The above four RMs have been examined by an expert group called by the Research Center for CRMs in 1994 and were accepted as CRMs(GBW O7267,GBW 07268,GBW 07269 and GBW 07270 respectively)by the State Bureau of Technical Supervision in April l995.
英
美
- 該批標準物質(zhì)于1994年12月通過(guò)了國家標準物質(zhì)研究中心組織的專(zhuān)家復審,并于1995年4月被國家技術(shù)監督局批準為國家一級標準物質(zhì),標準號分別為GBW07267(GSM-1)、GBW07268(GSM-2)、GBW07269(GSM-3)、GBW07270(GSM-4)。