purity grade

DHS-B Utma-high purity , 10 W alkali, low aluminum, low boron, semiconductor grade.

高纯度, 低碱, 低铝, 低硼, 半导体级.

The technology and parameters of producing feed grade zinc oxide from chemical industry by-product sodium hydrosulfite were studied. The effective ways to reduce contents of Pb, Cd and to increase purity of feed grade zine oxide were discussed.

对利用化学工业保险粉副产品生产饲料级氧化锌的工艺以及参数进行了研究，探讨了降低重金属Pb、Cd含量，提高饲料级氧化锌纯度的有效途径。

The Production of Copper Oxide and High Purity Ferric Oxide from Low-grade Copper Ores

利用低品位铜矿生产氧化铜和高纯三氧化二铁

Electronic grade chemica Technical requirements of commercial purity beryllium oxide powder

电子工业纯度级化学试剂GB/T3135-1982工业纯氧化铍粉末技术条件

B 4C pellets with different B/ C ratio and nuclear purity grade sodium were put into a stainless steel cladding tubes and the out of pile tests were carried out at 550,650 and 750 ℃.

在堆用不锈钢包壳管内分别填装不同B/C比的B4C芯块及核级钠，以模拟快堆控制棒内的B4C/Na/S.S。

A new technique for preparation of high-purity magnesia from low-grade magnesite was studied.

研究一种以 低品位 菱镁矿为原料制取高纯镁砂的新方法.