CAJ | 학술논문

报道了在优化样品前处理、燃烧温度、最小加氧量和最佳称样量的基础上,综合构建优化了直接固体进样varioMACRO cube元素分析仪同时测定海洋沉积物样品中总有机碳(TOC)和总氮(TN)的条件,即准确称取20~30 mg沉积物样品用1 mol/L盐酸除去无机碳后,直接进样在燃烧管温度960℃,次级燃烧管温度830℃,还原管温度900℃,氦气压力0.12 MPa,流量600 mL/min,氧气压力0.20 MPa,加氧量22.5 mL仪器条件下,用标准曲线法峰面积获取TOC和TN浓度。结果表明,海洋沉积物中TOC和TN 测定的检出限分别为0.0508%和0.0146%,回收率分别为97.7%~100.9%和97.2%~101.1%,对4个实际外海沉积物样测定总有机碳和总氮结果的相对标准偏差(RSD)为0.83%~3.06%和1.33%~3.49%(n=12)。该方法操作简便快速、灵敏度高,具有较好的精密度和准确度,可准确可靠地用于海洋沉积物中总有机碳和总氮含量的测定。
보도료재우화양품전처리、연소온도、최소가양량화최가칭양량적기출상,종합구건우화료직접고체진양varioMACRO cube원소분석의동시측정해양침적물양품중총유궤탄(TOC)화총담(TN)적조건,즉준학칭취20~30 mg침적물양품용1 mol/L염산제거무궤탄후,직접진양재연소관온도960℃,차급연소관온도830℃,환원관온도900℃,양기압력0.12 MPa,류량600 mL/min,양기압력0.20 MPa,가양량22.5 mL의기조건하,용표준곡선법봉면적획취TOC화TN농도。결과표명,해양침적물중TOC화TN 측정적검출한분별위0.0508%화0.0146%,회수솔분별위97.7%~100.9%화97.2%~101.1%,대4개실제외해침적물양측정총유궤탄화총담결과적상대표준편차(RSD)위0.83%~3.06%화1.33%~3.49%(n=12)。해방법조작간편쾌속、령민도고,구유교호적정밀도화준학도,가준학가고지용우해양침적물중총유궤탄화총담함량적측정。
A method fordeterming the total organic carbon (TOC) and total nitrogen (TN) in marine sediment samplesbysimultaneouslyinjectingsolid sample into vario MACRO cube elemental analyzer was reported. The determination conditions wereoptimizedby sample pretreatment, combustion temperature, the oxygen volume and sample weight et al..Twenty (20)-30mg accurately weighed sediment samples with 1mol/L hydrochloric acid to remove inorganic carbon were injected directlyto the elemental analyzer.The concentrations of TOC and TN were calculated by standard curves with combustion tube temperatureat 960℃, post combustion tube temperature at 830℃, reduction tube temperature at 900℃, helium pressure 0.12 MPa, flow 600 mL/min,oxygen pressure 0.20 MPa, and oxygen volume22.5 mL. The detection limits of TOC and TN were 0.0508% and 0.0146%, and the recoveries were 97.7%~ 100.9% and 97.2%~101.1%, respectively. The RSDs of TOC and TN in four marine sediment samples (n=12) were 0.83%~3.06% and 1.33%~3.49%,respectively. The method was simple, fast, sensitive, precise, and accurate, and is suitable for analysis of TOC and TN inmarine sediment samples.