Follow
International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00 For more details click here
National Academy of Agricultural Sciences (NAAS) : NAAS Score: *5.38 (2019) [Effective from January 1, 2019]For more details click here

Login as a Reviewer

Indexed in



National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

See Guidelines to Authors
Current Issues

Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(4): 3322-3328
DOI: https://doi.org/10.20546/ijcmas.2018.704.376


Characterization of Metal Ion Complexes with Humic Fractions of Farmyard Manure by Potentiometric Titrations
D. Rajashekhar, M. Srilatha, P. Chandrasekhar Rao, S. Harish Kumar Sharma and K.Bhanu Rekha
Department of soil science and Agricultural chemistry, College of Agriculture, PJTSAU, Rajendranagar, Hyderabad - 500 030, Telangana, India
*Corresponding author
Abstract:

The present study was carried out at the laboratory, Department of Soil Science and Agricultural Chemistry, College of Agriculture, Rajendranagar to characterize the complex formation of humic fractions with metal ions. The results observed that increase in pH of humic and fulvic acid when titrated with 0.1 N NaOH indicates higher buffering capacity of these fractions. Potentiometric titration curves obtained for both humic and fulvic acids are sigmoidal in shape indicating their weak acid nature. Absence of inflection indicates the formation of metal complexes. Among all the metal ions does not show any inflection with both humic and fulvic acid indicating metal ion forms more stable complexes with these humic fractions. In case of Zn shows greater stability at pH 8.0 and above. Thus these humic fractions can be used as carrier materials especially supply of micronutrients to in crop nutrition as these also prevents the loss of nutrients from leaching by forming complex with metal ions like cationic micro nutrients.


Keywords: Farmyard manure (FYM), Humic acid (HA), Fulvic acid (FA), Metal ions and Potentiometric titration
Download this article as Download

How to cite this article:

Rajashekhar, D., M. Srilatha, P. Chandrasekhar Rao, S. Harish Kumar Sharma and Bhanu Rekha, K. 2018. Characterization of Metal Ion Complexes with Humic Fractions of Farmyard Manure by Potentiometric Titrations.Int.J.Curr.Microbiol.App.Sci. 7(4): 3322-3328. doi: https://doi.org/10.20546/ijcmas.2018.704.376