用NBS标准参考物核对了实验中使用的部份标准，结果满意。
The partial standards used in our experiment are checked with NBS standard reference material and the results are satisfactory.
关键试剂，如：抗体，示踪物，参考标准品和基质应适当定义并在规条件下储存。
Key reagents, such as antibody, tracer, reference standard, and matrix should be characterized appropriately and stored under defined conditions.
提出通过修正标准参考环境而确定安全基准环境的理论，然后用足用参数来评价不同污染物的环境影响。
A theory is proposed that safety reference environment can be got by modifying standard reference environment. The exergy is used to valuate the environmental impact of different pollutants.
此结果为修订作业环境苯及其同系物各自的卫生标准或制定混苯的卫生标准提供了参考依据。
The result provided a reference for amending working environment sanitary criterion of benzene, toluene, and xylene.
然而，在商业上是很少有参考标准的这些化合物。
However, very few reference standards of these compounds were commercially available.
然而，在商业上是很少有参考标准的这些化合物。
However, very few reference standards of these compounds were commercially available.
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