| 水样储存期间无机磷酸盐含量的变化 |
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| 引用本文： | 沈志良,刘兴俊,陆家平,刁焕祥.水样储存期间无机磷酸盐含量的变化[J].海洋科学,1985,9(6):29-33. |
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| 作者姓名： | 沈志良 刘兴俊 陆家平 刁焕祥 |
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| 作者单位： | 中国科学院海洋研究所
(沈志良，刘兴俊，陆家平)，中国科学院海洋研究所(刁焕祥) |
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| 摘 要： | 水样的储存直接影响到测定结果的可靠性。水样储存主要包括储存容器的选择、对储存环境的要求以及容器和水样的预处理。关于磷酸盐样品的储存,已有较多的报道。一般认为,水样储存于聚乙烯瓶中,PO_4-P会很快消失、如果快速深度冷冻,则能使样品稳定相当一段时间。有的报道认为,在水样中加入防腐剂氯仿可以减少PO_4-P变化速率;但有的意见认为加氯仿等
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CHANGES IN INORGANIC PHOSPHATE CONCENTRATION DURING WATER SAMPLE STORAGE |
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| Abstract: | In this paper the adsorption of inorganic phosphate by polyethylene bottles, samples storage condition and the pre-treatment of samples and bottles have been discussed. Experiments should that the concentration of phosphate does not change within 24 h, of distilled water solution containing phosphate and phosphote was quickly adsorbed on bottles. The phosphate in seawater samples would be lost very quickly. Therefore, in general, the polyethylene bottles should not be used for the storage of phosphate. The rate of changes of phosphate would go down by adding 0.3%v/v chloroform into the samples. The changes in phosphate concentration were less in the 62 days storage at -25t and the effect was still good for the samples with chloroform. Experiments also showed that the bottles treated with distilled water solution or seawater containing higher phosphate concentration could resist the decrease of the phosphate in samples. |
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