Weinand loaded the printer with tricalcium phosphate and a type of polylactic acid - natural structural materials found in the human body. 威南德在打印机里放上了人体中含有的磷酸三钙和聚乳酸这两种自然材料。
A new micro column preconcentration system with actived alumina being used as sorbent was developed for spectrophotometric determination of trace phosphate in natural water. 提出了以活性氧化铝微柱预富集分光光度法测定天然水体中的磷酸根。
