Feasibility Study on the Application of Automatic Potentiometric Titrator in the Measurement of Organic Carbon in Marine Sediments

Bing WANG; Feng-lei GAO; Pei-hua YANG; Cheng-jun SUN; Bin HAN

doi:10.15898/j.cnki.11-2131/td.2016.04.011

2016 Vol. 35, No. 4

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Bing WANG, Feng-lei GAO, Pei-hua YANG, Cheng-jun SUN, Bin HAN. Feasibility Study on the Application of Automatic Potentiometric Titrator in the Measurement of Organic Carbon in Marine Sediments[J]. Rock and Mineral Analysis, 2016, 35(4): 402-408. doi: 10.15898/j.cnki.11-2131/td.2016.04.011

Citation:

Bing WANG, Feng-lei GAO, Pei-hua YANG, Cheng-jun SUN, Bin HAN. Feasibility Study on the Application of Automatic Potentiometric Titrator in the Measurement of Organic Carbon in Marine Sediments[J]. Rock and Mineral Analysis, 2016, 35(4): 402-408. doi: 10.15898/j.cnki.11-2131/td.2016.04.011

Feasibility Study on the Application of Automatic Potentiometric Titrator in the Measurement of Organic Carbon in Marine Sediments

The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

More Information

Corresponding author: Bin HAN, hanbin@fio.org.cn

Received Date: 25 February 2016

Revised Date: 05 May 2016

Accepted Date: 20 May 2016

Abstract

Abstract

The automatic potentiometric titrator has the advantages of being simple to operate and giving fast measurement results, which could reduce artifical influence due to manual operation. In this study, organic carbon content of marine sediments was determined by Automatic Potentiometric Titrator. In order to investigate if the Automatic Potentiometric Titrator could accurately determine the titration end-point, this method was compared with the national standard method (GB 17378.5-2007) in which the titration end-point was visually determined through color change. Results show that the detection limits of the automatic potentiometric titrator and manual methods were 0.029% and 0.086%, respectively. There are no significant differences between the two methods in titration end-point determination. However, the Automatic Potentiometric Titrator has better accuracy and precision than manual operation. Therefore, under certain circumstances, Automatic Potentiometric Titrator can take over the visual method to determine the titration end-point. It is also noteworthy that there are some problems in measuring real samples. For example, the Automatic Potentiometric Titrator might be unable to accurately determine the target titration end-point when there are complex electrical potential changes due to redox reactions and chelating interactions in the reaction system. On this occasion, the titration end-point can be determined visually.
- marine sediments /
- organic carbon /
- Automatic Potentiometric Titrator /
- determination of the titration end-point /
- redox potential

