????1.???÷?Χ

????????????????Bi58Sn??Sn96.5Ag??Sn95Sb???????????(С??0.1%)??

????2.???

???????????????????????????????????????????????????????????-???????????? ?????????е????

????3.???

????3.1.????A (????85+ ????10+?5)

????3.2.????B (????1+????3+?8)

????3.3.?????? (???????99.90%)

????3.4.?????? (???????99.90%)

????3.5 ?????? (???????99.99%)

????3.6.?????? (???????99.90%)

????3.7.???????(100??g/mL) ???0.100g?(???????99.99%)??5.mL????(1+1)???????? ???????100mL??????С?? ?????????(1+10)?????10??????????? ???

4 ????????

 

????4.1 ????

????????????1.0g??

????????????????????????????????????????

????4.2 ???????

???????????????????У?????50mL????A???????????????10~20mL????????????????100mL??????С?????1h?????????????????

???????????????????????????B???

??????????????????????????????????????????

????4.3 ??

?????????????????????????-??????棬????????????????283.3nm??????????? ???????????С?

????????????????????????棬??????????????????????????????-???????????? ?檔

????4.4 ???????????

???????1.0g?????????? ??????????????????????????(0-20mL?????0-2000??g)?????°????? ????????????????????????????????????С???????????????????????????????????

?????? ??????????????????????
?????? ??????????·??????