ID | 118161 |
著者 |
Shichijo, Maria
Tokushima University
Okamoto, Kazumasa
Tokushima University
Takahashi, Toru
Tokushima University
Nomura, Miharu
Tokushima University
Ohira, Shin-ichi
Kumamoto University
|
キーワード | Automated
Flow analysis
Nitrite
Seawater
Standard addition method
|
資料タイプ |
学術雑誌論文
|
抄録 | The standard addition method is a powerful tool to eliminate matrix interferences and enables accurate determinations, but it is time-consuming and labor-intensive. This paper proposes a feedback standard addition method coupled flow injection analysis, FB-SAM/FIA, for the rapid and accurate determination of trace interest in seawater samples. This approach automatically prepares spiked samples by feeding back the peak height in the fiagram, thus significantly improving the sample throughput compared to the manual standard addition method. Spectrophotometric determination of NO2- with the Griess assay was used as an evaluation model. The proposed technique demonstrated a sample throughput of 3 samples/h, ranging from 0.0050 mg L-1 (LOD) to 0.125 mg L-1 NO2-. The accuracies of NO2- determination with FB-SAM/FIA and an absolute calibration method were tested using natural seawater and pseudo-seawater samples containing 0.040 mg L-1 NO2- in 0, 1, 2, 3, and 4% sodium chloride media. With the absolute calibration method, the calculated concentration increased with an increase in salinity, reaching an overestimation of about 40%. On the other hand, FB-SAM/FIA suppressed the errors in the range of -7.8% to 1.3% and applied successfully to the determination of NO2- in the natural seawater samples.
|
掲載誌名 |
Microchemical Journal
|
ISSN | 0026265X
10959149
|
cat書誌ID | AA00738394
AA11649128
AA1153491X
|
出版者 | Elsevier
|
巻 | 190
|
開始ページ | 108721
|
発行日 | 2023-04-03
|
備考 | 論文本文は2025-04-03以降公開予定
|
権利情報 | © 2023. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
|
EDB ID | |
出版社版DOI | |
出版社版URL | |
言語 |
eng
|
著者版フラグ |
その他
|
部局 |
理工学系
薬学系
|