Sugita T, Ishiwata H, Yoshihira K
National Institute of Hygienic Sciences, Kamiyoga 1-chome, Setagaya-ku, Tokyo, Japan.
Food Addit Contam. 1990 Jan-Feb;7(1):21-7. doi: 10.1080/02652039009373815.
The relationship between the concentrations of formaldehyde and melamine released into 4% acetic acid from dishes and bowls made of melamine-formaldehyde resin was determined. The average concentrations in the migration solution after the sample had been treated at 60, 80, and 95 degrees C for 30 min with 4% acetic acid were 0.0 +/- 0.1, 0.5 +/- 0.4 and 3.0 +/- 2.2 ppm, respectively for formaldehyde and 0.04 +/- 0.07, 0.21 +/- 0.20 and 1.19 +/- 1.18 ppm, respectively for melamine. The correlation between the concentrations of formaldehyde and melamine released at 95 degrees C was y=0.4858x-0.2728 (r=0.8860), where y is melamine concentration (ppm), x is formaldehyde concentration (ppm) and r is the correlation coefficient. The molar concentration ratios of formaldehyde to melamine (F/M ratio) were 15.4 +/- 11.6 at 80 degrees C and 14.9 +/- 10.1 at 95 degrees C. Hence the release of both migrants was affected by temperature but the F/M ratio was not affected. The release of both compounds was was increased on repetition of the migration test at 95 degrees C but their concentrations remained constant after the tenth and seventeenth repetitions of the treatment. During this period, the F/M ratio decreased according to the equation 1n y=-1.4344 1n x+3.7814 (r=-0.9984) for a sample before the tenth repetition of the treatment and remained between 1.7 and 1.9 after the twelfth repetition, where y is the F/M ratio and x is the number of repetitions of the treatment.
测定了三聚氰胺 - 甲醛树脂制成的碗碟释放到4%乙酸中的甲醛和三聚氰胺浓度之间的关系。样品在60、80和95℃下用4%乙酸处理30分钟后，迁移溶液中甲醛的平均浓度分别为0.0±0.1、0.5±0.4和3.0±2.2 ppm，三聚氰胺的平均浓度分别为0.04±0.07、0.21±0.20和1.19±1.18 ppm。95℃下释放的甲醛和三聚氰胺浓度之间的相关性为y = 0.4858x - 0.2728（r = 0.8860），其中y是三聚氰胺浓度（ppm），x是甲醛浓度（ppm），r是相关系数。80℃时甲醛与三聚氰胺的摩尔浓度比（F/M比）为15.4±11.6，95℃时为14.9±10.1。因此，两种迁移物的释放都受温度影响，但F/M比不受影响。在95℃重复迁移试验时，两种化合物的释放量增加，但在处理第十次和第十七次后其浓度保持恒定。在此期间，对于处理第十次之前的样品，F/M比根据方程1n y = -1.4344 1n x + 3.7814（r = -0.9984）下降，处理第十二次后保持在1.7至1.9之间，其中y是F/M比，x是处理重复次数。
