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（2025-08-17 15:50）

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在化学分析与材料研究的广阔天地里，标准物质如同标尺，衡量着每一次实验的精准与可靠。特别是在聚合物科学、材料表征及环境监测等领域，甲醇中苯乙烯溶液标准物质以其独特的价值，成为众多实验室不可或缺的&ldq

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昨日纯碱主力合约2305震荡下行，收于2808元/吨，下跌51元/吨，跌幅1.78%。据昨日隆众资讯数据，本周纯碱产量 60.20 万吨，环比减少3.42%，纯碱库存 27.95 万吨，环比+2

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