CAUTION: As a contractor you do not charge your customers sales tax on the total amount of the contract. It is not lawful to charge tax on the tax you have already paid. In the above example, had Hammertime charged a total of $2,130 for the job ($2,000 X .065 tax), the $130 tax must be remitted. The amount of sales tax collected from the customer is the amount that must be remitted to KDOR.
Ninhydin is a chemical that reacts with the aminio acids found in fingerprints. When the chemical contacts the amino acids, the combination of the two turns a bright purple color.The coloring is known as Ruhemannâs purple, named after the man who discovered ninhydrin, Siegfried Ruhemann.inhydrin comes in pre-mixed aerosol cans and, in a chrystal form. When using the chrystals, detectives and crime scene investigators must mix the ninhydrin with a carrier, such as acetone â the same chemical thatâs found in fingernail polish remover â or alcohol. The mix is then placed in a spray bottle for use.
These include fluorescamine, dansyl chloride, dabsyl chloride, etc., used in the detection of trace amounts of amino acids at the nanogram level. In the quantitative estimation of amino acid using Ninhydrin reagent, the absorbance of the Ruhemann's purple formed by the reaction at 570nm is measured. For imino acids, the absorbtion happens at 440nm.