–4,479.648 mg/kg for K, 495.782–650.280 mg/kg for Mg, 790.407–1,016.112 mg/kg for Ca, 2,685.873–3,657.658 mg/kg for P, and 0.454–0.942 mg/kg for I. The levels of Hg found in autumn were higher than maximum levels proposed by the European legislation.  相似文献   

13.
The rate of heavy metal pollution in some minor fruit samples growing at roadsides in Turkey were determined by inductively coupled plasma-atomic emission spectrometry (ICP-AES). The mineral contents of samples were found to be different depending on the several parts Citrus fruits. The highest minor and heavy metal levels for Citrus fruits were determined between 17.24 and 45.30 mg/kg boron, 2.08 and 15.05 mg/kg copper, 1.01 and 16.00 mg/kg iron and 2.35 and 9.87 mg/kg zinc. Boron content ranged from 16.54 mg/kg (Deveci pear inner pulp) to 89.89 mg/kg (Arjantin apple outer skin). The level of Fe ranged from 1.49 mg/kg (quince pulp) to 25.05 mg/kg (Ankara pear pulp). Cu content of fruits ranged between 2.52 mg/kg (Fuji apple skin) and 25.93 mg/kg quince skin). Zn content was found between 0.46 mg/kg (Golden apple pulp) and 14.34 mg/kg (quince skin). P contents ranged from 651 mg/kg (Golden apple pulp) to 1269 mg/kg (quince skin). Na was found between 500 mg/kg (Fuji apple skin) and 907 mg/kg (Arjantin apple skin).  相似文献   

14.
The concentrations of heavy metals in tench, pike-perch, and common carp fish caught in four different seasons from Damsa dam lake (Nev?ehir) were determined. Heavy metal contents of fishes changed depending on seasons. The highest Al (20.894 mg/kg) in tench was established in winter, and the lowest Al (1.605 mg/kg) was determined in summer. Fe content of tench fish changed between 112.906 mg/kg (autumn) and 31.207 mg/kg (spring). In addition, Zn contents of tench were found between 36.0323 mg/kg (summer) and 430.586 mg/kg (winter). The results indicate that concentrations of Cu of tench varied from 0.1934 mg/kg (winter) to 15.422 mg/kg (autumn). Results indicate that concentrations varied from 2.923 mg/kg (autumn) to 32.078 mg/kg (summer) with a mean of 11.1893 mg/kg for Al; 0.2483 mg/kg (spring) to 3.3088 mg/kg (autumn) with a mean of 1.6189 mg/kg for Ni; 0.5325 mg/kg (spring) to 0.845 mg/kg (autumn) with a mean of 0.7234 for Pb; and 7.0464 mg/kg (winter) to 253.686 mg/kg (summer) with a mean of 133.6348 for Zn. In common carp, Al, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Zn, Se, Ga, and Te contents were determined as 3.9623 mg/kg; 0.1293, 0.2336, 0.0526, 0.1543, 4.2406, 0.726, 1.797, 0.6216, 6.8536, 0.1783, 0.7876, and 0.371 mg/kg in autumn, respectively.  相似文献   

15.
武江 (乐昌段)水体底泥重金属污染调查   总被引:1,自引:0,他引:1       下载免费PDF全文
对武江乐昌段由上游矿山废水排泄沟、中游霜降河和下游武江段3段水道底泥中Pb、Zn、Cu进行测定.结果表明,Pb的质量比为2.54×103 mg/kg、1.33×103 mg/kg和30.7 mg/kg,Zn的质量比为1.01×103 mg/kg、2.48×103 mg/kg和156 mg/kg,Cu的质量比为42.9 mg/kg、68.8 mg/kg和69.4 mg/kg.3段支水道底泥污染负荷指数(IPL值)分别是14.0、10.6和1.46,整个区域IPL值为6.19,达到极强度污染程度.Pb、Zn总体污染程度比Cu严重,对武江乐昌段及其下游地区存在潜在生态风险.指出,霜降河和废水排泄沟段底泥不能农用,需特别谨慎地疏浚、转运和处置,而武江段底泥则可农用.  相似文献   

