A simple and rapid method for colorimetric determination of histamine in fish flesh

Food Control ◽  
2005 ◽  
Vol 16 (5) ◽  
pp. 465-472 ◽  
Author(s):  
S.B. Patange ◽  
M.K. Mukundan ◽  
K. Ashok Kumar
Keyword(s):  
Rapid Method ◽  
Colorimetric Determination ◽  
Fish Flesh

Determination of Guthion® Residues on Fruits

1963 ◽  
Vol 46 (2) ◽  
pp. 229-233
Author(s):  
William S Cox
Keyword(s):  
Rapid Method ◽  
Close Agreement ◽  
Fruits And Vegetables ◽  
Collaborative Study ◽  
Colorimetric Determination ◽  
Citrus Fruits ◽  
Upper Level

Abstract The 1962 collaborative study consisted of the colorimetric determination of Guthion residues on locally purchased apples and grapes. Each fruit was “spiked” at levels of 1 and 3 ppm. Six of eight collaborators obtained recoveries of 80—106% at the lower level, and 95-111% at the upper level. Blanks were consistently low, and duplicate results were in close agreement. The method, adopted in 1960 for coletype crops, is being recommended for adoption for non-citrus fruits. Several changes in wording are recommended to clarify and shorten the method. A rapid method, based on benzene stripping of fresh fruits and vegetables, followed by cleanup with acetonitrile-n-hexane partitioning, is recommended for collaborative study next year.

scholarly journals A SIMPLE AND RAPID METHOD FOR THE DETERMINATION OF HISTAMINE IN FISH FLESH

1960 ◽  
Vol 26 (12) ◽  
pp. 1183-1191 ◽  
Author(s):  
Toshiharu KAWABATA ◽  
Yutaka UCHIDA ◽  
Taeko AKANO
Keyword(s):  
Rapid Method ◽  
Fish Flesh

A New Simple Semimicro Method for Colorimetric Determination of Urea

1963 ◽  
Vol 9 (1) ◽  
pp. 102-108 ◽  
Author(s):  
J J Coulombe ◽  
L Favreau
Keyword(s):  
Acid Medium ◽  
Rapid Method ◽  
Room Temperature ◽  
Colorimetric Determination ◽  
Red Color ◽  
Color Complex ◽  
Blood Filtrate ◽  
Diacetyl Monoxime

Abstract A new simple and rapid method for quantitative semimicro determination of blood urea is presented. Diacetyl monoxime and thiosemicarbazide form in acid medium with urea a red color complex with a maximum adsorption at 530 mµ stable at room temperature and requiring 0.2 ml. of 1:10 blood filtrate.

Manual Determination of Minced Fish Flesh in Mixed Fillet-Minced Cod Blocks: Collaborative Study

1988 ◽  
Vol 71 (1) ◽  
pp. 38-40
Author(s):  
J Perry Lane ◽  
Robert J Learson ◽  
◽  
S Berube ◽  
N Farstad ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Rapid Method ◽  
Collaborative Study ◽  
Fish Flesh ◽  
Coefficients Of Variation ◽  
Minced Fish ◽  
Standard Deviations

Abstract A simple, rapid method for determining the amount of minced fish in mixed fillet-minced cod blocks was tested by 9 collaborators. Each collaborator first examined 2 practice blocks containing 20% mince, and then examined 6 blind duplicate samples of 5 lb cod blocks from each of 3 test lots containing, respectively, 26.25, 18.75, and 12.5% mince. The data from one of the 9 collaborators was not usable because of a malfunctioning scale. Standard deviations (SD) for the 3 lots (all 8 collaborators combined) were 1.77, 1.51, and 1.65, and coefficients of variation (CV) were 6.8, 8.9, and 16.2%, respectively. For comparison, the results of an informal collaborative study by 10 participants on 16.5 lb mixed cod blocks containing 20.1% mince were SD 2.72 and CV 0.136%. Collaborators reported no problems with the method, and statistical analysis shows the method to be sufficiently precise for this type of determination. The method has been adopted official first action for cod.

