Abstract
A new analytical method and the method validation for the determination of ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA) in lake and sea water is presented. An aqueous sample, after evaporation to dryness, was treated with an esterification reagent. The resulting ethyl ester derivates were determined by capillary gas chromatography using a nitrogen phosphorus specific detector (GC-NPD). The response was linear up to 5 mg L-1. The recoveries from lake-and sea waters were 59-105 % for EDTA and 86-112 % for DTPA. The run-to-run repeatabilities (R.S.D.) were 2-8 % for EDTA and 4-11 % for DTPA depending on concentration and the reproducibilities (R.S.D.) were 6-13 % and 3-11 %, respectively. The limits of detection for EDTA and DTPA were 3 and 12 μg L-1 in distilled water, respectively. The method is simple to use and reliable as shown by the analysis of samples of lake water that is influenced by pulp and paper industry.
| Original language | English |
|---|---|
| Pages (from-to) | 578-582 |
| Number of pages | 5 |
| Journal | Chromatographia |
| Volume | 42 |
| Issue number | 9-10 |
| DOIs | |
| Publication status | Published - 1996 |
| Externally published | Yes |
Keywords
- DTPA determination
- EDTA determination
- Gas chromatography
- Water analysis
ASJC Scopus subject areas
- Analytical Chemistry
- Biochemistry
- Clinical Biochemistry
- Organic Chemistry