عزل مجموعة من الصبغات الطبيعية من نباتي الكركديه و أوراق اللهانة البنفسجية الليبيين و استخدامها كدلائل حامض-قاعدة و معرفة طبيعة الأوساط الحامضية أو القاعدية للمحاليل

الملخص EN

The important is increasing in the natural pigments extracted from plants in the recent years because it is more safely for use in all areas than synthetic dyes so it has extracted a group of natural pigments from the fruit of hibiscus and leaves red cabbage Libyans plants .

the extracted pigments used as acid – base indicator and compared with some common indicators , phenolphthalein and methyl orange .

the results showed a consistency in the color change .

the extracted pigments also used in preparation of paper chromatography (PC ) similar to the litmus paper.