analytical condition were as follows, column : 10 % modified polyethylene glycol 20m on acid washed 201, 2m column with 3 mm i . d ., fid as detector, phe-nylmethyl ketone as internal standard compound 以10%改性聚乙二醇20m为固定液,苯乙酮为内标物,氢火焰离子化检测器,内标法定量分析异辛酸。
the electrode character of tourmaline particles influences the redox potential of water and regulates the ph value of solution to the weak alkali . the element sites on the surface of tourmaline powder play a bigger effect on acid solution than alkali solution 由于电气石表面的电场作用,电气石的电极性能够影响水体的氧化还原电位,可维持水体为弱碱性,并分析了电气石粉体表面位的影响。
a kind of stainless steel flux-cored wire has been successfully developed, based on acid slag type system, by adding a bit of oxides and trace of deoxidizer, adjusting the fluidity of melting slag to increase shielding of the back weld 在酸性渣系的基础上,通过添加少量氧化物,调整熔渣的流动性,并加入微量的强脱氧剂,以增强背面焊缝的保护,研制成功一种背面不充氩的不锈钢打底单面焊双面成形专用药芯焊丝。
a both governments have commenced joint topical studies on acid rain, nitrogen dioxide, photochemical smog and particulates to identify the sources of problem that affect air quality in the pearl river delta region and to recommend effective mitigation measures 一粤港双方已联合展开有关酸雨二氧化氮光化烟雾和粒子污染及其防治的专题研究,以找出影响珠江三角洲地区空气质素问题的根源,并建议有效的防治措施。
both governments have commenced joint topical studies on acid rain, nitrogen dioxide, photochemical smog and particulates to identify the sources of problem that affect air quality in the pearl river delta region and to recommend effective mitigation measures (一)粤港双方已联合展开有关酸雨、二氧化氮、光化烟雾和粒子污染及其防治的专题研究,以找出影响珠江三角洲地区空气质素问题的根源,并建议有效的防治措施。