Storage of dissolved inorganic nutrients in seawater: poisoning with mercuric chloride
Storage of dissolved inorganic nutrients in seawater: poisoning with mercuric chloride
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DOI：
10.1016/s0304-4203(99)00049-3
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发表时间：
1999-10-01
期刊：
影响因子：
3
通讯作者：
Kattner, G
中科院分区：
文献类型：
--
作者：
Kattner, G
用氯化汞对海水样品进行毒化，评价其对无机营养物长期贮存测量的适用性。我们从公海抽取了两组海水样本，在船上立即测量了硝酸盐、硅酸盐、磷酸盐、亚硝酸盐和铵。同样的样品，每毫升样品（总样品体积为50毫升）中加入105 μ g氯化汞中毒，并在大约1年和2年后再次测量。结果表明，氯化汞法是一种适宜的无机营养物贮藏方法。对硝酸盐、硅酸盐和磷酸盐的直接测定结果与贮存1年和2年后的测定结果吻合较好。测定结果符合或非常接近最佳的1:1关系。亚硝酸盐的差异较大，但由于海洋中浓度普遍较低，这些差异不会对硝酸盐的测定造成严重问题。相反，铵的数据，经过长时间的储存，应小心。(C) 1999 Elsevier Science B.V.版权所有
Seawater samples were poisoned with mercuric chloride to assess its suitability for the long-term storage measurement of inorganic nutrients. Two series of seawater samples from the open ocean were taken, and nitrate, silicate, phosphate, nitrite and ammonium measured immediately on board. The same samples were poisoned by adding 105 mu g of mercuric chloride per milliliter of sample (total sample volume 50 ml) and measured again after about 1 and 2 years storage. The results show that the poisoning with mercuric chloride is a suitable method for the storage of inorganic nutrients. For nitrate, silicate and phosphate a good accordance was found between the direct measurements and those after 1 and 2 years storage. The results of the determinations coincided with, or were very close to the optimal 1:1 relationship. The variations for nitrite were higher, but due to the generally low concentrations in the oceans these differences will cause no serious problems for the nitrate determination. In contrast, ammonium data, obtained after long storage periods, should be taken with care. (C) 1999 Elsevier Science B.V. All rights reserved.