A clean, dry sample is weighed and then evacuated for several hours in a vacuum chamber, flushing with CO2 to remove remaining air if necessary.
将岩心样品洗净烘干并称重，然后把样品放到真空箱中抽空其内的空气（必要时充入CO2驱替掉空气）。
A sample of the blend is pre-dried and weighed. The sample is then digested in chemicals appropriate to the blend.
混合样品预先烘干并称重，溶解于自动控制剂量的化学药剂中。
If the sample is weighed, its bulk density can also be calculated.
如果把样品称重，还可以确定样品的体积密度。
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