Extractive Spectrophotometric Method for Determination of Molybdenum in Steels and Environmental Samples

Table 3

Analysis of molybdenum samples by the proposed method.

Sr. no.	Composition of sample		Mo foundb/μg
	Matrixa	Mo added/μg
1	Fe(0.3), Th(0.1), U(0.9), Cr(0.5)	15	14.93
2	Zn(0.6), Co(1.5), Cu(2)	20	20.10
3	Zn(5), Cu(2.5), Mn(5), V(1)	20	20.00
4	Re(0.1), Ag(1.5), Ba(4), Co(2)	15	14.90
5	Ti(0.01), Cr(0.5), Cu(0.5), Fe(2)	8	8.05
6	Pt(0.1), V(1.5), Au(1), Mg(4)	20	21.10
7	[Co(0.0004), Cu(0.0075), Mn(0.015), Ni(0.0563), Cr(0.015), Fe(0.2175)]c	15	14.90
8	[Cu(0.01), Ni(0.0912), Cr(0.190), Fe(0.70)]c	10	10.05
9	[Mn(0.033), Ni(0.33), Cr(0.4665), Fe(2.6655)]c	15	15.00
10	Well water	20	19.90 ± 0.19d
11	Canal water	15	15.15 ± 0.11d
12	Industrial effluent	20	20.18 ± 0.15d
13	Reverberatory flue dust	20	19.70 ± 0.11
14	BCS(406/1)	1.00%e	0.995 ± 0.015%d
15	BCS(261/1)	0.11%e	0.106 ± 0.002%d
16	BCS(219/4)	0.58%e	0.568 ± 0.003%d

aNumber in brackets indicates mg amounts of elements in the aliquot for analysis.
bAverage of triplicate analyses.
cSample nos. 7, 8, and 9 are analogous to stainless steel, stainless U, and cast steel, respectively.
dMean ± relative standard deviation (𝑛=6).
eCertified value.