Summary of DF1 Immunoassay Protocol
Last Revised: 9/3/98
 
1.
Place the anti-Dioxin antibody coated tubes in rack and label.  
2.
Rinse tubes once by filling each tube with reagent grade or bottled distilled water. Dump water out and tap inverted tubes on absorbent material to remove excess water.  
3.
Add 0.5 mL of reagent grade or bottled distilled water to each tube using Repeater Pipettor.
 
4.
Add 50 µL of 100 ppm Triton X-100 in methanol to each tube and mix.
 
5.
Add 10 µL of negative control, standard or prepared sample directly to liquid in each tube. Mix and let stand 2 hours (acceptable performance) or overnight (12 to 24 hours; best performance).
 
6.
Remove tube contents and wash 4 times using reagent grade or bottled distilled water plus 0.01% Triton X-100, 1.0 mL per tube for each wash. Tap inverted tubes on absorbent material to remove excess water.
 
7.
Add 0.5 mL of Competitor-HRP Conjugate to each tube using Repeater Pipettor. Mix and let stand 15 minutes.
 
8.
Remove tube contents and wash 4 times using 1.0 mL reagent grade or bottled distilled water per tube for each wash. Tap inverted tubes on absorbent material to remove excess water.
 
9.
Add 0.5 mL of HRP Substrate to each tube using Repeater Pipettor. Mix and let stand 30 minutes.
 
10.
Add 0.5 mL of Stop to each tube using Repeater Pipettor. Wipe outside dry and read OD within 30 minutes.
 

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