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Table 3 Application of standard addition technique to the analysis of PAR, PSE and CET in Allercet Cold® capsules using the proposed spectrophotometric methods

From: Analysis of paracetamol, pseudoephedrine and cetirizine in Allercet Cold® capsules using spectrophotometric techniques

Drug

RSDM method

SDR method

DRZC method

PCCA method

Claimed amount taken

Added

Recovery %a, b

Claimed amount taken

Added

Recovery %a, b

Claimed amount taken

Added

Recovery %a, b

Claimed amount taken

Added

Recovery %a, b

PAR

10.00 (µg mL−1)

5.000

104.6

10.00 (µg mL−1)

 5.000

105.9

10.00 (µg mL−1)

5.000

101.1

10.00 (µg mL−1)

5.000

103.1

10.00

104.0

10.00

104.9

10.00

100.8

10.00

103.8

15.00

105.1

15.00

105.3

15.00

101.2

15.00

102.3

Mean ± SD

104.6 ± 0.5210

Mean ± SD

105.4 ± 0.5490

Mean ± SD

101.0 ± 0.2330

Mean ± SD

103.1 ± 0.7360

PSE

100.75 (µg mL−1)*

50.00

104.0

100.8 (µg mL−1)

50.00

105.6

100.8 (µg mL−1)

50.00

104.1

100.8 (µg mL−1)

50.00

102.9

100.0

103.2

100.0

104.3

100.0

105.0

100.0

102.8

200.0

103.2

200.0

105.0

200.0

104.9

200.0

102.4

Mean ± SD

103.5 ± 0.4780

Mean ± SD

105.0 ± 0.6500

Mean ± SD

104.6 ± 0.5030

Mean ± SD

102.7 ± 0.2310

CET

2.250 (µg mL−1)*

2.000

105.7

2.250 (µg mL−1)

2.000

105.9

2.250 (µg mL−1)

2.000

103.8

2.250 (µg mL−1)

2.000

101.9

2.500

104.5

2.500

104.5

2.500

102.9

2.500

101.0

10.00

105.6

10.00

104.0

10.00

102.8

10.00

101.1

Mean ± SD

105.3 ± 0.6970

Mean ± SD

104.8 ± 1.018

Mean ± SD

103.2 ± 0.5460

Mean ± SD

101.3 ± 0.4800

  1. * Amount spiked was 100.00 µg mL−1 for PSE and 2.00 µg mL−1 for CET
  2. aAverage of three experiments
  3. b Recovery of the claimed amount taken