Search results
Results from the WOW.Com Content Network
Ninhydrin (2,2-dihydroxyindane-1,3-dione) is an organic compound with the formula C 6 H 4 (CO) 2 C(OH) 2. It is used to detect ammonia and amines . Upon reaction with these amines, ninhydrin gets converted into deep blue or purple derivatives, which are called Ruhemann's purple.
Dragendorff's reagent is prepared by mixing a concentrated solution of potassium iodide with a solution of bismuth subnitrate in a diluted acid (acetic acid or tartaric acid, hydrochloric acid or sulfuric acid is rarely being used) as a low pH is mandatory for this reagent. [2] The formation is as follows:
Indane-1,2,3-trione is the organic compound with the formula C 6 H 4 (CO) 3.The compound is the dehydrated derivative of C 6 H 4 (CO) 2 C(OH) 2, known as ninhydrin, which is used to reveal fingerprints.
The Bradford assay uses the spectral properties of Coomassie brilliant blue G-250 to estimate the amount of protein in a solution. [19] A protein sample is added to a solution of the dye in phosphoric acid and ethanol. Under the acid conditions the dye is normally a brownish colour but on binding to the protein the blue form of the dye is produced.
Documents that have been subjected to high levels of humidity will not generally retain indentations. As a result, other forensic examinations involving the wetting of a document, such as fingerprint development using a ninhydrin solution, should not be done until after examination for indentations. [14] Preparation
The color intensity of the resulting solution is then measured by a colorimeter and checked against a calibration curve to determine the nitrite ion concentration. [ 4 ] To analyze nitrate concentrations quantitatively, the sample is first passed through a copper-cadmium column to reduce the nitrate ions quantitatively to nitrite ions, and the ...
Training and Techniques for Meal Prep. Invest in caregiver training programs that specifically focus on meal preparation for dementia patients.These programs often feature demonstrations on ...
Hydrindantin is an organic chemical thought to be involved with the ninhydrin test for amines. [2] References This page was last edited ...