first derivative spectrophotometry was used
first derivative spectrophotometry was used
采用一阶导数分光光度法
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Methods First derivative spectrophotometry was used.
方法一阶导数分光光度法。
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Method: First derivative spectrophotometry was used.
方法：用一阶导数光谱法测定。
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METHODS: The first order derivative spectrophotometry was used.
方法：采用一阶导数分光光度法。
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