Organic and mineral components of some Brazilian beans (Phaseolus vulgaris, L.)

Abstract

In the present work the organic and mineral composition of 14 varietis of beans (Phaseolus vulgaris L.) commonly found in our markets were studied. The average value for misture was 11.6%, protein 21.5%, lipids 1.3%, polysaccharides 45.2%, soluble sugars 4.7% and ash 3.9%. Free amino ácido evere identified and yielded from 610 to 1442 mg/100 g. The mean values for the mineral macronutrients were (in %): phosphate 0.17, potassium 1.88, calcium 0.23, magnesium 0.24 and sulphur 2.23. The average contents of micronutrients were (in ppm): boron 24.3, zinc 47.9, copper 174, molibdenium 0.11, iron 330.8 and manganese 17.6. It was found a great variation in the boron (14.2 - 73.8), molibdenium (002 - 0,32) and iron (167.9 - 598.6 ppm) contents. All other components showed a small variation. It was concluded that common beans can be considered a good source of carbohydrates and minerals (macro and micronutrients), and a fairly good source of protein.