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在化学分析与环境监测的广阔领域里，精准的pH值测量是基础中的基础。多年的实验室工作经验告诉我，一个微小的pH偏差，都可能对实验结果产生重大影响。而氢氧化钙pH溶液标准物质，正是那把确保我们测量准确无误
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近日，国家卫生健康委员会与国家市场监督管理总局联合发布《GB 5009.305-2025 食品安全国家标准 食品中双酚A、双酚F和双酚S的测定》，该标准将于2025年9月16日正式实施。作为我国首个针
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