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聚乙烯醇树脂氢氧化钠含量测定方法
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异氰酸酯中酸度的测定
Isocyanates--Determination of acidity
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多亚甲基多苯基异氰酸酯中异氰酸根含量测定方法
Polymethylene polyphenyl isocyanate--Determination of isocyanato content
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多亚甲基多苯基异氰酸酯粘度测定方法
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异氰酸酯中水解氯含量测定方法
Isocyanates--Determination of hydrolyzable chlorine content
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