The 20 kinds of preparations were detected by established analysis technology, and compared with the corresponding standard substances ambroxol was not obtained with the 20 kinds of samples.
对20种制剂用建立的分析技术进行了检测，经与相应的标准物质比较，得到20种样品均未含氨溴索。
In the analysis of grey ssytem, generalized H point standard addition method can be used to reduce the interference of unknown substances and to determine the analyte.
通用H点标准加入法可消除未知干扰影响 ，测定灰色体系中待测组分含量 ，给出唯一解。
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