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A new software of calculating the pH values of coastal seawater: Considering the effects of low molecular weight organic acids

机译：一种计算沿海海水pH值的新软件：考虑低分子量有机酸的影响

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摘要

Effects of low molecular weight organic acids (LMWOAs) on the pH value of seawater were investigated in the surface seawater of the Jiaozhou Bay, China. The new software of Org center dot TCO2TA was developed to calculate the pH values of seawater based on the alkalinity (Alk) equation where organic acid Alk (Org-Alk) was separated into LMWOA Alk (LMWOA-Alk) and humic acid Alk (HA-Alk). In the calculations, all dissociation constants of organic acids were from previous literature. In our study, the average concentration of total LMWOAs was 14.5 +/- 11.2 mu mol.kg(-1) SW. pH values from the Org center dot TCO2TA software were closer to the pH values from spectrophotometric measurement than those from the CO2SYS program, indicating pH values can be influenced by high concentrations of LMWOAs in coastal seawater of the Jiaozhou Bay. Although the differences still existed between the pH values from the spectrophotometric method and the calculated pH values from the Org center dot TCO2TA software due to the influence of various factors, including the analytical errors of dissolved inorganic carbon and nutrients, the new software can calculate the pH values of coastal seawater more accurately by considering the effects of LMWOAs.
机译：研究了胶州湾表层海水中低分子量有机酸（LMWOA）对海水pH值的影响。开发了Org中心点TCO2TA的新软件，根据碱度（Alk）方程计算海水的pH值，其中有机酸Alk（Org-Alk）分为LMWOA Alk（LMWOA-Alk）和腐殖酸Alk（HA） -Alk）。在计算中，有机酸的所有解离常数均来自先前的文献。在我们的研究中，总LMWOAs的平均浓度为14.5 +/- 11.2μmol.kg（-1）SW。 Org中心点TCO2TA软件的pH值比分光光度法测量的pH值更接近于CO2SYS程序的pH值，表明pH值可能受到胶州湾沿岸海水中高浓度LMWOAs的影响。尽管由于各种因素（包括溶解的无机碳和养分的分析误差）的影响，分光光度法的pH值与Org中心点TCO2TA软件计算的pH值之间仍然存在差异，但新软件可以计算考虑到LMWOAs的影响，可以更准确地确定沿海海水的pH值。

著录项

  • 来源
    《Marine Chemistry》 |2019年第20期|108-116|共9页
  • 作者

    Lyu Li-Na; Lu Daoming; Sun Chengjun; Ding Haibing; Yu Liang-Min; Yang Gui-Peng;

  • 作者单位

    Ocean Univ China, Coll Chem & Chem Engn, 238 Songling Rd, Qingdao 266100, Shandong, Peoples R China|Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou, Guangdong, Peoples R China;

    Zhenjiang Coll, Coll Chem & Mat Engn, Zhenjiang, Jiangsu, Peoples R China;

    Ocean Univ China, Coll Chem & Chem Engn, 238 Songling Rd, Qingdao 266100, Shandong, Peoples R China|State Ocean Adm, Inst Oceanog 1, Marine Ecol Ctr, Qingdao, Shandong, Peoples R China;

    Ocean Univ China, Coll Chem & Chem Engn, 238 Songling Rd, Qingdao 266100, Shandong, Peoples R China|Ocean Univ China, Minist Educ, Key Lab Marine Chem Theory & Technol, 238 Songling Rd, Qingdao 266100, Shandong, Peoples R China|Ocean Univ China, Qingdao Collaborat Innovat Ctr Marine Sci & Techn, Qingdao, Shandong, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao, Shandong, Peoples R China;

    Ocean Univ China, Coll Chem & Chem Engn, 238 Songling Rd, Qingdao 266100, Shandong, Peoples R China|Ocean Univ China, Minist Educ, Key Lab Marine Chem Theory & Technol, 238 Songling Rd, Qingdao 266100, Shandong, Peoples R China;

    Ocean Univ China, Coll Chem & Chem Engn, 238 Songling Rd, Qingdao 266100, Shandong, Peoples R China|Ocean Univ China, Minist Educ, Key Lab Marine Chem Theory & Technol, 238 Songling Rd, Qingdao 266100, Shandong, Peoples R China|Ocean Univ China, Qingdao Collaborat Innovat Ctr Marine Sci & Techn, Qingdao, Shandong, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao, Shandong, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Organic acid; pH; Coastal seawater; Jiaozhou Bay;

    机译：有机酸pH沿海海水胶州湾;

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