A Method for the Colorimetric Determination of β-Glucuronidase in Urine, Serum, Tissue; Assay of Enzymatic Activity in Health and Disease

1959 ◽  
Vol 36 (2) ◽  
pp. 193-201 ◽  
Author(s):  
Julius A. Goldbarg ◽  
Esteban P. Pineda ◽  
Benjamin M. Banks ◽  
Alexander M. Rutenburg
Keyword(s):  
Enzymatic Activity ◽  
Colorimetric Determination ◽  
Health And Disease ◽  
Urine Serum

Colorimetric Determination of Fluoride in Drinking Groundwater using a Polymeric Zirconium Complex of 5-(2-Carboxyphenylazo)-8-Hydroxyquinoline

2013 ◽  
Vol 12 (7) ◽  
pp. 460-465
Author(s):  
Sameer Amereih ◽  
Zaher Barghouthi ◽  
Lamees Majjiad
Keyword(s):  
Drinking Water ◽  
Detection Limit ◽  
Complex Formation ◽  
Molar Absorptivity ◽  
Colorimetric Determination ◽  
Zirconium Complex ◽  
Reliable Determination ◽  
Percentage Recovery ◽  
Quantitation Limit

A sensitive colorimetric determination of fluoride in drinking water has been developed using a polymeric zirconium complex of 5-(2-Carboxyphenylazo)-8-Hydroxyquinoline as fluoride reagents. The method allowed a reliable determination of fluoride in range of (0.0-1.5) mg L-1. The molar absorptivity of the complex formation is 7695 ± 27 L mol-1 cm-1 at 460 nm. The sensitivity, detection limit, quantitation limit, and percentage recovery for 1.0 mg L-1 fluoride for the proposed method were found to be 0.353 ± 0.013 μg mL-1, 0.1 mg L-1, 0.3 mg L-1, and 101.7 ± 4.1, respectively.

Colorimetric Determination of Amoxicillin in Pure and some Pharmaceutical Formulations Via Reaction with Potassium Permanganate as Oxidant Reagent

2019 ◽  
Vol 10 (02) ◽  
Author(s):  
Abbas Shebeeb Al-kadumi ◽  
Sahar Rihan Fadhel ◽  
Mohammed Abdullah Ahmed ◽  
Luma Amer Musa
Keyword(s):  
Potassium Permanganate ◽  
Pharmaceutical Preparations ◽  
Pharmaceutical Formulations ◽  
Atomic Emission ◽  
Basic Medium ◽  
Photometric Method ◽  
Colorimetric Determination ◽  
Spectrophotometric Methods ◽  
Label Claim

We proposed two simple, rapid, and convenient spectrophotometric methods are described for the determination of Amoxicillin in bulk and its pharmaceutical preparations. They are based on the measurement of the flame atomic emission of potassium ion (in first method) and colorimetric determination of the green colored solution for manganite ion at 610 nm formed after reaction of Amoxicillin with potassium permanganate as oxidant agent (in the second method) in basic medium. The working conditions of the methods were investigated and optimized. Beer's law plot showed a good correlation in the concentration range of 5-45 μg/ml. The detection limits and relative standared deviations were (2.573, 2.814 μg/ml) (2.137, 2.498) for the flame emission photometric method and (1.844, 2.016 μg/ml) (1.645,1.932) for colorimetric methods for capsules and suspensions respectively. The methods were successfully applied to the determination of Amoxicillin in capsules and suspensions, and the obtained results were in good agreement with the label claim. No interference was observed from the commonly encountered additives and expectancies.

A Rapid Method for Determination of Buprenorphine and Norbuprenorphine in Urine by UPLC-MS/MS

2020 ◽  
Vol 16 ◽  
Author(s):  
Aykut Kul ◽  
Murat Ozdemir ◽  
Selma Ozilhan ◽  
Olcay Sagirli
Keyword(s):  
Forensic Science ◽  
Rapid Method ◽  
Proficiency Testing ◽  
Mass Spectrometer ◽  
Illicit Market ◽  
Analysis Methods ◽  
Accuracy And Precision ◽  
Lower Limits

Background: Buprenorphine is quite common in the illicit market. Buprenorphine-containing drugs abuse is frequently encountered in patients. The analysis methods used to determine the abuse of buprenorphine and norbuprenorphine are important for forensic science. Buprenorphine is metabolized to norbuprenorphine by the liver. Objective: Therefore, the determination of buprenorphine and norbuprenorphine in urine is one of the methods to determine the abuse of buprenorphine. Methods: In this study, we have developed a precise, simple, and rapid ultra-performance liquid chromatographytandem mass spectrometer method for the determination of buprenorphine and norbuprenorphine simultaneously. Results: The developed method was validated in terms of selectivity and linearity, which was in the range of 9–1800 ng/mL for both buprenorphine and norbuprenorphine. The intra-assay and inter-assay accuracy and precision were found within acceptable limits of the EMA guideline. Lower limits of quantitation were 9 ng/mL for both buprenorphine and norbuprenorphine. Conclusion: The developed method was successfully applied for the determination of both analytes in the proficiency testing samples.

Sign in / Sign up

Export Citation Format

Share Document