RAPID NORMAL RAMAN-SPECTROSCOPY OF SUB-PPM OXY-ANION SOLUTIONS - THE ROLE OF ELECTROPHORETIC PRECONCENTRATION

被引：32

作者：

KOWALCHYK, WK ^{[1
]}

WALKER, PA ^{[1
]}

MORRIS, MD ^{[1
]}

机构：

[1] UNIV MICHIGAN,DEPT CHEM,ANN ARBOR,MI 48109

来源：

APPLIED SPECTROSCOPY | 1995年 / 49卷 / 08期

关键词：

RAMAN SPECTROSCOPY; CAPILLARY ELECTROPHORESIS; SAMPLE PRECONCENTRATION;

D O I：

10.1366/0003702953965137

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Normal Raman spectroscopy is used as an on-line detector for capillary electrophoresis (CE) to detect sub-ppm mixtures of nitrate and perchlorate in water. Field-amplified injection, a form of sample stacking, into a running electrolyte of 0.1 M KCL increases the analyte concentration at the detection window by up to 1800 times its starting value. Raman bands of nitrate (1047 cm(-1)) and perchlorate (934 cm(-1)) are measured in a total separation time of less than 3 min, with only 1-s integration times. The Raman spectroscopy of solutions originally 1 x 10(-5) M nitrate (620 ppb) and perchlorate (1 ppm) is demonstrated.

引用

页码：1183 / 1188

页数：6

共 26 条

[1] AXIAL TRANSMISSIVE F/1.8 IMAGING RAMAN SPECTROGRAPH WITH VOLUME-PHASE HOLOGRAPHIC FILTER AND GRATING [J].