Rapid analysis of magnesium, potassium and calcium contents in feedstuffs, 1: The use of hydrochloric acid extraction procedure for mineral analysis in feedstuffs
2007
Nishiguchi, Y.(National Agricultural Research Center for Western Region, Fukuyama, Hiroshima (Japan)) | Ando, S. | Hayasaka, K. | Ikeda, J. | Hori, K. | Suga, Y. | Fukunaga, A.
In order to investigate an application of hydrochloric acid extraction procedure as an alternative procedure of dry-ashing, the concentration of magnesium (Mg), potassium (K) and calcium (Ca) in selected feedstuffs were compared. One gram of 1-mm ground samples (Italian ryegrass hay, corn silage, alfalfa hay, soybean meal, and corn flake) were added to 50ml of l% (w/w )HCl, and shaken (125 strokes/min) at 20 or 50 deg C for 15 to 30 minutes using shaking machine. Mg and Ca contents were determined by atomic absorption spectrophotometry and K was determined by flame spectrophotometry. These measured values were compared with those obtained through dry-ashing method. Each element was extracted at 20 deg C for 30 minutes. The Mg, K and Ca percentages in 72 feedstuff samples showed the same value between extraction and ashing procedures.
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