|
Evaluation of the Arsenic Monitoring Kit using known standards of Arsenic |
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|
As. Conc. PPB or mgl |
|
|
|
|
|
0 |
0 |
0 |
0 |
|
|
10 |
8 |
10 |
12 |
|
|
20 |
22 |
18 |
20 |
|
|
30 |
30 |
32 |
35 |
|
|
40 |
42 |
45 |
40 |
|
|
50 |
50 |
52 |
52 |
|
|
60 |
65 |
62 |
55 |
|
|
70 |
72 |
75 |
67 |
|
|
80 |
80 |
83 |
83 |
|
|
90 |
95 |
87 |
93 |
|
|
100 |
110 |
105 |
95 |
|
|
Comparison with other competitive technologies: |
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| Parameter | Chem-In Corporation | Competitors | |
| 1. Calibration | Uses self calibrated detector tube | Comparison with color Chart | |
| 2. Arsenic emission | Arsenic emission nil - 100% absorbed | Arsenic generated is partially absorbed - Analyst exposed to poisonous arsine gas | |
| 3. Least count and Precision | Calibrates at 10 PPB intervals. Results can also be read at 2 PPB intervals | Results largely on judgment of color comparison. Precision at an average of 50 PPB | |
| 4. Measuring Range | Range of determination can be varied by adjusting the sample size. Standard 50 ml sample: 0 - 100 PPB | Limited range – No reliable results possible. | |
| 5. Reproducibility |
Very good |
Vague | |
| 6. Comparison with other instrumental techniques | Results obtained comparable to those from sophisticated instruments like HGAAS etc. | Results are vague | |
| 7. Reagents | All solid state reagents, non-corrosive and safe to handle | Corrosive acids/reagents used | |
| 8. Power/ Battery Requirements | No Electricity or Battery required | May be required | |
| 9. Spot evaluation of arsenic levels | Determination of arsenic at source possible | Not possible in Instrumental methods | |
| 10. Sample Type | Analysis of hair and nails can also be done accurately (method on request) | Not possible | |
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