geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Identical flow injection spectrophotometric manifold for determination of protein, phosphorus, calcium, chloride, copper, manganese, iron, and zinc in feeds or premixes


, : Identical flow injection spectrophotometric manifold for determination of protein, phosphorus, calcium, chloride, copper, manganese, iron, and zinc in feeds or premixes. Journal of Aoac International 84(4): 1179-1186

A simple procedure using an identical manifold was developed for determination of nitrogen (protein) phosphorus, calcium, chloride, copper, manganese, iron, and zinc in feeds and feedstuffs. By changing appropriate reagents and detection wavelength, these 8 elements were determined successively with a simple identical double-line flow injection (FI) manifold. FI spectrophotometric determinations were made by the blue indophenol reaction for ammonium, the molybdenum blue method for phosphate, the cresolphthalein complexone procedure for calcium, and the mercuric thiocyanate procedure for chloride. The chromogenic reagents for copper, iron, manganese, and zinc determination were bis(cyclohexanone)oxalydihydrazone (Cuprizone), 1,10-phenanthroline, formaldoxime, and xylenol orange, respectively. Sample digestion catalyst, FI manifold, and some chemical parameters were optimized. The proposed procedure had a sampling rate of 90/h for each analyte. The determination ranges (mg/L) were 10-60 for N, 1-15 for P and Ca, 5-40 for CI, and 0.5-15 for Cu, Fe, Mn, and Zn, respectively. Results of the analyses of animal feed and feedstuff samples by this procedure did not differ significantly from those obtained by proven manual methods.

US$29.90

PMID: 11501921


Other references

Kralik, S.F.; Haider, K.M.; Lobo, R.R.; Supakul, N.; Calloni, S.F.; Soares, B.P., 2017: Orbital infantile hemangioma and rhabdomyosarcoma in children: differentiation using diffusion-weighted magnetic resonance imaging. To evaluate differences in magnetic resonance imaging (MRI) appearance between infantile hemangiomas and rhabdomyosarcomas of the orbit in pediatric patients using diffusion-weighted imaging. A multicenter retrospective review of MRIs of pediatric...

Dolei, G., 1961: Tuberculosis in students admitted to the Sassari sanatorium during the 1951-1960 decade. Archivio di Tisiologia E Delle Malattie Dell'apparato Respiratorio 16: 916-919

Richardson, J.; Lundegaard, P.Rengtved.; Reynolds, N.L.; Dorin, J.R.; Porteous, D.J.; Jackson, I.J.; Patton, E.Elizabeth., 2009: mc1r Pathway regulation of zebrafish melanosome dispersion. Zebrafish rapidly alter their pigmentation in response to environmental changes. For black melanocytes, this change is due to aggregation or dispersion of melanin in the cell. Dispersion and aggregation are controlled by intracellular cyclic adeno...

Schaub, Samuel, 1950: Revision de quelques Carnassiers villafranchiens du Niveau des Etouaires. Redescription of Acinonyx pardinensis, with a restoration of the articulated skeleton, Felis arvernensis. Pannonictis ardea and Baranogale cf. helbingi (the Zorilla fossilis of Bravard).

Paavonen, J., 1991: General sexually transmitted diseases. This review discusses current trends in sexually transmitted diseases. Topics include treatment and prevention of syphilis and gonorrhea, as well as the association of sexually transmitted diseases with sexual assault. Also discussed are the vario...

Kachanoski, R.G.; Rolston, D.E.; Jong, E. de, 1985: Spatial and spectral relationships of soil properties and microtopography: I. Density and thickness of A horizon. The effects of microtopography and an intertill stratigraphic sand-gravel layer on the spatial variability of A horizon thickness, density, and mass are examined using standard, spatial, and spectral statistical methods. Soil cores (76 mm diam) we...

Flaks, A.; Flaks, B., 1978: Histopathology of the rat liver following a single autoprotective dose of 3'-methyl-4-dimethylaminoazobenzene. Male inbred Leeds strain rats were given single intragastric doses of 1200 mg/kg of 3'-methyl-4-dimethylaminoazobenzene, autoprotective against liver necrosis and then sacrificed at intervals up to 14 months. About 40 per cent of the animals...

Medrano J.F.; Gall G.A.E., 1975: Selection for oxygen consumption in tribolium castaneum. Journal of Animal Science 41(1): 253

Prigogine, A., 1953: Contribu-tion a l'etude de la Faune ornitho-logique de la region a Pouest du lacEdouard. Ann Mus Congo Belg 8vo, 24: 1-117

Leshchuk F.A., 1965: Use of the apparatus of controlled directional pickup for recording deep waves. Akad: ukrain. ssr inst. geofiziki, geofiz. sbornik. 2(13); Pages 52-55. 1965.