Marquis Test

Test 3 Marquis Test Mix 1 volume of formaldehyde solution with 9 volumes of sulfuric acid. Add a drop of the reagent to the primaquine phosphate sample on a white tile an orange color is produced [2]. 

Marquis Test Prepare the reagent by mixing 1 volume of formaldehyde with 9 volumes of sulfuric acid. When dipyridamole is reacted with this reagent, the resulting solution has an orange color. 

Marquis Test (p. 139). Many basic drugs produce colours with diis reagent. It is a good test for opiates, stimulants, antihistamines, and pheno-thiazines. 

In addition, many odier tests described on pp. 129-147 may be used for pesticides, especially Aromat-icity (Method 2), Diphenylamine Test, Fujiwara Test, Koppanyi-Zwikker Test, Liebermann s Test, Marquis Test, Methanolic Potassium Hydroxide, Palladiiun Chloride, Sodium Nihoprusside (Method 2), md Sulphuric Acid. Certain pesticides are included in die Tables of colours, where appropriate. A test for the presence of cholinesterase inhibitors... 

Certain of the tests described here may be carried out by the micro technique (E. G. C. Clarke and M. Williams, J. Pharm. Pharmac., 1955, 7, 255-262). This applies particularly to Mandelin s Test, Marquis Test, and the Sulphuric Acid test. Information on the direct application of colour tests to urine, blood, and stomach contents can be found under Hospital Toxicology and Drug Abuse Screening (p. 4). Where an extraction procedure has been carried out with the production of acidic and basic fractions (see p. 11), the tests below may be applied to the evaporated extracts. 

Forrest Reagent FPN Reagent Liebermann s Test Mandelin s Test Marquis Test Nessler s Reagent Sulphuric Acid... 

Note. This reagent is not the same as that used in the Marquis Test. 

Colour Tests. Formaldehyde-Sulphuric Acid—blue-violet Forrest Reagent—red FPN Reagent—brown-orange Lieber-mann s Test—brown Mandelin s Test—green—> red Marquis Test—yellow-green— red. 

Colour Test. Marquis Test—blue-grey— yellow-brown. 

Colour Tests. Ammoniacal Silver Nitrate—red-brown/red-brown Ferric Chloride—green Folin-Ciocalteu Reagent— blue Marquis Test—orange—> violet Methanolic Potassium Hydroxide—pink-orange—> brown Nessler s Reagent—black Palladium Chloride—orange —> brown Potassium Dichromate (Method 1)—green— brown. 

Colour Tests. Liebermann s Test—red Mandelin s Test—red Marquis Test—violet. 

Colour Tests. Mandelin s Test—blue-violet Marquis Test— green-brown. 

Colour Tests. Marquis Test—yellow Sulphuric Acid—yellow. 

Colour Tests. Diazotisation—red Marquis Test—orange (slow). 

Colour Tests. Ferric Chloride—blue Liebermann s Test— black Marquis Test—violet- black Methanolic Potassium Hydroxide—green- red Kessler s Reagent—black. 

Colour Tests. Cyanogen Bromide—pink Marquis Test—violet. 

Colour Tests. The following tests are performed on benzilonium nitrate (see page 128) Liebermann s Test—brown Marquis Test—orange green blue Sulphuric Acid—orange. 

Colour Tests. Mandolin s Test—blue-green Marquis Test—red-violet. 

---