THENOYL EUROPIUM CHELATE

Return to: Main Page   ||  Non-Porous Surfaces  ||  Fluorescent Techniques  ||  Post-cyanoacrylate  ||  Ultra-violet Induced  ||  Metal Surfaces  ||  Glass Surfaces  ||  Plastic Surfaces  ||  Cartridges  ]

Chemical Name:
THENOYL EUROPIUM CHELATE
Surface Used On:
Non-porous surfaces.
Sensitive To:
Cyanoacrylate deposit.
Development Color: Method to Record: Hazard: Protective Clothing: Fume Hood Use:

Yellow fluorescence

Red filter

Eye Damage

U.V.-Eye Protection

Yes
Reagent Characteristics

Development Complete When:

Source of Error:

Incompatibilities:

Precautions:

Storage Container:

Safety:

Recommendations:


Similar Reagents



Sequential Reagents
(Not necessarily in this order.)



Abridged Reagent Sequence


Visual Examination
|
Forensic Light
|
Cyanoacrylate Fuming
|
*** T.E.C. ***
|
Ultra-violet lamp
|
R.A.Y.
|
Forensic Light

THENOYL EUROPIUM CHELATE FORMULA:
1.   STOCK SOLUTION A.

   1 g Thenoyltrifluoroacetone 
         dissolved in
200 ml of Methyl ethyl ketone.


2.   STOCK SOLUTION B.

 0.5 g 
Europium chloride hexahydrate 
        dissolved in
800 ml of distilled water.


3. THENOYL EUROPIUM CHELATE
      WORKING SOLUTION	
(Combine in the order listed.)

Combine: STOCK SOLUTIONS A & B.

Mix:
100 ml Combined stock solutions.
180 ml Methyl ethyl ketone
720 ml distilled water.
PROCEDURE OF APPLICATION
1.
Immerse or use a squirt bottle
to apply the reagent 
for about two minutes.

2. 
Allow the item to air dry.

3.
Examination under a laser or 
Forensic Light Source at the 
long-wave ultra-violet region
around 350 nm. 
View using ultra-violet 
protection goggles.

4. 
Photograph results using a 
red colored or 600(BP 35)
bandpass filter.



Ridge Detail Visualized by:

Ultra-violet light induced.


Reagent Applicabilities:

Non-Porous surfaces
Ultra-violet Induced
Post-Cyanoacrylate


Other Chemical Name(s):

Europic chloride


Working Solution Shelf-life:

Three (3) months.

Process Summary:
A fluorescent dye-stain used to enhance cyanoacrylate-developed latent prints. A fluorescent light source that will output light in the long-wave ultra-violet region (around 350 nm) is required for this process. T.E.C. reportedly produces a brighter fluorescence of ridge detail with less interfeering background luminescence than other dye stains such as Rhodamine 6G and Ardrox.
Accepted Deviations:
Immerse or use a squirt bottle to apply the reagent solution to the cyanoacrylate-fumed item. A rinse of 800 ml methanol and 200 ml distilled water can be used to remove excess dye-stain from the item.
Supporting Reference Materials:
1. Minutiae Magazine, Summer Special 1994, Issue No. 24, pg.7.
2. "Chemical Formulas and Processing Guide for Developing Latent Prints", U.S. Dept. of Justice, pg. 47-48, 1994.
3. Wilkinson, D., and Misner, A., "A Comparison of Thenoyl Europium Chleate with Ardrox and Rhodamine 6G for the Fluorescent Detection of Cyanoacrylate Prints", Jor. Forensic Identification, Vol. 44, No. 4, July/Aug 1994, pp. 387-406.

Return to: Main Page   ||  Non-Porous Surfaces  ||  Fluorescent Techniques  ||  Post-cyanoacrylate  ||  Ultra-violet Induced  ||  Metal Surfaces  ||  Glass Surfaces  ||  Plastic Surfaces  ||  Cartridges  ]