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.: Home > Nature and Science > 2010 > Volume 8 Number 5 > Molla Rahman Shaibur1, Abul Hasnat Md. Shamim2, 3, SM Imamul Huq4 and Shigenao Kawai

Comparison of digesting capacity of nitric acid and nitric acid-perchloric acid mixture and the effect of lanthanum chloride on potassium measurement

Molla Rahman Shaibur1, Abul Hasnat Md. Shamim2, 3, SM Imamul Huq4 and Shigenao Kawai
1Department of Environmental Science & Health Management, Jessore Science & Technology University, Bangladesh 2School of Agriculture & Rural Development, Bangladesh Open University, Gazipur-1705, Bangladesh 3Graduate School of Environmental Science, Okayama University, 1-1, Tsushima-Naka, 3-Chome, Okayama700-8530, Japan 4Department of Soil, Water & Environment, University of Dhaka, Dhaka-1000, Bangladesh 5The United Graduate School of Agricultural Sciences, Iwate University, Morioka 020-8550, Japan
Abstract :

Abstract: Nitric acid-perchloric acid mixture is the renowned digesting reagent in the scientific world of plant nutrition. Beside this, some other inorganic acids can be used as the digester of plant samples. Therefore, this experiment was conducted to find out if there is any difference between the digesting capacity of nitric acid (HNO3) and nitric acid-perchloric acid mixture (HNO3-HClO4) or not. The hydroponic experiments were conducted with barley (Hordeum vulgare L. cv. Minorimugi) and rice (Oryza sativa L. cv. Akihikari) seedlings. At suitable stage, the plant samples were collected, washed with deionized water, separated into shoot and root, dried, grinded and then divided into two groups for shoot and root individually for two types of seedlings. One group was for only HNO3 acid and the other group was for HNO3-HClO4 acid mixture. Phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), manganese (Mn), zinc (Zn) and copper (Cu) were measured after digesting the samples. There was no significant difference between the digesting capacity of HNO3 acid and HNO3-HClO4 acid mixture. Potassium was measured by diluting the samples (200-600 times) containing lanthanum chloride (LaCl3) or without LaCl3. Lanthanum chloride did not have any significant effect on K measurement in this dilution system. [Nature and Science 2010;8(5):157-162]. (ISSN: 1545-0740).

Keywords :
Concentration, Lanthanum chloride, Nitric acid and nitric acid-perchloric acid mixture

Date Deposited : 12 Jan 2011 17:03

Last Modified : 12 Jan 2011 17:03

Official URL: http://www.sciencepub.net/nature/ns0805/

Volume 8, Number 5, May 2010 , ISSN 1545-0740

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