TY - JOUR
T1 - The role of sulphur dioxide and nitrate on detinning of canned grapefruit juice
AU - SAGUY, I.
AU - MANNHEIM, C. H.
AU - PASSY, N.
PY - 1973/6
Y1 - 1973/6
N2 - In this work, the effect of the corrosion accelerating substances sulphur dioxide and nitrate, which may be present in foods as residues was investigated. The amount of dissolved tin and iron were taken as the corrosion criteria. Sulphur dioxide was found to act as a corrosion accelerator, in an acid medium of grapefruit juice, with even 1 ppm of SO2 having a highly significant effect on corrosion. Using statistical analysis, a mechanism describing the corrosion as a function of time was found. The process was divided into two main stages, namely, a first fast stage lasting for about 7 days described by the polynomial: γ=A0+A1X‐A2X2+A3X3 and a second stage described by the linear equation γ=a+bX. Nitrate also acted as a corrosion accelerator. The threshold value of nitrate for tin dissolution in cans with a 3 mm headspace was 6 ppm while with a 30 mm headspace it was 2 ppm. For iron dissolution the threshold was 6 ppm at both headspace levels. The corrosion mechanism for nitrate and iron was similar to the one mentioned above. A linear relationship between dissolved tin and iron in the presence of nitrates was found.
AB - In this work, the effect of the corrosion accelerating substances sulphur dioxide and nitrate, which may be present in foods as residues was investigated. The amount of dissolved tin and iron were taken as the corrosion criteria. Sulphur dioxide was found to act as a corrosion accelerator, in an acid medium of grapefruit juice, with even 1 ppm of SO2 having a highly significant effect on corrosion. Using statistical analysis, a mechanism describing the corrosion as a function of time was found. The process was divided into two main stages, namely, a first fast stage lasting for about 7 days described by the polynomial: γ=A0+A1X‐A2X2+A3X3 and a second stage described by the linear equation γ=a+bX. Nitrate also acted as a corrosion accelerator. The threshold value of nitrate for tin dissolution in cans with a 3 mm headspace was 6 ppm while with a 30 mm headspace it was 2 ppm. For iron dissolution the threshold was 6 ppm at both headspace levels. The corrosion mechanism for nitrate and iron was similar to the one mentioned above. A linear relationship between dissolved tin and iron in the presence of nitrates was found.
UR - http://www.scopus.com/inward/record.url?scp=85005732426&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2621.1973.tb01700.x
DO - 10.1111/j.1365-2621.1973.tb01700.x
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AN - SCOPUS:85005732426
SN - 0950-5423
VL - 8
SP - 147
EP - 155
JO - International Journal of Food Science and Technology
JF - International Journal of Food Science and Technology
IS - 2
ER -