BS ISO 11023:1999(2001) Liquorice extracts (Glycyrrhiza glabra L.) — Determination of glycyrrhizic acid content — Method using high - performance liquid chromatography
2001BS ISO 11023:2001 Liquorice extracts (Glycyrrhiza glabra L.) - Determination of glycyrrhizic acid content - Methods using high-performance liquid chromatography
2001BS ISO 11023:1999 Liquorice extracts (Glycyrrhiza glabra L.). Determination of glycyrrhizic acid content. Methods using high-performance liquid chromatography