家兎の消化に関する研究 : (第6報)飼料特に野生白クローバーのマンガン含量について
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概要
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(1) The presence of manganese and its content in feeds, especially in the wild white clover, is observed (2) The presence of manganese is found at 2794. 8 Å in the spectrogram of the wild white clover ash taken by the uncontinuous arc method of spectrochemical analysis. Besides this, calcium, iron, silicon, magnesium, aluminium, sodium, potassium and copper are also found in the ash. The contents of iron, aluminium, magnesium and manganese are estimated semi-quantitative-ly. The result shows that they are ca. 1, 0.5, 3.5 and 10-2 in percentage respectively. Their contents, except manganese, almost coincides with the result of chemical analysis of the ash, already reported in Part 4 of this study by one of the authors. (3) The manganese content in the wild white clover hay is determined colorimerically by the GOTO-MUSHAs photoelectric colorimeter and the Duboscq colorimeter. The permanganate colour appears soon after the addition of (NH4)2S2O8 as the oxidising agent, its appearance being catalysed by the silver ion, and is stabilised by the addition of phos-phoric acid. The absence of mainganesei slicate in the ash is found colorimetrically. The result shows that the manganese content after the treatment with hydrofluoric acid is the same as after the untreatment. The wild white clover hay contains from 34 to 43 p.p.m. of manganese, which is also checked from the values determined by the Beckman Spectrophotometer at 526 mμ. In two figures, it is shown that the manganese is precisely determined to the extent of 20γ per cc of the solution by the Beckman Spectrophotometer, though it is scarcely able to be determined over 1γ per cc by the photoelectric colormeter. The manganese content in several kinds of feed are shown in Table 4.
- 社団法人 日本農芸化学会の論文