Abstract
For easy, rapid and economical analysis of steel sample, a continuous flow system was developed by both methods of chemiluminescence (CL) detection and continuous sample flow injection. The system was consisted of 4 channels and analytical time required was less than 30 sec and RSD was less than 2.8 % in 5 repeated runs by using the boron standard solution. Lower detection limit and range of determination were 3x10-7 M and from 1.0x10-6 M to 9.6x10-4 M, respectively. Selectivity of the proposed system was good and interference by another foreign compounds such as AlCl3 and Ni(NO3)2 was negligible small in 1000 times higher concentration of their compounds to boron. In some real steel sample analyses, their determined values agreed with their certified ones, and then the reliabilities were less than 4.4 % in terms of relative error in 3 repeated tests. Additionally, concerning the background CL determination for real steel sample, the D-sorbitol solution should be changed to the purified water, since residual acid after the steel sample preparation might be existed in the system. Also, the steel sample solution should be adjusted to the higher pH than 4.
