由于这种污染元素的作用在试样露出水面时依然存在，致使潮差暴露也出现类似情况。
For the pollution ions were existed on the specimens when they emerged from seawater, the dealloying corrosion of double phase brass exposed to mean tide zone was also accelerated.
在环境分析中，SFE能够减少试样用量、缩短试样处理时间，且无二次污染。
Applying SFE in the analysis of environment can make reduction of sample dosage, shortening the sample treatment period and no second pollution.
方法快捷、简便易行，无污染，准确度和精密度均能满足试样分析要求。
The results showed that this method is simple, convenient and pollution-free. The accurate and precision can satisfy the needs of analysis.
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