共查询到10条相似文献,搜索用时 44 毫秒
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目的 探讨用4-氨基安替比林流动注射分析测定鱼中挥发性酚.方法 对4-氨基安替比林流动注射分析的线性范围、最低检出限量、加标回收率及相对标准偏差进行测定,在操作质量合格的前提下,检测广东省深圳市52份海鱼及42份淡水鱼.结果 4-氨基安替比林流动注射分析线性范围为0.001~0.04 mg/kg,最低检出限<0.001mg/kg,加标回收率89.5%~102.9%,相对标准偏差1.3%~4.6%;海鱼酚平均质量浓度(0.184 mg/kg)明显高于淡水鱼(0.061 mg/kg)(P<0.05);2009年淡水鱼酚比2007年(0.049 mg/kg,萃取法)高24%,但差异无统计学意义.结论 4-氨基安替比林流动注射分析的高自动化、微量操作,提高了方法的灵敏度和稳定性,符合高效、节能要求. 相似文献
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Amr HM El-Tawila MM Ramadan MH 《The Journal of the Egyptian Public Health Association》2005,80(1-2):51-76
Lake Mariut has suffered over the years from the untreated sewage, agricultural and industrial wastes dumped into it. Lake Mariut fish quality and quantity were adversely affected eventually being unfit for human consumption due to its poor water quality. The present study was carried out to evaluate the levels of metals in the fish caught from Lake Mariut main basin and its fitness for human consumption, and the water quality after the enforcement of the Egyptian Law for Environmental Protection (Law 4/1994). Fish and water samples were collected form Lake Mariut main basin through out the period from May to December 2000. The results showed that mercury was totally undetected in fish and water samples. The levels of Fe obtained were very low compared to previous studies. Fe and Cr contents in fish flesh were higher compared to their levels in water samples. Also Cu has shown a decrease in both fish and water samples. Zn and Cd contents in water samples have decreased compared with former studies. However, they have not changed in fish flesh. Pb content in both fish flesh and water samples has shown a great decrease compared to previous studies. The Cd and Pb mean values in fish flesh of the present study (0.81 and 0.14 mg/kg) exceeded the Egyptian Standards No. 2360/1993 value (should not exceed 0.1 mg/kg for each). The results also showed that the water quality has changed compared with previous studies. BOD has increased in north of Main Basin, east of Main Basin, South of Main Basin, and southwest of Main Basin; and deCreased in WTP effluent; and Qalaa Drain. There has been an increase in TSS, TVSS, and NO3 levels compared to pervious studies. There has been a decrease in TS, TDS, COD,hardness, and chloride levels. This decrease, especially in COD, may be attributed to the enforcement of the Egyptian Law 4/1994. The pH and alkalinity were in agreement with the values shown by previous studies except for east of Main Basin which showed higher values. The study included some recommendations aiming at improving both water quality and fish of the Main Basin. 相似文献
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深圳市市售纯净水微生物污染情况分析 总被引:8,自引:0,他引:8
饮水与健康的关系十分密切 ,饮用水的卫生质量一直受到国内外学者和广大人民群众关注。近年来市场上出现了大量的纯净水、太空水、去离子水等 ,但由于纯净水不允许添加任何防腐剂和抑菌剂 ,受污染的纯净水中的微生物会迅速繁殖 ,不仅危害消费者的身体健康 ,还使企业蒙受重大的经济损失。现对深圳市福田区 2 0 0 1~ 2 0 0 2年市售纯净水进行微生物指标检测。1 材料和方法1 .1 样品来源2 0 0 1~ 2 0 0 2年对本市市售的 32个品牌 (本市 2 0个 ,外埠1 2个 )的纯净水进行抽检 ,部分由生产经销商送检。共抽水样 4 86份 ,其中本市水样 31 5份 ,… 相似文献
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目的 探讨深圳市空气PM2.5对于心脑血管疾病死亡的短期影响。方法 收集深圳市居民心脑血管疾病死亡资料及同期大气污染物浓度、气象资料,采用半参数广义相加模型,控制气象因素、长期趋势、短期趋势等因素的基础上,分析深圳市2014年空气污染物与心脑血管疾病死亡之间的关系。结果 空气PM2.5滞后7 d、PM10滞后5 d和SO2滞后5 d分别对心脑血管疾病死亡的影响最强,日均浓度每上升10 μg/m3,可分别导致深圳市居民心脑血管疾病死亡风险增加0.27%(95% CI:0.06~0.48),0.18%(95% CI:0.04~0.32)和1.00%(95% CI:0.19~1.81)。当两种或两种以上污染物引入模型后,污染物对心脑血管疾病死亡的影响差异均无统计学意义(均有P>0.05)。结论 深圳市空气PM2.5、PM10和SO2对居民心脑血管疾病存在急性影响,会增加死亡风险。 相似文献
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