Elemental analysis of chemical wastes by oxygen bomb combustion-ion chromatography

✍ Scribed by Y.S. Fung; K.L. Dao

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 513 KB
• Volume: 334
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(96)00320-0

✦ Synopsis

The oxygen combustion bombion chromatography was applied for the analysis of F, Cl, Br, P and S in organic compounds and hazardous wastes using non-suppressed ion chromatography (IC) with indirect photometric detection. A large quantity of CO* generated during combustion was found to give high levels of carbonate in the sample solution, cause baseline disturbance for IC determination, and give rise to interference for the determination of F-, Cl-and Br-at ug/ml level. The pre-treatment of the absorption solution using ion-exchange resin (H+-form) was shown to remove the carbonate interference while retaining the analyte anions with over 96% recoveries. The determination of low levels of bromide (2pg/ml) was affected significantly by the presence of nitrate (>25 l&ml). A large variety of chemical wastes had been analysed using the analytical procedure developed and the reliability of the method was established by parallel method comparison. With linear ranges up to 3 orders of magnitudes and detection limits at sub-ug/ml level, the method developed was found to be applicable for all the wastes encountered except those with high nitrate and low bromide content.