Rapid Quality Control Test Kits

Instructions

Place approximately 1⁄2 teaspoon (2cc) of well mixed, cooked, ground soybeans or soybean meal in the small plastic dish provided; cover generously with SOY-CHEK solution; swirl gently to spread and wet the sample evenly; let stand on a white surface without agitation for 5 minutes; read the reaction according to the following scale:

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: Surface appears 50% or more covered with active red or pink particles. Estimated pH rise = 0.3-0.5.

3.0 Moderately Active: Surface 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.

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.

CAUTION: Keep SOY-CHEK at less than 80F (27C) for best results. Refrigerate (do not freeze) for long term storage. SOY-CHEK will turn red-purple when no longer usable. FOR TESTING PURPOSES ONLY. NOT RESPONSIBLE FOR MISUSE OR MISINTERPRETATION.

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

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