Measurement uncertainty associated with shipboard sample collection and filtration for the determination of the concentration of iron in seawater
Measurement uncertainty associated with shipboard sample collection and filtration for the determination of the concentration of iron in seawater
复制标题
与测定海水中铁浓度的船上样品采集和过滤相关的测量不确定度
DOI：
10.1039/c6ay01551d
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发表时间：
2016
影响因子：
3.1
通讯作者：
Clough R
中科院分区：
文献类型：
--
作者：
Clough R
采用流动注射化学发光检测(FI-CL)方法测定了2011年12月24日至2012年1月27日在詹姆斯·库克号邮轮(JC068号)上进行的GEOTRACES GA10邮轮航行期间在南大西洋采集的海水样品中的溶解铁浓度。使用了六种不同的样本收集和过滤策略。采集了公海(浅海和深海)和沿海(浅海和深水)样本，每个样本中的五个子样本通过滤筒过滤器进行过滤。对于深海样品，分离的子样品也通过膜盘过滤器进行过滤。此外，还从五个不同的采样瓶中采集了深海开阔洋子样本。对每个亚样(共29个)进行了6次分析(共给出174个离散测量)，亚样内精密度在1.4-12.2%范围内。对于深海、开阔海域的样品，用两种不同类型的过滤器或单一样品瓶与单独样品瓶子样品获得的平均结果之间没有统计学上的显著差异。经典方差分析的应用表明，6种抽样策略的相对合成标准不确定度在2.3-3.8%之间。这种方法不包括对抽样偏差的估计。将稳健方差分析应用于深海样本，结果表明，不同的样本采集和过滤策略对总方差的贡献率为0%，子样本精度的贡献率为42%，子样本之间的贡献率为58%。
A flow injection with chemiluminescence detection (FI-CL) method was used to determine the concentration of dissolved iron in seawater samples collected in the South Atlantic during the GEOTRACES GA10 cruise that took place from 24th December 2011–27th January 2012 on board the R.R.S. James Cook (cruise JC068). Six different sample collection and filtration strategies were used. Open ocean (shallow and deep) and coastal (shallow and deep) samples were collected and five sub-samples from each collection were filtered through a cartridge filter. For the deep open ocean sample, separate sub-samples were also filtered through a membrane disc filter. In addition, deep open ocean sub-samples were also taken from five separate sampling bottles. Each sub-sample (29 in total) was analysed six times (giving 174 discrete measurements in total) and the within sub-sample precision was in the range 1.4–12.2%. There was no statistically significant difference for the deep, open ocean sample between the mean results obtained with the two different filter types or the single sample bottle versus separate sample bottle sub-samples. Application of classical ANOVA showed that the relative combined standard uncertainty for each of the six sampling strategies ranged from 2.3–3.8%. This approach did not include an estimation of sampling bias. Application of robust ANOVA to the deep open ocean samples showed that contributions to the total variance were 0% from the different sample collection and filtration strategies, 42% from the sub-sample precision and 58% from between sub-sample measurements.
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DOI：
10.1002/lom3.10057
发表时间：
2015-12
期刊：
Limnology and oceanography, methods
影响因子：
--
作者：
Floor GH;Clough R;Lohan MC;Ussher SJ;Worsfold PJ;Quétel CR
通讯作者：
Quétel CR
应用错流过滤测定公海海水中铁物质的溶解度
DOI：
10.4319/lom.2008.6.630
发表时间：
2008
期刊：
Limnology and Oceanography: Methods
影响因子：
--
作者：
C. Schlosser;P. Croot
通讯作者：
P. Croot
用于优化测量的适当抽样 (ASOM)，而不是抽样理论 (TOS) 方法，可确保适当的测量质量：对 Esbensen 和 Wagner 的反驳 (2014)
DOI：
--
发表时间：
2016
期刊：
影响因子：
--
作者：
M. Ramsey
通讯作者：
M. Ramsey
采样作为测量不确定度的来源：量化技术以及与分析源的比较
DOI：
--
发表时间：
1998
期刊：
影响因子：
--
作者：
M. Ramsey
通讯作者：
M. Ramsey
方法与途径
DOI：
--
发表时间：
2014
期刊：
影响因子：
--
作者：
M. Butler
通讯作者：
M. Butler