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Table 2 Residues of five pesticides (mg kg− 1) in samples during Chinese steamed bun and bread processing (n = 5)

From: Effect of Chinese steamed bun and bread processing on pesticide residues in wheat flour

Treatment

Sample

Pesticide (mean ± SD)

Triadimefon

Imidacloprid

Fenitrothion

Chlorpyrifos-methyl

Chlorpyrifos

Chinese steamed bun processing

Spiked wheat flour

3.01a ± 0.067

3.26a ± 0.053

3.10a ± 0.055

2.93a ± 0.030

2.77a ± 0.058

Mixed dough

1.63b ± 0.058

1.93b ± 0.116

1.88b ± 0.034

1.96b ± 0.043

1.78b ± 0.014

Fermented dough

1.47bc ± 0.026

1.76bc ± 0.037

1.62c ± 0.048

1.61c ± 0.039

1.69bc ± 0.045

Rested dough

1.40c ± 0.058

1.71bc ± 0.017

1.56c ± 0.040

1.60c ± 0.040

1.66bc ± 0.051

Chinese steamed bun crust

2.13d ± 0.021

1.80bc ± 0.007

1.14d ± 0.060

0.99d ± 0.114

1.60c ± 0.048

Chinese steamed bun crumb

1.34c ± 0.019

1.62c ± 0.061

1.21d ± 0.064

1.09d ± 0.029

1.59c ± 0.035

Bread processing

Spiked wheat flour

3.01a ± 0.067

3.26a ± 0.053

3.10a ± 0.055

2.93a ± 0.030

2.77a ± 0.058

Mixed dough

1.65b ± 0.086

1.82b ± 0.010

1.67b ± 0.064

1.74b ± 0.030

1.64b ± 0.027

Fermented dough

1.28c ± 0.074

1.65bc ± 0.034

1.63b ± 0.075

1.58c ± 0.024

1.50bc ± 0.053

Rested dough

1.26c ± 0.140

1.51c ± 0.063

1.57b ± 0.073

1.52c ± 0.012

1.44cd ± 0.006

Bread crust

2.08d ± 0.024

2.77d ± 0.007

0.36c ± 0.067

0.31d ± 0.095

1.40cd ± 0.081

Bread crumb

1.44bc ± 0.063

1.46c ± 0.124

0.90d ± 0.090

0.82e ± 0.126

1.31d ± 0.068

  1. a-e: Values within the same column in Chinese steamed bun and bread production with different letters are significantly different (p < 0.05)