Benzene, a chemical compound refined from crude oil, was found to cause leukemia in 1928 by two Italian doctors who detected the cancer in a worker exposed to benzene for five years.
2
所有的尿样都能检测到至少一种邻苯二甲酸盐，多数有几种。
All urine samples had detectable levels of at least one phthalate, and most had levels of several more.
3
本方法对检测过氧化苯甲酰具有应用价值。
This method is applicable for the detection of BPO.
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