Laboratory tests were done to determine the reducing effect of ascorbic acid, citric acid and camu camu (Myrciana dubia). Tests with ascorbic acid and citric acid were made using 2, 3.5 and 7 equivalents of acid to 100 rpm and initial pH of 10. The content of ascorbic and citric acid was determined at 2 and 1.9 grams, respectively, per 100 grams of fresh fruit camu camu. The results indicate that ascorbic acid reduces chromium (Vi) up to 98% in 90 seconds. Citric acid shows no activity.

Seeds of chirimoya and guanabana from the communities of Cumbe and Callahuanca - Yauyos, Lima were analyzed. The extraction of natural toxic was realized using ethanol as the optimal solvent, after several solvent tests, phytochemicals analysis identified :saponins, coumarins, tannins, quinones and essential oils, mostly castor oil which was confirmed by FTIR spectra. Qualitative analysis results identified: PO4(3-), AsO4(3-) and others. Toxicological tests extracts applied on larvae and fruit flies finding levels of mortality as 88% to 94% on chirimoyas and guanabanas respectively.

Laboratory tests were done to determine the reducing effect of ascorbic acid, citric acid and camu camu (Myrciana dubia). Tests with ascorbic acid and citric acid were made using 2, 3.5 and 7 equivalents of acid to 100 rpm and initial pH of 10. The content of ascorbic and citric acid was determined at 2 and 1.9 grams, respectively, per 100 grams of fresh fruit camu camu. The results indicate that ascorbic acid reduces chromium (Vi) up to 98% in 90 seconds. Citric acid shows no activity.

Seeds of chirimoya and guanabana from the communities of Cumbe and Callahuanca - Yauyos, Lima were analyzed. The extraction of natural toxic was realized using ethanol as the optimal solvent, after several solvent tests, phytochemicals analysis identified :saponins, coumarins, tannins, quinones and essential oils, mostly castor oil which was confirmed by FTIR spectra. Qualitative analysis results identified: PO4(3-), AsO4(3-) and others. Toxicological tests extracts applied on larvae and fruit flies finding levels of mortality as 88% to 94% on chirimoyas and guanabanas respectively.

Aqueous extractions were performed controlling the pH with CaCO3 and Ca(OH)2, using as clarifiers activated coal and activated clays in cold and warm solutions to obtain best results with cold bentonite, warm activated clay and warm activated coal. Analytical results were compared with a commercial sample of stevia.

Aqueous extractions were performed controlling the pH with CaCO3 and Ca(OH)2, using as clarifiers activated coal and activated clays in cold and warm solutions to obtain best results with cold bentonite, warm activated clay and warm activated coal. Analytical results were compared with a commercial sample of stevia.