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71 REE data of 30 granitic rock species in southern China were collected. According tothe equilibrium partial melting model, the mineralogical and chemical compositions of theresidual phases as well as the melting degrees were calculated, which led to the determina-tion of the source materials of these granitic rock. The result shows that there are two typesof petrogenetic rocks among them, i.e. crustal granite and mixed granite. And the mixedratios were obtained for the latter case. A brief discussion on the factors affecting the REE patterns is also made. 相似文献
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实验考察了6种合成的杯芳烃化合物涂层的厚度剪切模式(TSM)声波传感器对30多种有机蒸气的频移响应情况,发现37,38,39,40,41,42-六(乙氧基羰基甲氧基)杯[6]芳烃对苯甲醚分子具有灵敏的主-客识别功能。当涂载量为43μg时,传感器的线性响应范围可达0.016~25.406mg/L,灵敏度为43.8Hz/(mg·L-1)(30℃±0.5℃),检测下限可达0.007mg/L。传感器具有重现性和稳定性好、响应较快的优点,羧酸和含苯环类化合物对传感器有一定干扰,而湿度不干扰。将该传感器用于苯甲醚样品的测定,测量精度与气相色谱法相当,回收率为97.52%~104.37%。 相似文献
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杯[4]芳烃涂层的TSM声波吡啶传感器的研究 总被引:3,自引:0,他引:3
吡啶是一种大气有毒污染物,可引起中枢神经系统抑郁症,刺激皮肤和呼吸系统,损害肝、肾,使胃肠功能失调等,工作场所允许最大浓度为15mg/m3[1].目前吡啶测定方法常有pH滴定法、比色法、气相色谱法、紫外光谱法、流动注射分析法、库仑滴定法和微分阳极溶出... 相似文献
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