16.
The 64 varieties displayed a large variation for all mineral elements, investigated Fe, Mn and Zn, ranging from 24.2 to 43.1 mg/kg, 27.6 to 64.8 mg/kg and 10.4 to 38.2 mg/kg, respectively. The mean Ca, K, Mg, Na, P and S concentrations in wheat rain varieties amounted to 378, 4,266, 1,183, 317, 3,513 and 1,542 mg/kg, respectively. Ca, K, Mg, Na, P and S contents of wheat varieties changed at the levels between 266 and 531 mg/kg, 3,029 and 5,566 mg/kg, 972 and 1,525 mg/kg, 277 and 368 mg/kg, 2,422 and 4,610 mg/kg and 1,241 to 2,052 mg/kg, respectively. The concentrations of Al, Cu, Fe, Mn and Zn of durum wheat samples were found at high levels. The mean Al, Cr, Mo, Ni, Cu, Fe, Mn and Zn concentrations in durum wheat varieties amounted to 10.93, 0.47, 0.72, 0.72, 5.37, 34.9, 37.28 and 20.88 mg/kg, respectively.  相似文献   

17.
研究了乌鲁木齐市不同功能区表层土壤中水溶性氟(Ws-F)的含量。结果表明:土壤Ws-F平均含量为5.36 mg/kg,变幅为1.55~12.53 mg/kg。其中,工业区(7.13 mg/kg)〉绿化区(5.73 mg/kg)〉商业区(5.71 mg/kg)〉居民区(4.93 mg/kg)〉农业区(3.08 mg/kg)。乌鲁木齐市土壤中Ws-F含量已高于我国地氟病发生区表层土壤Ws-F的平均值(2.50 mg/kg),应引起有关部门的高度重视。  相似文献   

18.
偏振能量色散X射线荧光光谱法测定土壤中金属元素   总被引:4,自引:0,他引:4       下载免费PDF全文
建立了偏振能量色散X射线荧光光谱同时测定土壤中6种金属元素的方法,优化了试验条件。方法线性良好,Cr、Mn、Pb、Cu、As、Se的检出限分别为3.62mg/kg、3.65mg/kg、0.91mg/kg、0.23mg/kg、0.35mg/kg、0.01mg/kg,土壤标准样品的测定结果均符合要求,实际样品测定的RSD为0.5%~10.0%,与原子吸收法、原子荧光法的测定结果相吻合。  相似文献   

19.
通过在西安市三环内6个功能区布设62个采样点,采样分析其表层土壤中邻苯二甲酸酯(PAEs)质量比及其构成特征。结果表明,西安市表层土壤中DMP、DEP、BBP、DnBP、DEHP和DnOP平均值分别为0.188 mg/kg、0.187 mg/kg、0.091 mg/kg、4.174 mg/kg、6.122 mg/kg和0.188 mg/kg,6种PAEs总质量比(∑6PAEs)范围为1.54 mg/kg^153.17 mg/kg,平均值为10.95 mg/kg。6个功能区∑6PAEs从高到低为交通区>工业区>混合区>公园>文教区>住宅区。与其他城市表层土壤中PAEs值比较发现,DMP处于高水平,DEP、DnBP、DEHP和∑6 PAEs处于较高水平,BBP和DnOP处于中等水平。  相似文献   

20.
Macro- and microelement contents of legume seeds were determined by ICP-AES. The potassium K contents of seeds ranged between 7,426 mg/kg (Lupinus albus L.) and 16,558 mg/kg (Phaseolus vulgaris L. ssp. sphaericus Mart). In addition, while P contents of seeds changed from 2,719 mg/kg (L. albus L.) to 5,792 mg/kg (Vigna sinensis (L.) Savi), Ca contents ranged at the levels between 1,309 mg/kg (Cicer arietinum L.) and 2,781 mg/kg (L. albus L.). The microelement contents of samples were found to be different depending on several species. The iron levels of samples were determined at the levels between 90.51 mg/kg (Phaseolus mungo L.) and 152.80 mg/kg (P. vulgaris L. ssp. sphaericus Mart). In addition, Zn contents of seeds were found between 31.32 mg/kg (C. arietinum L.) and 44.75 mg/kg (V. sinensis (L.) Savi).  相似文献   

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