我国现采用的浸渍法分离前寒武纪疑源类化石这一方法,普遍尚未采取严密的防止污染的措施。因此,从样品的采样、破碎、浸泡过程中所用的水,有关化学试剂,未净化的空气以及制片时载、盖薄片的烘干处理等方面,都存在对样品发生污染的可能性。这对尚未查明其亲缘关系的疑源类化石,以广泛采用纯形态学的分类命名方法;特别是对黑色或 In our country, the dipping method is used to separate prehistoric fossil suspected fossils. In general, no strict pollution prevention measures have been taken. Therefore, there is a possibility of contamination of the sample from sampling, crushing, water used in the dipping process, chemical reagents, unpurified air, drying at the time of filming, and baking of the cover sheet. This has not yet been identified for its related species of fossil fuss to the widespread use of pure morphological classification nomenclature; especially for black or