Journal of Chemistry / 2013 / Article / Tab 2 / Research Article
A Spectrophotometric Flow Injection Method for Determination of Ultratrace Amounts of Phenylhydrazine by Its Inhibition Effect on the Reaction of Thionin and Nitrite Table 2 Determination of phenylhydrazine in real samples.
Sampl
e
a
Concentration of phenylhydrazine added (μ mol L−1 ) Concentration of phenylhydrazine found (μ mol L−1 ) Recovery % 0.000 — — 0.100
0
.
1
0
8
±
0
.
0
0
2
108.00 Human serum 0.200
0
.
1
8
5
±
0
.
0
0
3
92.50 0.400
0
.
3
7
8
±
0
.
0
0
1
94.50 0.500
0
.
5
2
7
±
0
.
0
0
4
105.40 0.000 — — 0.100
0
.
1
0
5
±
0
.
0
0
5
105.00 River water (Zayandeh Rood) 0.200
0
.
1
9
3
±
0
.
0
0
2
96.50 0.400
0
.
3
8
9
±
0
.
0
0
5
97.25 0.500
0
.
5
2
1
±
0
.
0
0
7
104.20
a
A
verage from five determinations.
