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Table 2 Comparison of the reported electrodes (sensors) with the proposed ammonium sensor

From: Development of Conductometric Sensor Based on 25,27-Di-(5-thio-octyloxy)calix[4]arene-crown-6 for Determination of Ammonium

Recognition element Transducing mode Linear range (mol L−1) Dynamic range (mol L−1) Sensitivity DL (mol L−1) Response time Storage stability Ref.
Nonactin in self-plasticizing poly(n-butyl acrylate) film Potentiometric 1 × 10−5–1 × 10−1 59 mV decade−1 1.0–4.0 × 10−6 At least 3 months [13]
Glutamate oxidase and glutamate dehydrogenase Amperometric 1 × 10−5–3 × 10−4 1 × 10−5–3.1 × 10−4 325.87 nA s−1 mM−1 2.06 × 10−6 10 s 18 days [14]
PANI/PSSMA (I) Amperometric 0–1 × 10−2 2.55 μA mM−1 [15]
PANI/PSSMA (II) Amperometric 0–1.25 × 10−2 12 μA mM−1
Crown-ether end-capped carbosilane dendrimer (15-crown-5-functionalized carbosilane dendrimer) Potentiometric 7.60 × 10−6–1.0 × 10−1 53.3 mV decade−1 3.9 × 10−6 6–10 s At least 45 days [16]
Pure culture of Nitrosomonas sp. Amperometric 1.4 × 10−4–1.43 × 10−3 0.030–0.036 n.s.r. 1.4 × 10−4 15–25 min (in 5–6 days 10–15 min) 14 days [17]
SiO2/ZrO2/phosphate-NH4 composite Potentiometric 1.0 × 10−6–1.0 × 10−2 7.7 × 10−7–4.0 × 10−2 31.3 mV decade−1 1.58 × 10−7 1 min 6 months [18]
Poly(vinyl chloride) membrane with nonactin Potentiometric 1.0 × 10−5–1.0 × 10−1 56 mV decade−1 8.0 × 10−6 20 s 6 months [19]
Zirconium titanium phosphate ion exchanger Potentiometric 1.0 × 10−4–1 1.2 × 10−5–1 42 mV decade−1 1.0 × 10−5 30 s Over 2 years (if stored under controlled conditions). [20]
Copper ion-doped clinoptilolite Amperometric 2.0 × 10−5–1.0 × 10−3 2.0 × 10−5–1.0 × 10−2 191 μA mol−1 L 5.0 × 10−6 1 min [21]
25,27-di-(5-thio-octyloxy)calix[4]arene-crown-6 Conductometric 1 × 10−5–1.5 × 10−3 1.0 × 10−5–1.0 × 10−2 8.22 μs mM−1 1.0 × 10−5 5–10 s 115 days This work
  1. PANI polyaniline, PSSMA poly(styrene sulfonate-co-maleic acid) anion, n.s.r. normalized signal response, DL limit of detection