Table 1 Mean melamine migration by pH and Run
From: The effects of pH on the migration of melamine from children’s bowls
N = 5 for all groups | Mean melamine migration | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Brand 1 | Brand 2 | ||||||||||
Run | pH | pH | |||||||||
3.0 | 5.0 | 7.0 | 9.0 | 11.0 | 3.0 | 5.0 | 7.0 | 9.0 | 11.0 | ||
1 | μg/L | 76.7 | 32.3 | 24.9 | 31.0 | 35.4 | 52.0 | 24.9 | 37.6 | 22.4 | 22.4 |
11.8a | 5.3 | 2.8 | 4.8 | 4.9 | 19.8 | 3.8 | 6.8 | 1.8 | 6.5 | ||
μg/cm2 | 0.100 | 0.042 | 0.033 | 0.041 | 0.046 | 0.064 | 0.031 | 0.046 | 0.028 | 0.028 | |
0.015 | 0.007 | 0.004 | 0.006 | 0.006 | 0.024 | 0.005 | 0.008 | 0.002 | 0.008 | ||
2 | μg/L | 37.4 | 22.6 | 23.3 | 32.2 | 17.5 | 18.0 | 6.1 | 6.1 | 10.1 | 11.9 |
13.3 | 7.4 | 5.8 | 9.3 | 4.6 | 9.3 | 2.0 | 2.0 | 3.7 | 5.4 | ||
μg/cm2 | 0.049 | 0.030 | 0.030 | 0.042 | 0.023 | 0.022 | 0.007 | 0.007 | 0.012 | 0.015 | |
0.017 | 0.010 | 0.008 | 0.012 | 0.006 | 0.011 | 0.002 | 0.002 | 0.005 | 0.007 | ||
3 | μg/L | 31.8 | 8.4 | 8.3 | 5.7 | 10.3 | 10.7 | 7.7 | 8.7 | <4.1 | 11.8 |
9.2 | 2.8 | 2.7 | 1.5 | 4.2 | 6.6 | 2.2 | 4.6 | 0.0 | 4.8 | ||
μg/cm2 | 0.042 | 0.011 | 0.011 | 0.007 | 0.014 | 0.013 | 0.010 | 0.011 | <0.005 | 0.015 | |
0.012 | 0.004 | 0.004 | 0.002 | 0.005 | 0.008 | 0.003 | 0.006 | 0.000 | 0.006 | ||
4 | μg/L | 23.5 | 7.2 | 15.5 | 17.7 | 17.8 | 10.7 | 12.9 | 10.4 | 7.0 | 7.9 |
9.4 | 3.1 | 1.3 | 3.0 | 1.2 | 4.5 | 3.8 | 3.9 | 2.9 | 3.6 | ||
μg/cm2 | 0.031 | 0.009 | 0.020 | 0.023 | 0.023 | 0.013 | 0.016 | 0.013 | 0.009 | 0.011 | |
0.012 | 0.004 | 0.002 | 0.004 | 0.002 | 0.006 | 0.005 | 0.005 | 0.004 | 0.004 | ||
5 | μg/L | 26.9 | 6.2 | 10.2 | <4.1 | <4.1 | 8.7 | <4.1 | <4.1 | <4.1 | 8.4 |
6.3 | 2.1 | 2.5 | 0.00 | 0.00 | 4.6 | 0.00 | 0.00 | 0.00 | 2.6 | ||
μg/cm2 | 0.035 | 0.008 | 0.013 | <0.005 | <0.005 | 0.011 | <0.005 | <0.005 | <0.005 | 0.010 | |
0.008 | 0.003 | 0.003 | 0.000 | 0.000 | 0.006 | 0.000 | 0.000 | 0.000 | 0.003 | ||
10 | μg/L | 30.3 | <4.1 | <4.1 | <4.1 | <4.1 | 11.3 | <4.1 | 6.7 | <4.1 | <4.1 |
8.3 | 0.00 | 0.00 | 0.00 | 0.00 | 4.6 | 0.00 | 2.6 | 0.00 | 0.00 | ||
μg/cm2 | 0.040 | <0.005 | <0.005 | <0.005 | <0.005 | 0.014 | <0.005 | 0.008 | <0.005 | <0.005 | |
0.011 | 0.000 | 0.000 | 0.000 | 0.000 | 0.006 | 0.000 | 0.003 | 0.000 | 0.000 | ||