Spectrophotometric Determination of Raceophenidol in Feed at Very Low Levels

1968 ◽  
Vol 51 (4) ◽  
pp. 752-755
Author(s):  
Edward L Pratt ◽  
Morris E Auerbach
Keyword(s):  
Spectrophotometric Determination ◽  
Growth Promotion ◽  
Ultraviolet Spectrum ◽  
Average Value ◽  
Collaborative Studies ◽  
Low Levels ◽  
Concentration Levels

Abstract Raceophenidol in feed at concentration levels intended for growth promotion of poultry can be estimated by a curvature inversion measurement related to the ultraviolet spectrum of derived p-methylsulfonylbenzaldehyde. The drug can be accurately measured at the 0.0005% level. Collaborative studies on the method showed an average value of 94 ± 10% of claim. The method is recommended for adoption as official, first action.

Infrared, Ultraviolet, and Visible Spectrophotometric Determination of Imidan in Animal Dips and Sprays

1969 ◽  
Vol 52 (5) ◽  
pp. 1017-1026
Author(s):  
Fred P Czech ◽  
Marvin D Mack ◽  
George Evans
Keyword(s):  
Spectrophotometric Determination ◽  
Rapid Analysis ◽  
The Other ◽  
Spectral Energy ◽  
Wettable Powder ◽  
Low Levels ◽  
Colorimetric Methods

Abstract Procedures utilizing certain regions of spectral energy for the analysis of Imidan in emulsifiable and wettable powder concentrates, aqueous livestock dips, spray dips, and sprays are presented and compared. The UV method is recommended for rapid analysis of proprietary concentrates. IR and colorimetric methods are advised for filth-laden animal dips and sprays. The IR method can be genrerally applied, is entirely specific for Imidan, and is quite precise. The other procedures are particularly useful for determination of low levels of Imidan.

Catalytic spectrophotometric determination of trace Mo(vi) in milk-based beverages in the presence of bromophenol blue and H2O2 using SDS as a sensitizer

2016 ◽  
Vol 8 (33) ◽  
pp. 6284-6292
Author(s):  
Nuket Kartal Temel ◽  
Ramazan Gürkan
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Spectrophotometric Determination ◽  
Spectrophotometric Method ◽  
Low Cost ◽  
Sodium Dodecyl ◽  
Bromophenol Blue ◽  
Dodecyl Sulfate ◽  
Low Levels

A simple and low-cost catalytic spectrophotometric method using sodium dodecyl sulfate (SDS) as a sensitivity-improving surfactant to detect low levels of Mo(vi) in beverage matrices was developed.

Atomic Absorption Spectrophotometric Determination of Mercury in Mercury≃Containing Drugs: Collaborative Study

1983 ◽  
Vol 66 (5) ◽  
pp. 1203-1206
Author(s):  
Walter Holak ◽  
◽  
R Baltz ◽  
L Elliott ◽  
E McGary ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Spectrophotometric Determination ◽  
Collaborative Study ◽  
Ophthalmic Solution ◽  
Mean Value ◽  
Antiseptic Solution ◽  
Aas Method ◽  
Low Levels

Abstract An atomic absorption spectrophotometric (AAS) method applicable to a wide variety of mercurycontaining drugs has been developed and subjected to a collaborative study. Samples were digested with a water-HCl-HN03 (4 + 3 + 1) mixture, and the mercury was determined in solution by AAS. High levels of mercury were measured with a conventional air-acetylene flame, whereas low levels were measured by the flameless technique. Each of 7 collaborators received duplicate synthetic samples of a tincture, an ophthalmic solution, and an antiseptic solution, and duplicate commercial samples of an ointment and an injectable. The overall mean value found by collaborators for mercury in these samples was 100.13%. The corresponding overall repeatability SD (CV, %) and reproducibility SD (CV, %) values were 2.18 (2.18) and 3.38 (3.38), respectively. The proposed AAS method has been adopted official first action.

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