CIFOR–ICRAF publishes over 750 publications every year on agroforestry, forests and climate change, landscape restoration, rights, forest policy and much more – in multiple languages.

CIFOR–ICRAF addresses local challenges and opportunities while providing solutions to global problems for forests, landscapes, people and the planet.

We deliver actionable evidence and solutions to transform how land is used and how food is produced: conserving and restoring ecosystems, responding to the global climate, malnutrition, biodiversity and desertification crises. In short, improving people’s lives.

Assessment of essential micronutrient levels in common beans (Phaseolus vulgaris) in Kenya by total reflection X-ray fluorescence

Export citation

In Kenya, where malnutrition and hidden hunger still pose a significant challenge to growth and development, beans are an essential source of food for most of the population. However, data on micronutrient in beans are limited, and although they are required in very small amounts, they are essential for growth and development of plants as well as human beings. The aim of this study was to determine the concentrations of Mn, Fe, Cu, and Zn, in common beans in Kenya. Samples of both fresh bean leaves and dry grains of the most common bean varieties were collected from small-scale farmers in Muguga and Kyevaluki in Kiambu and Machakos Counties, respectively. They were analyzed using total reflection x-ray fluorescence (TXRF), a technique of increasing interest for food analysis since it is fast, easy, and reliable. Standard methods of sample preparation were used, and average elemental concentrations were compared with established sufficiency ranges. Bean leaves and dry bean grains from both sampling areas had sufficient concentrations of the four analyzed elements. Except for the Fe concentrations, the concentrations of the others elements were in the lower end of the sufficiency range for all bean species. The results obtained from this study are essential information for both farmers and policy makers and can be incorporated in programs to guide policy aimed at improving the nutritional quality of beans and thus food security in Kenya.

Altmetric score:
Dimensions Citation Count:

Related publications