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Table 2 Intra- and inter-day analysis ( n = 6)

From: Validated TLC-densitometry method for the simultaneous analysis of pyrethroid insecticides in agricultural and domestic products

Standard

Intra-day precision

Inter-day precision

Amount fractioned (ng)

% recoverya)

% RSD

Amount fractioned (ng)

% recoverya)

% RSD

1sttime

2ndtime

Day1

Day2

Cis-permethrin

300

105.7

105.3

0.28

300

105

104

0.766

600

97

96.74

0.2

600

97

97

0.0

1200

99.73

99.57

0.1

1200

99.7

99.6

0.1

Trans-permethrin

300

103.5

103.4

0.097

300

103

102

0.78

600

98.33

97.44

0.61

600

98.3

98.2

0.1

1200

100.2

100.4

0.199

1200

100

100

0.0

Esbiothrin

300

102.5

102.1

0.29

300

102

102

0.0

600

96.88

96.6

0.2

600

96.8

95.3

1.15

1200

99.85

99.17

0.5

1200

99.8

99.4

0.3

Alpha-cypermethrin

300

97.87

99.81

1.42

300

97.9

97.7

0.1

600

100.5

100

0.299

600

100

101

0.697

1200

99.9

99.9

0.0

1200

99.9

99.4

0.3

  1. a)Values are mean of n = 6.