溶剂热法制备的二氧化钛纳米颗粒用不用煅烧?看文献照做的,原文部分是这样的It was kept under vigorous stirring for one hour and the whole mixture was transferred in a 120 ml Teflonlined stainless steel autoclave maintained at 150 ?C for 18 h and finally cooled to room temperature naturally. This produced a yellowish white colored product which was centrifuged with DI waterand absolute ethanol for several times. Then the sample was dried at 80 ?C for 3 h. Finally, the powder was collected and grinded in a mortar and pestle for 1 min to obtain fine powder which was used for further investigation帮我看看应该是不用再高温煅烧了吧?查看更多10个回答 . 18人已关注
如何由质荷比得知分子结构?The peak at m/z 538.27 corresponds to lysosulfatide molecular speciescomposed of d18:2, the peak at m/z 540.30 corresponds to lysosulfatidemolecular species composed of d18:1, the peak at m/z 542.32 correspondsto lysosulfatide molecular species composed of d18:0 in addition to thesecond isotopic peak of lysosulfatide composed of d18:1, the peak at m/z558.32 corresponds to lysosulfatide molecular species composed of t18:0,the peak at m/z 568.34 corresponds to lysosulfatide molecular speciescomposed of d20:1, the peak at m/z 570.30 corresponds to lysosulfatidemolecular species composed of d20:0, and the peak at m/z 586.32 correspondsto lysosulfatide molecular species composed of t20:0.请问是如何根据m/z得知分子结构的,比如由m/z 538.27得知为 d18:2。查看更多3个回答 . 2人已关注