Table 1.
Determination of element wt % in intermediates and catalyst by various methods.
|
Entry |
Technique |
Portion |
NM |
NM‐SiO2 |
NM‐SiO2@SiPA |
NM‐SiO2@SiPA‐MA |
NM‐SiO2@SiPA‐MA‐Arg |
NM‐SiO2@SiPA‐MA‐Arg @HPA |
|---|---|---|---|---|---|---|---|---|
|
1 |
FAA |
Fe % |
69.80 % |
39.92 % |
36.22 % |
33.65 % |
31.40 % |
14.50 % |
|
2 |
W % |
– |
– |
– |
– |
– |
40.41 % |
|
|
3 |
Zn % |
– |
– |
– |
– |
– |
1.42 % |
|
|
4 |
P % |
– |
– |
– |
– |
– |
1.20 % |
|
|
5 |
ICP‐OES |
Fe % |
71.04 % |
38.87 % |
35.36 % |
32.98 % |
31.59 % |
13.91 % |
|
6 |
Si % |
– |
16.34 % |
17.19 % |
16.81 % |
16.23 % |
7.21 % |
|
|
7 |
W % |
– |
– |
– |
– |
– |
41.07 % |
|
|
8 |
Zn % |
– |
– |
– |
– |
– |
1.29 % |
|
|
9 |
P % |
– |
– |
– |
– |
– |
1.14 % |
|
|
10 |
CHNS |
C % |
– |
– |
2.17 % |
4.29 % |
6.27 % |
2.54 % |
|
11 |
H % |
0.44 % |
1.19 % |
1.41 % |
1.64 % |
2.05 % |
0.98 % |
|
|
12 |
N % |
– |
– |
0.84 % |
0.84 % |
2.41 % |
1.05 % |