环境监测管理与技术
環境鑑測管理與技術
배경감측관리여기술
THE ADMINISTRATION AND TECHNIQUE OF ENVIRONMENTAL MONITORING
2014年
3期
38-40
,共3页
王荟%穆肃%章勇%张蓓蓓%胡冠九
王薈%穆肅%章勇%張蓓蓓%鬍冠九
왕회%목숙%장용%장배배%호관구
多氯萘%固相萃取%气相色谱 -高分辨双聚焦磁质谱法%水质
多氯萘%固相萃取%氣相色譜 -高分辨雙聚焦磁質譜法%水質
다록내%고상췌취%기상색보 -고분변쌍취초자질보법%수질
PCNs%Solid phase extract%Gas chromatography-double-focusing high-resolution magnetic mass%Water quality
采用固相萃取法处理水样,气相色谱-高分辨双聚焦磁质谱法测定水中超痕量多氯萘,同位素内标法定量,并对样品前处理条件和仪器条件进行优化。试验表明:方法在0.500 ng/L~500 ng/L范围内线性良好;当取样体积为1 L时,方法检出限为0.005 ng/L~0.01 ng/L;对实际水样进行2个质量浓度水平的加标回收试验,平行测定6次的 RSD为2.7%~8.7%,回收率为70.2%~110%。方法适用性试验表明,水样中复杂的基质对测定无影响。
採用固相萃取法處理水樣,氣相色譜-高分辨雙聚焦磁質譜法測定水中超痕量多氯萘,同位素內標法定量,併對樣品前處理條件和儀器條件進行優化。試驗錶明:方法在0.500 ng/L~500 ng/L範圍內線性良好;噹取樣體積為1 L時,方法檢齣限為0.005 ng/L~0.01 ng/L;對實際水樣進行2箇質量濃度水平的加標迴收試驗,平行測定6次的 RSD為2.7%~8.7%,迴收率為70.2%~110%。方法適用性試驗錶明,水樣中複雜的基質對測定無影響。
채용고상췌취법처리수양,기상색보-고분변쌍취초자질보법측정수중초흔량다록내,동위소내표법정량,병대양품전처리조건화의기조건진행우화。시험표명:방법재0.500 ng/L~500 ng/L범위내선성량호;당취양체적위1 L시,방법검출한위0.005 ng/L~0.01 ng/L;대실제수양진행2개질량농도수평적가표회수시험,평행측정6차적 RSD위2.7%~8.7%,회수솔위70.2%~110%。방법괄용성시험표명,수양중복잡적기질대측정무영향。
A method for ultra-trace PCNs in water was established by solid-phase extraction-gas chromatogra-phy-double-focusing high-resolution mass spectrometry.The influencing factors were discussed such as solid-phase extraction solvent,solid phase extraction column and electron bombardment energy.The good linearity of the method was obtained from 0.500 ng/L to 500 ng/L,detection limits of the method from 0.005 ng/L to 0.01 ng/L at 1 L sample,recoveries of matrix samples from 70.2% to 1 10%,RSD from 2.7% to 8.7%.This method has high selec-tivity,high sensitivity and high precision,which can monitor PCNs in complex matrices perfectly.