Comparison of soluble reactive phosphorus and orthophosphate concentrations in river waters
Comparison of soluble reactive phosphorus and orthophosphate concentrations in river waters
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DOI：
10.1007/s10201-015-0463-6
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发表时间：
2015
期刊：
影响因子：
1.6
通讯作者：
M. Maruo;M. Ishimaru;Yuma Azumi;Yukihiro Kawasumi;O. Nagafuchi;H. Obata
中科院分区：
文献类型：
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作者：
M. Maruo;M. Ishimaru;Yuma Azumi;Yukihiro Kawasumi;O. Nagafuchi;H. Obata
比较了用分光光度法(可溶性活性磷，SRP)和离子色谱法(仅用正磷酸盐)测定的日本志贺市琵琶湖入湖河流和出湖河流(塞塔河)淡水中磷的含量。大容量进样和高容量离子色谱柱使正磷酸盐离子的检测水平低于10nmoL/L。在流入琵琶湖的河水中，正磷酸盐与SRP的比率在0.06~0.79之间，不同河流之间差异很大。这一结果表明，天然水体中溶解性磷的分级测定对了解其生物有效性具有重要意义。
The concentrations of phosphorus determined by spectrophotometric analysis (soluble reactive phosphorus; SRP) and ion chromatography (orthophosphate only) were compared in fresh water from inflowing rivers of Lake Biwa (Shiga, Japan) and its outflow (Seta River). The high-volume sample injection and high-capacity analytical column used for ion chromatography enabled detection of orthophosphate ions at levels below 10 nmol/l. In river waters sampled from inflows to Lake Biwa, the ratios of orthophosphate to SRP ranged from 0.06 to 0.79, and varied considerably between rivers. This result shows that the fractional determination of dissolved phosphorus in natural waters is important for understanding its bioavailability.