Rapid Quality Control Test Kits

Reactions

Scale Activity Level Description Photo of reaction

SOY-CHEK Scale Activity Level Description Photo Reaction
1.0
Very Active
Approximately 75% or more of the total surface area covered with active red or pink particles.

Estimated pH rise = 2.0.
2.0
Active
Appears 50% or more covered with active red or pink particles.

Estimated pH rise = 0.3 – 0.5.
3.0
Moderately Active
Appears 25% or more covered with active red or pink particles.

Estimated pH rise = 0.1 = 0.25.
4.0
Slightly Active
A few scattered red or pink particles (approx. 5 – 10).

Estimated pH rise = 0.05 – 0.1.
(light pink particles may be difficult to see on this photo)
4.5
Trace Activity
1 to 5 active red or pink particles.

Estimated pH rise = 0.02 – 0.05.
Point at which most digestive inhibitors have been destroyed and the protein amino acids are most available; preferred soybean meal reaction point.
5.0
Not Active
No visible red or pink-colored particles after 5 minutes (10 minutes for full-fat samples).

Estimated pH rise = 0.0.
6.0
Fully Cooked
No red or pink-colored particles after an additional 25 minutes of reaction time.

Estimated pH rise = 0.0.
NOTE: Once all trace urease activity is destroyed, overcooking may occur.

IMPORTANT: Full-fat soybean samples must be approximately the same particle size as soybean meal (100% through #10; 40-60% through #20 sieve) and must remain submerged in SOY-CHEK for the correct reaction and pH rise estimates. Estimated pH rise ranges are accurate, but not guaranteed due to the subjective nature of interpretation of the test.

NOTE: Make sure that you cover the soybean material generously with the SOY-CHEK liquid. Some of the liquid has been drained from the photos above to reduce the glare. Your samples and results may vary from the photos above; colors will vary with different web browsers, computer monitors and printers and also with different soy products used.

LSB Products | 731 McCall Road | Manhattan, KS 66502 | T: 785.537.9773 | F: 785.537.1800 | lsbproducts@lsbproducts.com

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