国家标准物质-标准物质实验室【北京华研】
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USGS40 L-glutamic acidL-glutamic acid L-glutamic acid 2g
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USGS39 potassium perchloratepotassium perchlorate potassium perchlorate 1g
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USGS38 potassium perchloratepotassium perchlorate potassium perchlorate 1g
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USGS37 potassium perchloratepotassium perchlorate potassium perchlorate 1g
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USGS35 sodium nitratesodium nitrate sodium nitrate 0.3g
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USGS34 potassium nitratepotassium nitrate potassium nitrate 0.3g
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USGS32 potassium nitratepotassium nitrate potassium nitrate 0.3g
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USGS26 ammonium sulfateammonium sulfate ammonium sulfate >0.8g
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USGS25 ammonium sulfateammonium sulfate ammonium sulfate >0.6g
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USGS24 graphitegraphite graphite 0.8g
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