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[求助] 硅烷化存在污染问题吗

1.我们实验室用的岛津2010,用BSTFA硅烷化,是在15ml的玻璃管中,80度半个小时。问题是我们的玻璃管是重复利用的,用清水洗干净超声之后烘干再用。这样处理后的试管会对下次的结果有影响吗?
2.我们一种物质会测出好几种参数,比如甲羟戊酸内酯-1和甲羟戊酸内酯-2,出来的峰也不一样,这怎么理解啊,-1和-2代表啥
3.峰图上的m/z怎么这么大啊,比分子量答好多,是带有硅烷吗?
请大神帮忙
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