CHESAPEAKE BAY DIVISION - IAI
  • Home
  • About Us
  • Membership
  • Conferences
  • Seminars
  • Webinars
  • Students
  • Resources
  • Vendors
  • Job Opportunities/Training
  • Interactive Chemical Reagent Program
  • ACE-V Methodology

Thenoyl Europium Chelate

Back to Start

Development Color:
Picture
Vertical Divider
Method to Record:
Picture
Picture
Vertical Divider
Hazard:
Picture
Picture
Vertical Divider
Protective Clothing: 
Picture
Vertical Divider
 Fume Hood Use:
Picture

Formula
Procedure of Application
Development Complete When
Source of Error
Incompatibilities
Precautions
Storage Container
Safety
Recommendations
Similar Reagent
Sequential Reagent
Formula
Stock Solution A:
1 g Thenoyltrifluoroacetone dissolved in 200 ml of Methyl ethyl ketone.

Stock Solution B:
0.5 g Europium chloride hexahydrate dissolved in 800 ml of distilled water.

Thenoyl Europium Chelate Working Solution: (Combine in the order listed.)

Combine: Stock solution 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.




​
​
Development Complete When
The cyanoacrylate has absorbed the dye stain.







​

​



​
Source of Error
Surfaces that absorb too much dye stain will fluoresce too brilliantly to be effective for photography.






​





​
Incompatibilities
Items that inherently fluoresce in the ultra-violet region will interfere with the dye stain fluorescence.









​


​
Precautions
Secure the storage bottles tightly to prevent solution loss due to evaporation.

Avoid excess build-up of cyanoacrylate, since this may result in ridge detail depicting little contrast to the strongly fluorescent surface.





​


​
Storage Container
Tightly-stoppered dark glass or plastic bottles.







​





​
Safety
Use ultra-violet light eyewear protection.

Fume hood use is required when preparing and applying this reagent. 




​


​


​
Recommendations
The recommended procedure of application is to immerse the item in a tray of the dye.

If applying via squirt bottle, keep applying the reagent until maximum contrast is viewed under Ultra-violet light.


​


​
​


​
Similar Reagent
  • Ardrox
  • Basic Yellow 40
  • Basic Red 28
  • Liqui-Drox
  • M.B.D.
  • Nile Red
  • Rhodamine 6G
  • Safranin O



​
​
​
Sequential Reagent
​Not Necessarily in this Order:​
  • M.B.D.
  • M.R.M. 10
  • R.A.M.
  • R.A.Y.






​


​
Vertical Divider
Chemical Name
Thenoyl Europium Chelate
​Surface Used On
Non-Porous Surfaces
​
Sensitive To
Cyanoacrylate Deposit
​
Abridged Reagent Sequence
  1. Visual Examination
  2. Forensic Light
  3. Cyanoacrylate Fuming
  4. T.E.C.
  5. Ultra-Violet Lamp​
  6. R.A.Y.
  7. Forensic LIght
Vertical Divider
Ridge Detail Visualized by:
Ultra-Violet Light induced
​
Reagent Applicabilities:
Non-Porous Surfaces
Fluorescent Technique
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. 

Address
Chesapeake Bay Division - International Association for Identification   

P.O. Box 71804, 
Henrico, VA 23255
Email
cbdiaisec@gmail.com
Technical Problems
Problem with website?

Please contact:
Da-il Kim, Webmaster
cbdiaiwebm@gmail.com
Social
Copyright © Company. All Rights Reserved.
  • Home
  • About Us
  • Membership
  • Conferences
  • Seminars
  • Webinars
  • Students
  • Resources
  • Vendors
  • Job Opportunities/Training
  • Interactive Chemical Reagent Program
  • ACE-V Methodology