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| 2-(5-brom-2-pyridylazo)-5-diethylaminofenol (1) |
| 2-(5-Brom-2-pyridylazo)-5-diethylaminophenol (1) |
| 4-(2-pyridylazo)resorcin (1) |
| 4-(2-pyridylazo)rezorcinol (1) |
| AAS (1) |
| cobalt (1) |
| kobalt (1) |
| UV-VIS spectrophotometry (1) |
| UV-VIS spektrofotometrie (1) |
| vitamin B12 (1) |