A SINGLE-SOLUTION METHOD FOR THE DETERMINATION OF SOLUBLE PHOSPHATE IN SEA WATER
A SINGLE-SOLUTION METHOD FOR THE DETERMINATION OF SOLUBLE PHOSPHATE IN SEA WATER
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DOI：
10.1017/s0025315400014776
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发表时间：
1958-01-01
影响因子：
1.2
通讯作者：
RILEY, JP
中科院分区：
文献类型：
--
作者：
MURPHY, J;RILEY, JP
建立了用抗坏血酸测定海水中可溶性磷酸盐的方法。海水样品(40毫升)用8毫升混合试剂、2.5[图像]在硫酸中、0.60%钼酸铵和0.03[图像]在抗坏血酸中处理。将生成的溶液稀释到50毫升，在室温下24小时后，或加热到60摄氏度30分钟后，在827米处测量其光密度。这种颜色一旦显影，就会无限期地稳定下来。当海水含氯量为19.3%O时，盐的误差约为4%。海水中砷或硅酸盐的正常浓度对测定结果的干扰可忽略不计。
The use of ascorbic acid for the determination of soluble phosphate in sea water has been developed. The sea water sample (40 ml) is treated with 8 ml of a mixed reagent, 2.5 [image] in sulfuric acid, 0.60% in ammonium molyb-date, and 0.03 [image] in ascorbic acid. The resultant solution is diluted to 50 ml. Its optical density is measured at 827 m[upsilon] after 24 hours, at room temperature, or after heating to 60[degree]C for 30 minutes. The color, once developed, is stable indefinitely. Beer''s Law is obeyed closely up to at least 500 [upsilon]g PO3 4 P/l. The salt error is approximately 4% with sea water of chlorinity 19.3%O. The interference caused by either arsenic or silicate at their normal concentrations in sea water is negligible.