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采用Eu3+-DTPA标记L-929株靶细胞，经时间分辨荧光仪测定，建立一种崭新的时间分辨荧光分析法来测定细胞活性，此法具有灵敏度高，有效期长，不污染环境等优点。
The target cell of L-929 strain was labeled with Eu3 + -DTPA, and a new time-resolved fluorimetric assay was established to determine the cell viability by time-resolved fluorimetry. This method has the advantages of high sensitivity, long effective period and no environmental pollution.