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References

[1]	曲建升,孙成权,张志强,等.全球变化科学中的碳循环研究进展与趋向[J].地球科学进展,2003,18(6):980-987. Google Scholar Qu J S,Sun C Q,Zhang Z Q,et al.Trends and Advances of the Global Chance Studies on Carbon Cycle[J].Advance in Earth Sciences,2003,18(6):980-987. Google Scholar
[2]	Ni H G,Lu F H,Luo X L,et al.Riverine Inputs of Total Organic Carbon and Suspended Particulate Matter from the Pearl River Delta to the Coastal Ocean off South China[J].Marine Pollution Bulletin,2008,56(6):1150-1157. doi: 10.1016/j.marpolbul.2008.02.030 CrossRef Google Scholar
[3]	Ziegler M,Jilbert T,de Lange G J,et al.Bromine Counts from XRF Scanning as an Estimate of the Marine Organic Carbon Content of Sediment Cores[J].Geochemistry,Geophysics,Geosystems,2008,9(5):303-307. Google Scholar
[4]	周述琼,章骅,但德忠.水中总有机碳测定方法研究进展[J].四川环境,2006,25(2):111-115. Google Scholar Zhou S Q,Zhang H,Dan D Z.Progress on Methods for Determination of TOC in Water[J].Sichuan Environment,2006,25(2):111-115. Google Scholar
[5]	Hansell D A,Peltzer E T.Spatial and Temporal Varia-tions of Total Organic Carbon in the Arabian Sea[J].Deep Sea Research PartⅡ:Topical Studies in Oceanography,1998,45(10):2171-2193. Google Scholar
[6]	Martinez-Soto M C,Martínez G.Organic Carbon,Phosp-horus and Nitrogen in Surface Sediments of the Marine-Coastal Region North and South of the Paria Peninsula,Venezuela[J].Environmental Earth Sciences,2012,65(2):429-439. doi: 10.1007/s12665-011-1319-y CrossRef Google Scholar
[7]	Stolpovsky K,Dale A W,Wallmann K.Toward a Para-meterization of Global-scale Organic Carbon Mineralization Kinetics in Surface Marine Sediments[J].Global Biogeochemical Cycles,2015,29:812-829. doi: 10.1002/2015GB005087 CrossRef Google Scholar
[8]	于雯泉,钟少军.海洋沉积物有机碳分析方法中干燥预处理过程人为误差的发现及其意义[J].环境科学学报,2007,27(5):861-867. Google Scholar Yu W Q,Zhong S J.Freeze-drying Pretreatment Improves Organic Carbon Determination of Marine Sediments[J].Acta Scientiae Circumstantiae,2007,27(5):861-867. Google Scholar
[9]	刘昌岭,朱志刚,贺行良,等.重铬酸钾氧化-硫酸亚铁滴定法快速测定海洋沉积物中有机碳[J].岩矿测试,2007,26(3):205-208. Google Scholar Liu C L,Zhu Z G,He X L,et al.Rapid Determination of Organic Carbon in Marine Sediment Samples by Potassium Dichromate Oxidation-Ferrous Sulphate Titrimetry[J].Rock and Mineral Analysis,2007,26(3):205-208. Google Scholar
[10]	黄颖华,张浩.两种测定海洋沉积物中总有机碳方法的比较[J].广西科学院学报,2013,29(4):227-229. Google Scholar Huang Y H,Zhang H.Comparison of Two Methods for Determining Total Organic Carbon Content in Marine Sediment[J].Journal of Guangxi Academy of Sciences,2013,29(4):227-229. Google Scholar
[11]	Shi X F,Shen S X,Yi H,et al.Modern Sedimentary Environments and Dynamic Depositional Systems in the Southern Yellow Sea[J].Chinese Science Bulletin,2003,48(1):1-7. doi: 10.1007/BF03183324 CrossRef Google Scholar
[12]	孙萱,宋金明,于颖,等.元素分析仪快速测定海洋沉积物TOC和TN 的条件优化[J].海洋科学,2014,38(7):14-19. Google Scholar Sun X,Song J M,Yu Y,et al.A Rapid Method for Determing the Total Organic Carbon and Total Nitrogen in Marine Sediments with an Elemental Analyzer[J].Marine Sciences,2014,38(7):14-19. Google Scholar
[13]	马德起,谷松海,张国胜,等.自动电位滴定测定锰矿石中锰的方法研究[J].岩矿测试,2013,32(4):595-599. Google Scholar Ma D Q,Gu S H,Zhang G S,et al.Determination of Total Manganese in Manganese Ores with an Automatic Potentiometric Titration Method[J].Rock and Mineral Analysis,2013,32(4):595-599. Google Scholar
[14]	郝会军,杨俐苹,金继运.自动电位滴定法测定土壤有机质含量[J].中国土壤与肥料,2011(1):83-87. Google Scholar Hao H J,Yang L P,Jin J Y.Determination of Soil Organic Matter by Automatically Potentiometric Titration Method[J].Soils and Fertilizers Sciences in China,2011(1):83-87. Google Scholar
[15]	Cristiano B F G,Delgado J U,da Silva J W S,et al.Semi-automated Potentiometric Titration Method for Uranium Characterization[J].Applied Radiation and Isotopes,2012,70(7):1373-1375. doi: 10.1016/j.apradiso.2011.11.025 CrossRef Google Scholar
[16]	Medwick T,Kirschner E.Evaluation of Automatic Poten-tiometric Titrator in Nonaqueous Titrations[J].Journal of Pharmaceutical Sciences,1966,55(11):1296-1300. doi: 10.1002/jps.2600551126 CrossRef Google Scholar
[17]	李小涵,王朝辉.两种测定土壤有机碳方法的比较[J].分析仪器,2009(5):78-80. Google Scholar Li X H,Wang Z H.Comparison of Two Soil Organic Carbon Determination Methods[J].Analytical Instru-mentation,2009(5):78-80. Google Scholar
[18]	徐金龙,刘中勇,华斌,等.分析化学中检出限问题探讨[J].检验检疫学刊,2012,22(6):74-76. Google Scholar Xu J L,Liu Z Y,Hua B,et al.Discussion of Detection Limit Concept Question in Analytical Chemistry[J].Journal of Inspection and Quarantine,2012,22(6):74-76. Google Scholar
[19]	周作明,周琪.Fe(Ⅱ)-EDTA/K₂S₂O₈降解苯酚及反应动力学分析[J].化工进展,2012,31(5):1154-1159. Google Scholar Zhou Z M,Zhou Q.Mechanism and Kinetics Analysis of the Phenol Degradation by Fe(Ⅱ)-EDTA/K₂S₂O₈ Process[J].Chemical Industry and Engineering Progress,2012,31(5):1154-1159. Google Scholar
[20]	高迎新,张昱,杨敏.Fenton反应中氧化还原电势的变化规律[J].环境化学,2004,23(2):135-139. Google Scholar Gao Y X,Zhang Y,Yang M.Characteristics of ORP in Fenton's Reaction[J].Environmental Chemistry,2004,23(2):135-139. Google Scholar
[21]	赵怀颖,吕庆斌,巩爱华,等.自动电位滴定技术精确测定铜矿石中高含量铜的方法研究[J].岩矿测试,2015,34(6):672-677. Google Scholar Zhao H Y,Lü Q B,Gong A H,et al.Accurate Measurement of High Copper in Copper Ores with Automatic Potentiometric Titration Technique[J].Rock and Mineral Analysis,2015,34(6):672-677. Google Scholar