Oznaczanie zawartosci nie zwiazanego formaldehydu w oslonkach bialkowych metoda kolorymetryczna z kwasem chromotropowym

Zbadano 1964 próbek osłonek białkowych pobieranych z obrotu. Stwierdzono, że w około 40% próbek zawartość formaldehydu przekracza dopuszczalną normę 1000 mg/kg, a 90% badanych osłonek mieści się poniżej 1800 mg/kg.

In the period 1989-1991 in a control of health quality of packing material and utility objects in contact with food 1964 samples of protein coverings for processed food were analysed, determining the content of formaldehyde, lead, arsenic and copper according to the requirements of Production Standard ZN-76/MPSS-M-19-149. It was found that in about 40% of covering samples formaldehyde level exceeded the acceptable level of 1000 mg/kg. In about 90% of the samples the level of formaldehyde was below 1800 mg/kg. In 14% of the samples the lead level was increased. Arsenic and copper were within normal range in most analysed coverings.