ArticleVyncke W.
Z Lebensm Unters Forsch. 1978 Jun 28;166(5):284-6.
Sodium tripolyphosphate dips (5 min in 12% solution) extended shelf life of thornback ray wings by about 2 days, improved the appearance and eliminated weight losses. With citric acid dips (5 min in 0.5% solution) a 3 day extension of storage life was obtained but the treatment had a slight bleaching effect and caused weight losses of about 5%. Both compounds were effective in retarding the breakdown of urea with formation of ammonia in thorback ray.