方法：采用HPLC测定注射液的含量及有关物质，考察制剂对强光、热的稳定性及有效期。

METHODS An HPLC method was used for the determination of content and related substances of diltiazen hydrochloride. The stability under heat and light was investigated.

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经过冷态调试、热态实验和长期运行，验证了该系统的稳定性和可靠性。

Stability and reliability of the system have been proved by cold adjustment, warm experiment and persistent operation test.

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特别是在最大功率下，热漏对系统的稳定性没有影响。

Especially, the stability of system working in the maximum power output is independent of the heat leak.

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