The H?S contents of cooked whole egg and albumen mixtures were highest from samples with pH around 7.5 and 7.0, respectively. The highest HzS content was obtained for the cooked mixture containing a natural yolk to albumen ratio. The alteration of yolk to albumen ratio resulted in an alteration of pH for the mixtures and decreased the HzS content of the cooked products. The addition of acetic acid, citric acid, NazEDTA, and polyphosphates at 0.1% or malic acid, monosodium phosphate, sorbic acid, succinic acid, and tartaric acid at 0.5% to the raw mixture reduced the H2S content of the cooked samples.
The effect of acidulants on the total nitrogen, pH, gelatin, calcium, and phosphorous contents of chicken broth was investigated. Acidulants used included: ascorbic, acetic, citric, lactic, and phosphoric acids. All acidulants at a 0.50% level increased (P<0.05) the calcium and phosphorous contents of the broth prepared from broiler breast frames. The highest calcium and phosphorous contents were produced in chicken broths prepared with 0.50% phosphoric acid, followed by citric, lactic, acetic and ascorbic acids. Phosphoric acid‐treated broth showed the highest nitrogen and gelatin contents, followed by lactic, citric, acetic, and ascorbic acids, in that order. As phosphoric acid concentration increased from 0 to 0.05%, the total nitrogen and gelatin contents of the broth decreased. However, phosphoric acid, at a concentration as low as 0.025%, increased (P<0.05) calcium and phosphorous extraction. Results indicated that acidulants could be used for the processing of high calcium and phosphorous chicken broth from broiler breast frames.
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