著者

服部 考成 福士 惠一 早川 真 湊 太郎

出版者

公益社団法人 日本分析化学会

雑誌

分析化学 (ISSN:05251931)

巻号頁・発行日

vol.62, no.8, pp.737-741, 2013-08-05 (Released:2013-09-04)

参考文献数

12

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We developed a capillary zone electrophoresis method with direct UV detection for the determination of inorganic anions (Cl−, NO2−, and NO3−), organic acids (oxalic acid, citric acid, and malic acid), and amino acids (aspartic acid and glutamic acid) in the common ice plant (Mesembryanthemum crystallinum L.). As the background electrolyte, a 20 mmol L−1 disodium hydrogenphosphate dodecahydrate solution adjusted to pH 10.6 was used with the addition of 0.001% (w/v) hexadimethrine bromide to reverse electroosmotic flow. The detection responses for the above analytes were improved by 3.5 – 580 fold in terms of the limits of detection (LODs, S/N = 3) in comparison with conventional indirect UV detection. The LODs for the analytes were 0.040 – 2.9 mg L−1. The values of the relative standard deviation (RSD, n = 4, intra-day) of the migration time and the peak area were, respectively, 0.081 – 0.43% and 0.28 – 9.3% when extract from the common ice plant was analyzed. Using the proposed procedure, Cl−, NO2−, NO3−, and oxalic acid in the common ice plant were detected within 9 min; citric acid, malic acid, aspartic acid, and glutamic acid were detected within 12 min.

著者

福士 惠一 豊田 純也 高木 俊夫

出版者

公益社団法人 日本化学会

雑誌

化学と教育 (ISSN:03862151)

巻号頁・発行日

vol.53, no.11, pp.633-636, 2005

参考文献数

10

被引用文献数

1

著者

福士 惠一 辻本 淳一 横田 久里子

出版者

公益社団法人 日本分析化学会

雑誌

分析化学 (ISSN:05251931)

巻号頁・発行日

vol.54, no.2, pp.175-178, 2005 (Released:2005-04-08)

参考文献数

8

被引用文献数

6 6

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We have determined the concentrations of inorganic components in jellyfish, such as Aurelia aurita (with and without aeration), Stomolophus nomurai, and dried sludge of Aurelia aurita using absorptiometry, flame photometry, ICP emission spectroscopy, atomic absorption spectrometry, or ion chromatography to examine the potential usefulness of jellyfish as a fertilizer for vegetable fields. The concentrations of the total nitrogen (9800 mg/kg), total phosphorus (19000 mg/kg), magnesium (17000 mg/kg), and calcium (27000 mg/kg) in the dried sludge of Aurelia aurita were 23, 1360, 14, and 96-times higher than those in Aurelia aurita (without aeration, 420, 14, 1200, and 280 mg/kg in fresh weight), respectively. Although the dried sludge of Aurelia aurita seemed to have some potential as a fertilizer, it contained high concentrations of iron (190000 mg/kg) and aluminum (2200 mg/kg), which might be undesirable for the growth of plants. On the other hand, the concentration of total nitrogen (750 mg/kg) in Stomolophus nomurai was 1.8-times higher than that in Aurelia aurita (without aeration), although the concentrations of total phosphorus (2.3 mg/kg) and calcium (75 mg/kg) were 1/6 and 1/4 of those in Aurelia aurita (without aeration). Stomolophus nomurai could also be expected to have potential as a fertilizer. Spinach was cultivated using a suspension of Aurelia aurita and Stomolophus nomurai, and the dried sludge of Aurelia aurita as a fertilizer. Stomolophus nomurai was most effective for the growth of spinach. The high concentrations of iron and aluminum in the dried sludge of Aurelia aurita seemed to decelerate the growth of spinach.