Table 1 Optimization of the sensor matrix composition.

From: Nanoparticle modified paper-based analytical sensor for calcium determination in human nasal secretions and its association with olfactory dysfunction

Composition % (w/w)

LLOQ, (M)

Linearity range, (M)

Slope, (mV/decade)

Response time, (s)

PVC

DOP

ETH 1001

49.5

49.5

1

2.5 × 10–6

1.0 × 10–5–1 × 10–1

26.33

60

49

49

2

2.0 × 10–7

1 × 10–6–1.0 × 10–1

27.99

45

48

48

4

7.5 × 10–8

1.0 × 10–7–1.0 × 10–1

29.14

20

47

47

6

7.5 × 10–7

1.0 × 10–6–1.0 × 10–1

26.5

35

  1. Significant values are in bold.
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