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Table 1 Recovery and precision values for permethrin determination in spiked samples and treated wood then analysed using developed chemical sensors and HPLC

From: Reaction of 2,6-dichloroquinone-4-chloroimide (Gibbs reagent) with permethrin – an optical sensor for rapid detection of permethrin in treated wood

Method

Wood (spiked samples)

Treated wood

 

Type of sample

Recovery

Precision

Type of sample

Recovery

Precision

   

RSD (%)

  

RSD (%)

Chemical Sensors

Sample A*

130

5.2

Kempas**

126

6.2

Sample B*

125

6.8

   

Sample C*

120

5.3

   

Sample A*

129

6.2

Rubberwood***

124

5.2

Sample B*

123

7.0

   

Sample C*

122

5.2

   

HPLC

Sample A*

95

4.8

Kempas**

98

3.5

Sample B*

101

3.5

   

Sample C*

98

4.1

   

Sample A*

97

4.4

Rubberwood***

99

2.8

Sample B*

105

4.3

   
 

Sample C*

94

3.9

   
  1. *Sample A = 10 μM; Sample B = 20 μM; Sample C = 50 μM.
  2. **Kempas was treated with 0.02% w/w of permethrin preservative. The treatment was done using vacuum impregnation vessel.
  3. ***Rubberwood was treated with 0.02% w/w of permethrin preservative. The treatment was done using vacuum impregnation vessel.