Direct determination of Calcium in milk by atomic absorption spectrometry using flow-injection analysis
Fuente:
Redalyc
Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidade Estadual Paulista Júlio de Mesquita Filho
2007
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1876477608916418560 |
|---|---|
| author | M.B. Petrovich |
| author_facet | M.B. Petrovich |
| contents | Direct determination of Calcium in milk by atomic absorption spectrometry using flow-injection analysis M.B. Petrovich V. R. A. Filho J. A. G. Neto Química milk flow Calcium injection analysis flame atomic absorption spectrometry A flow-injection system with sample and reagent addition by the synchronousmerging zones approach for calcium determination in milk by flame AAS is proposed. Mainparameters were optimized using a factorial design with central point. The optimum conditionswere 2.5% (m/v) for La concentration, 8 mL min-1 for the carrier flow-rate, 20 cm for coiledreactor and 250 ìL for sample volume. Different sample preparation procedures were evaluatedsuch as dilution in water or acid and microwave-assisted decomposition using concentratedor diluted acids. The optimized flow system was applied to determine Ca in eleven commercialmilk samples and two standard reference materials diluted in water. Similar calcium levelswere encountered comparing the results obtained by the proposed method (dilution in water)with those obtained using microwave-oven digestion. Results obtained in two standard referencematerials were in agreement at 95% confidence level with those certified. Recoveries of spikedsamples were in the 93% - 116% range. Relative standard deviation (n = 12) was < 5.4%and the sample throughput was 150 measurements per hour, corresponding to a consumptionof 250 μL of sample and 6.25 mg La per determination. 2007 artículo científico 0100-4670 https://www.redalyc.org/articulo.oa?id=42932304 en http://www.redalyc.org/revista.oa?id=429 Eclética Química application/pdf Universidade Estadual Paulista Júlio de Mesquita Filho Eclética Química (Brasil) Num.3 Vol.32 |
| format | Artículo científico |
| id | redalyc_42932304 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Universidade Estadual Paulista Júlio de Mesquita Filho |
| spellingShingle | Direct determination of Calcium in milk by atomic absorption spectrometry using flow-injection analysis M.B. Petrovich Química milk flow Calcium injection analysis flame atomic absorption spectrometry Direct determination of Calcium in milk by atomic absorption spectrometry using flow-injection analysis M.B. Petrovich V. R. A. Filho J. A. G. Neto Química milk flow Calcium injection analysis flame atomic absorption spectrometry A flow-injection system with sample and reagent addition by the synchronousmerging zones approach for calcium determination in milk by flame AAS is proposed. Mainparameters were optimized using a factorial design with central point. The optimum conditionswere 2.5% (m/v) for La concentration, 8 mL min-1 for the carrier flow-rate, 20 cm for coiledreactor and 250 ìL for sample volume. Different sample preparation procedures were evaluatedsuch as dilution in water or acid and microwave-assisted decomposition using concentratedor diluted acids. The optimized flow system was applied to determine Ca in eleven commercialmilk samples and two standard reference materials diluted in water. Similar calcium levelswere encountered comparing the results obtained by the proposed method (dilution in water)with those obtained using microwave-oven digestion. Results obtained in two standard referencematerials were in agreement at 95% confidence level with those certified. Recoveries of spikedsamples were in the 93% - 116% range. Relative standard deviation (n = 12) was < 5.4%and the sample throughput was 150 measurements per hour, corresponding to a consumptionof 250 μL of sample and 6.25 mg La per determination. 2007 artículo científico 0100-4670 https://www.redalyc.org/articulo.oa?id=42932304 en http://www.redalyc.org/revista.oa?id=429 Eclética Química application/pdf Universidade Estadual Paulista Júlio de Mesquita Filho Eclética Química (Brasil) Num.3 Vol.32 |
| title | Direct determination of Calcium in milk by atomic absorption spectrometry using flow-injection analysis |
| topic | Química milk flow Calcium injection analysis flame atomic absorption spectrometry |
| url | https://www.redalyc.org/articulo.oa?id=42932304 |