Objective To establish the method for determining controlled contents of As, Pb and Hg in Chinese medicinal materials.
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2. 色斑：遗传性雀斑、黄褐斑、晒斑、铅汞斑、老年斑、色素沉着等。
Fleck: Transmissibility aestates, chloasma, sunburn, lead mercury speckle, senile plaque, chromatosis etc.
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3. 镉铅汞齐饱和标准电池具有很高的稳定性和较低的电动势温度系数。
It has been proved that the saturated cadmium sulphate standard cells with cadmium-lead amalgam cathode have a high emf stability and low emf temperature coefficient.
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4. 同时也有研究发现鲨鱼翅含有铅汞等有毒元素，而营养价值却不及鸡肉和猪肉。
Research has also found that shark fin contains poisonous elements, including lead and mercury, but the nutritious value is less than that of chicken or pork.
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5. 同时也有研究发现鲨鱼翅含有铅汞等有毒元素，而营养价值却不及鸡肉和猪肉。
Research has also found that shark fin contains poisonous elements, including lead and mercury, but the nutritious value is less than that of chicken or pork.
