夏天到了，不少人会用蚊香、电热蚊香液驱蚊。可您知道吗？这些驱蚊产品安不安全，其实是有国家标准严格把关的！GB/T 13917.4-2009、GB/T 13917.5-2009、GB/T 13917.6

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随着我国对环境空气污染物监测要求的不断提高，多氯联苯PCBs）作为持久性有机污染物POPs）的重要成员，其准确测定对环境保护和公共健康至关重要。为满足HJ 902-2017《环境空气 多氯联苯的测定

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