The determination of totalrareearth content of rareearth-magnesium alloy were studied. It was used oxalate to be sediment to determine of totalrareearth content with gravimetric method.
主要研究稀土镁合金中稀土总量的测定。选择草酸作沉淀剂,重量法测定稀土总量。
2
As the first batch of rareearth export quotas was released at the end of 2010, by how much will this year's totalrareearth export under the quotas be reduced compared with that in last year?
A total solar eclipse has been making its way of crossing the South Pacific with a rare alignment of the sun, moon and earth, plunging a narrow corridor into darkness.