Page 19 - 5_TOC in daily practice

SCA-130-509

■ Recovery rates with 680°C combustion Prepared Measured Recovery
technique Compound [mg/L] [mg/L] [%]
Compound Prepared Measured Recovery Urea 200.0 203.0 101.5
[mg/L] [mg/L] [%]
Ethanol Urea 2.000 1.986 99.3
200.0 201.2 100.6
2-Propanol Ethylurea 100.0 102.3 102.3
50.0 49.8 99.6
1-Pentanol Thiourea 200.0 201.8 100.9
166.2 166.6 100.2
1-Hexanol Thiourea 2.000 1.973 98.7
172.5 173.0 100.3
Nicotinic 200.0 198.5 99.3
Dimethyl- 139.5 141.5 101.4 acid
formamide
Nicotinic 2.000 1.932 96.6
Glucose 200.0 200.4 100.2 acid
Sucrose 200.0 197.5 98,8 Sulfanilic 200.0 199.3 99.7
acid
Sucrose 50.0 49.9 99.8
Sulfanilic 2.000 1.969 98.5
Sucrose 2.000 1.968 98.4 acid
Fructose 50.0 49.9 99.8
Sulfosuccin 52.7 53.0 100.6
Dodecyl- 55.0 56.0 101.8 ic acid
benzene
sulfonic acid Cyanuric 10.10 10.55 104.5
acid
L-glutamic 50.0 50.1 100.2
acid Acryl- 8.36 8.61 103.0
amide
Tartaric 50.0 49.8 99.6
acid Pyridine 200.0 197.1 98.6
hydro-
Citric acid 50.0 49.6 99.2 chloride

Tannine 47.0 47.4 100.9 Pyridine 2.000 1.983 99.2
Lignin 48.3 47.7 98.8 hydro-
chloride
Albumin 44.5 44.1 99.1
Quinine 200.0 202.3 100.4
Humic acid 44.7 45.3 101.3 hydro-
chloric
Caffeine 50.0 49.5 99.0
Quinine 2.000 2.008 100.8
1,10- 50.0 49.7 99.4
Phenan- hydro-
throline chloric
Catechin 50.0 49.1 98.2 Cellulose 100.0 98.6 98.6
(insoluble)
1,4-Benzo- 100.0 100.4 100.4
quinone Poly- 3.00 2.99 99.7
styrene
Sodium 100.0 98.3 98.3 (insoluble)
acetate
Nicotin- 200.0 198.9 99,5 Note: The recovery rate is effected by sample
amide preparation, instrument condition and surrounding
circumstances!
Nicotin- 100.0 101.3 101.3
amide

Nicotin- 2.000 1.993 99.7
amide