BRONZE, AND ALU-~txu;.~r Baoxz~,; AXD BRASS.--'l'here have just been completed at theWaterwwn Arsenal some interesting tests of alloys, which the Government had ,.doted, with a view to getting the best possible material for the screws for the 5fieen or twenty new war ships now building. The results
Gravimetric determination of aluminium in bronzes and brasses
โ Scribed by B. Alfonsi; M. Bussi
- Publisher
- Elsevier Science
- Year
- 1960
- Tongue
- English
- Weight
- 732 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0003-2670
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โฆ Synopsis
Rl%UMl? 11 cst propod unc mdthode polarographlque dc dosage dc la tyrosme, du tryptophane et dc la phdnylalanine en pr&sence les uns des autrcs La m&ho& est spdclfique car les autres acides aminds ne g&ent pas la dCtermination amsi qu'en tdmoigne le dosage de la peptone Hoffmann-La Roche. La mdthode consistc B mtrer les acldcs amm&, puls B polarographicr le d&-i& obtenu La mbthodc cst sensible et pr&se car lcs sauts sont parfaltcmcnt bicn dessm& En jouant sur la concentratton de l'acidc, sur la stabihtb diffQrcnte dc ces substances vis&v1s de l'oxydation ct sur la formation dc pr&zrpite en pr&cncc dc mcrcurc, 11 cst possible dc doser chacun dc ccs acidcs ammb en pr&cnce dcs deux autrcs. SUMMARY A polarographlc method is described for the determination of tyrosinc, tryptophan and phcnylalanine in mlxturcs, in which the ammo acrds are fnst convcrtcd to thcrr nitro dcrrvativcs. Under smtablc condrtrons each of these animo acids can be detcrmmcd rn the prcscncc of the others. ZUSAMMENFASSUNG Es wud cinc polarographische Methode bcschricbcn zur Bestrmmung von Tyrosin, Tryptophan und Phcnylalanin m dcrcn Gcmlsch Zur Messung wcrdcn dlc Nitroderivatc verwcndct. Durch Emhaltung bestlmmtcr Bedingungcn konncn drc crnzclncn Amino&urcn m Gegcnwart dcr andercn bcstimmt werden BIBLIOGRAPHIE D. MONNIER ET Y. RUSCONI, Helv. Chtm Acta, 34 (195x) 1927 Y. RUSCONI,D MONNIERET P.-E. WENGER, HcJv.Ctwn. Acla, 34(195x) 1943. D. MONNIER ET Y. RUSCONI, AnaLChrnr.
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