Table 2.
Criteria ranges of substances and results for proficiency tests
| No. | Chemical name | LLNA result | Criteria ranges (%) | Lab 1 | Lab 2 | Lab 3 | Lab 4 | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1st Run 2nd Run | 1st Run 2nd Run | 1st Run 2nd Run | 1st Run 2nd Run | |||||||||
| CysteineLysine | Cysteine Lysine |
Cysteine Lysine |
Cysteine Lysine |
Cysteine Lysine |
Cysteine Lysine |
Cysteine Lysine |
Cysteine Lysine |
|||||
| 1 | Oxazolone | S |
42.8 ≤ CDR ≤ 78.1 |
95.8 ≤ LDR ≤ 100 |
62.0 | 57.7 | 49.2 | 51.7 | 69.8 | 61.5 | 43.9 | 44.4 |
| 99.1 | 96.4 | 98.5 | 98.0 | 99.5 | 99.4 | 99.7 | 99.7 | |||||
| 2 | Trimellitic anhydride | S |
0.0 ≤ CDR ≤ 0.6 |
90.4 ≤ LDR ≤ 100 |
0.0 | 0.0 | 0.7 | 0.0 | 0.0 | 0.0 | 5.6* | 10.4* |
| 98.9 | 99.9 | 99.8 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | |||||
| 3 | Benzylideneacetone | S |
24.0 ≤ CDR ≤ 100 |
0.0 ≤ LDR ≤ 23.0 |
88.9 | 87.5 | 74.2 | 76.6 | 86.5 | 87.9 | 83.3 | 83.2 |
| 1.1 | 6.6 | 9.8 | 0.0 | 0.0 | 0.0 | 10.2 | 13.9 | |||||
| 4 | 2,4-Heptadienal | S |
92.8 ≤ CDR ≤ 100 |
67.6 ≤ LDR ≤ 100 |
91.3* | 90.6* | 99.9 | 98.1 | 98.9 | 99.4 | 97.5 | 96.4 |
| 69.0 | 40.2* | 96.3 | 76.5 | 80.9 | 89.6 | 80.6 | 77.4 | |||||
| 5 | Glyoxal solution | S |
38.5 ≤ CDR ≤ 100 |
36.6 ≤ LDR ≤ 79.7 |
60.7 | 68.4 | 81.0 | 77.7 | 74.4 | 73.5 | 76.5 | 75.3 |
| 61.1 | 63.3 | 66.9 | 66.8 | 43.7 | 58.8 | 62.5 | 70.1 | |||||
| 6 | Ethylene glycol dimethacrylate | S |
71.5 ≤ CDR ≤ 99.8 |
0.0 ≤ LDR ≤ 7.9 |
74.2 | 75.6 | 82.6 | 85.2 | 83.0 | 84.2 | 93.8 | 94.1 |
| 0.0 | 2.8 | 3.0 | 5.3 | 0.0 | 0.0 | 21.0* | 7.3 | |||||
| 7 | 1-Butanol | NS |
0.0 ≤ CDR ≤ 4.6 |
0.0 ≤ LDR ≤ 9.4 |
0.2 | 4.1 | 0.0 | 1.6 | 1.1 | 2.5 | 4.1 | 4.5 |
| 0.0 | 5.3 | 3.4 | 0.3 | 0.0 | 0.0 | 6.5 | 3.0 | |||||
| 8 | 6-Methylcoumarin | NS |
0.0 ≤ CDR ≤ 8.0 |
0.0 ≤ LDR ≤ 13.6 |
5.7 | 3.4 | 0.0 | 6.1 | 0.0 | 2.0 | 1.5 | 4.9 |
| 5.9 | 4.6 | 5.3 | 2.0 | 0.0 | 0.0 | 8.6 | 10.0 | |||||
| 9 | Lactic Acid | NS |
0.0 ≤ CDR ≤ 8.7 |
0.0 ≤ LDR ≤ 11.3 |
2.1 | 3.4 | 0.7 | 0.0 | 0.8 | 4.5 | 4.8 | 7.6 |
| 3.5 | 9.5 | 8.2 | 2.0 | 0.0 | 0.0 | 10.5 | 2.2 | |||||
| 10 | 4-Methoxyacetophenone | NS |
0.0 ≤ CDR ≤ 8.0 |
0.0 ≤ LDR ≤ 13.6 |
3.1 | 0.3 | 4.0 | 8.7* | 2.3 | 5.1 | 4.5 | 7.1 |
| 3.0 | 2.3 | 1.4 | 0.0 | 0.0 | 0.0 | 10.3 | 0.0 | |||||
CDR cysteine depletion rate, LDR lysine depletion rate, *data out of the criteria ranges