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Standard preparation:Weigh accurately about 70 mg standard in 50 ml of volumetric flask,dissolve and make up to the mark with mobile pase. 标准溶液制备：准确称取约70毫克标准品到50毫升容量瓶里，用流动相溶解到刻度。
When you use this ERM, please carefully break open the ampoule at the neck and pipette 10ml from the ampoule into 250 ml volumetric flask and bring to volume by purified water. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10毫升于250毫升容量瓶中，用纯水定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipette 10 ml from the ampoule into 250 ml volumetric flask and bring to volume by 1% HCl solution. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10毫升于250毫升容量瓶中，用1%25盐酸定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipet 10 ml from the ampule into 250 ml volumetric flask and bring to volume by 1% HCl solution. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10毫升于250毫升容量瓶中，用1%25盐酸定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipette 10 ml from the ampoule into 250 ml volumetric flask and bring to volume by 1% HNO3 solution. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10毫升于250毫升容量瓶中，用1%25硝酸定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipet 10 ml from the ampule into 250 ml volumetric flask and bring to volume by 1% HNO3 solution. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10毫升于250毫升容量瓶中，用1%25硝酸定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipette 10 ml from the ampule into 250 ml volumetric flask and bring to volume by 1% HNO3 solution. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10毫升于250毫升容量瓶中，用1%25硝酸定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipette10 ml from the ampoule into 250 ml volumetric flask and bring to volume by 1% HNO3 solution. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10 毫升于250 毫升容量瓶中，用1%25硝酸定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipette 5ml from the ampoule into 100ml volumetric flask and bring to volume by pre-distilled carbon tetrachloride. 临用时割开安瓿，用5毫升干燥洁净移液管从安瓿中准确移取浓样5毫升于100毫升容量瓶中，用经重蒸馏等纯化处理过的四氯化碳稀释定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipette 10 ml from the ampoule into 250 ml volumetric flask and bring to volume by 0.1% NaOH solution. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10毫升于250毫升容量瓶中，用0.;1%25氢氧化钠定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipet 10 ml from the ampule into 250 ml volumetric flask and bring to volume by laboratory-pure water. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10毫升于250毫升容量瓶中，用纯水定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipette 15 ml from the ampoule into 250 ml volumetric flask and bring to volume by formaldehyde solution. 临用时割开安瓿，用15毫升干燥洁净移液管从安瓿中准确移取浓样15毫升于250毫升容量瓶中，用甲醛吸收液定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipet 15 ml from the ampule into 250 ml volumetric flask and bring to volume by laboratory-pure water. 临用时割开安瓿，用15毫升干燥洁净移液管从安瓿中准确移取浓样15毫升于250毫升容量瓶中，用纯水定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipet 10 ml from the ampule into 250 ml volumetric flask and bring to volume by 1%HNO3 or 1%HCl solution. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10毫升于250毫升容量瓶中，用1%25硝酸或1%25盐酸溶液定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipette 10 ml from the ampoule into 250 ml volumetric flask and bring to volume by 1% HNO3 or 1% HCl solution. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10毫升于250毫升容量瓶中，用1%25硝酸或1%25盐酸定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipet 10 ml from the ampule into 250 ml volumetric flask and bring to volume by 1% HNO3 or 1% HCl solution. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10毫升于250毫升容量瓶中，用1%25硝酸或1%25盐酸定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipet 10 ml from the ampule into 100 ml volumetric flask and bring to volume by fresh distilled water. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10毫升于100毫升容量瓶中，用新鲜蒸馏水定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipette 10 ml from the ampoule into 250ml volumetric flask and bring to volume by laboratory-pure water. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10毫升于250毫升容量瓶中，用纯水定容。
When you use this ERM, please carefully break open the ampoule at the neck and pipette 10 ml from the ampoule into 250 ml volumetric flask and bring to volume by 1% HNO3 or 1% HCl. 临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10毫升于250毫升容量瓶中，用1%25硝酸或1%25盐酸定容。
volumetric flask with one mark and stopper 带塞单标记量瓶