CAJ | 학술논문

建立了一种同时测定水中痕量三苯胂和二苯胂酸的方法, 使用巯基乙酸甲酯作为二苯胂酸测定的衍生化试剂, 固相微萃取耦合气相色谱-质谱法(选择离子监测)同时测定三苯胂和二苯胂酸. 优化了萃取纤维丝、萃取时间、衍生化等操作条件. 同时对混合物测定的回收率、相对标准偏差和最低检测限进行了研究. 方法的回收率大于95%, 最低检测质量浓度分别为0.0005和0.0003 mg/L, 6次测定的相对标准偏差分别为5.3%、 7.6%.
건립료일충동시측정수중흔량삼분신화이분신산적방법, 사용구기을산갑지작위이분신산측정적연생화시제, 고상미췌취우합기상색보-질보법(선택리자감측)동시측정삼분신화이분신산. 우화료췌취섬유사、췌취시간、연생화등조작조건. 동시대혼합물측정적회수솔、상대표준편차화최저검측한진행료연구. 방법적회수솔대우95%, 최저검측질량농도분별위0.0005화0.0003 mg/L, 6차측정적상대표준편차분별위5.3%、 7.6%.
A new method of derivatization solid-phase microextraction (SPME) coupled with gas chromatography-mass spectrometry (GC-MS) for the determination of triphenylarsine (TPA) and diphenylarsinic acid (DPAA) in water has been developed. Using 100 μm polydimethylsiloxane (PDMS) fibers, the influence of several parameters on the SPME and derivatization procedure such as the extraction time of the fiber in the aqueous sample, derivatization time and temperature, the desorption time and temperature, pH value have been studied. The lowes detection concentration is 0.0005 mg/L and 0.0003 mg/L respectively. The spiked recoveries are larger than 95%. The relative standard deviations for 6 runs are 5.3% and 7.6% respectively.