| 用达旦黄比色法测定水稻Mg含量 |
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| 引用本文： | 李延,邵冬白,阴长林,秦遂初.用达旦黄比色法测定水稻Mg含量[J].福建农林大学学报(自然科学版),1995(3). |
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| 作者姓名： | 李延 邵冬白 阴长林 秦遂初 |
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| 作者单位： | 福建农业大学土地与环境学系，浙江农业大学土地科学与应用化学系 |
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| 摘 要： | 采用达旦黄比色法定量测定水稻植株Ｍｇ含量时，其显色液在５５０ｎｍ处有最大吸收值，显色剂（０．１％达旦黄）的适宜用量是２ｍＬ，显色稳定时间为４ｈ，Ｍｇ比色测定的线性范围是（Ｍｇ２＋）０．５０—２．５０ｍｇ·Ｌ－１，主要干扰离子可加入三乙醇胺和邻菲罗啉消除，用比色法测得的水稻植株含Ｍｇ量与原子吸收光谱法测定结果呈极显著正相关（ｒ＝０．９９，ｎ＝４９），比色法用于水稻分蘖期Ｍｇ素诊断的临界质量分数是０．１４×１０－２Ｍｇ２＋，该方法还可用于植株Ｍｇ的速测．
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| 关 键 词： | 水稻 Mg 达旦黄比色法 |
Spectrophotometric Determination of Magnesium in Rice with Titan Yellow |
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| Li Yan, Shao Dongbai,Yin Changlin,Qin Suichu.Spectrophotometric Determination of Magnesium in Rice with Titan Yellow[J].Journal of Fujian Agricultural and Forestry University,1995(3). |
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| Authors: | Li Yan Shao Dongbai Yin Changlin Qin Suichu |
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| Abstract: | This is a new method for determining magnesium in rice plant. The maximum absorption wavelength of the complex was at 550 nm.Optimum does of 0.1% titan yellow was 2mL.The colour stood stably within 4 hours.The calibration curve was linear in the range from 0.5 to 2.5 mg·L-1 Mg2+.The method was compared with atomic absorption spectrometry,showing a significant correlation in the results(r=0.99 n=49).Magnesium (Mg)critical concentration determined by spectrophotometry was 0.14×10-2.This method can also be used for magnesium rapid test. |
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| Keywords: | rice magnesium titan yellow spectrophotometry determination |
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