组织胺、总挥发性氮和酸价是鱼粉鲜度的重要参数，可做为鱼粉质量的综合评价指标。

Histamine, volatile basic nitrogen (VBN) and total acid values are recommended to be used in the integrated assessment of fish meal quality as they are important parameters of its freshness.

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本文研究了强碱性条件下，以乙二胺为络合剂，用水合肼把二价镍离子还原为单质镍的方法。

Under the condition that the strong basic is medium and ethylene diamine is complex reagent, the method that Ni2 + of wastewater is deoxidized by hydrazine hydrate is studied.

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