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Table 1 Reproducibility of the test results on broken twill fabric

From: An improved extraction method for surface dosage of insecticides on treated textile fabrics

Sample Number of cycles
32 128 512 2048
Permethrin concentration in mg/m2 after 32 rubbing cycles Permethrin concentration in mg/m2 after 128 rubbing cycles Permethrin concentration in mg/m2 after 512 rubbing cycles Permethrin concentration in mg/m2 after 2048 rubbing cycles
1 1.9 6.2 8.7 9.5
2 1.9 6.3 8.4 8.7
3 1.9 6.4 7.9 8.7
Average value 1.9 6.3 8.3 9.0
Standard deviation 0.0 0.1 0.3 0.5
Variation coefficient (%) 0.0 1.3 4.0 4.2