另取橙皮对照品,加甲醇制成每1ml含0.5mg的溶液,作为对照品溶液。另取甘草酸铵对照品,加甲醇制成每1ml含0.5mg的溶液,作为对照品溶液。再取黄芪甲苷对照品,加甲醇制成每1ml含0.5mg的溶液,作为对照品溶液。
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