№Determination of Trace Arsenic by Solid Substrate-Room Temperature Phosphorescence Quenching Method Based on the Catalyzed Reaction of H2O2 Oxidizing 9-Hydroxy-2,3,4,9-tetrahydro-1,10-anthraquinone

• 来源期刊: 中国化学(英文版)
• 年，卷（期）: 2007,（4）
• 页码范围: 527-530
• 页数: 4页
• 语种: 英文

摘要

A new solid substrate-room temperature phosphorescence(ss-RTP)quenching method for the determination of trace As(V)has been developed,based on the facts that 9-hydroxy-2,3,4,9-tetrahydro-1,10-anthraquinone(R)can emit intense and stable SS-RTP on solid substrate,and a,a'-dipyridyl Can activate As(V)catalysis of the reaction of H2O2 oxidizing R to non-phosphorescence compound R',which Can cause the sharp quenching of SS-RTP.Under the optimum condition,the relationship between the△IP of the emitting intensity and 1.60-160 fg·spot-1 As(V)(corresponding concentration:0.0040-0.40 ng·mL-1,sample volume:0.4μL·spot-1)conformed to Beer'law.The regression equation of working curve can be expressed as △Ip=20.46+0.5492CAs(v)(fg·spot-1)(r=0.9995,n=6).The limit detection(LD)is 0.27 fg·spot-1[As(V)corresponding concentration:6.8×10-13g·mL-1,n=11].The samples containing 0.0040 and 0.40 ng·mL-1 As(V)were repeatedly determined for 11 times.RSD arc 3.0%and 2.7%respectively.The SS-RTP mechanism was also discussed.R was synthesized in this paper.Meanwhile,the structure was determined by NMR,IR,mass spectra and elemental analysis.