ISO 3188:1978
Current
The latest, up-to-date edition.
Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Titrimetric method
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English, French
01-08-1978
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The found value only includes free amino acids, compounds producing amino acids on hydrolysis and ammonium compounds. The principle consists in destruction of organic matter by sulphuric acid in the presence of a compound catalyst (see ISO 1871), alkalization of the reaction products, distillation of the liberated ammonia and collection in a boric acid solution, followed by titration with a standard volumetric sulphuric acid solution. The method applies to contents greater than 0,01 % (m/m). For products with contents less than 0,025 % (m/m), see ISO 5378.
| Committee |
ISO/TC 93
|
| DocumentType |
Standard
|
| Pages |
3
|
| ProductNote |
THIS STANDARD ALSO REFERS TO ISO 1227/ADD2
|
| PublisherName |
International Organization for Standardization
|
| Status |
Current
|
| Standards | Relationship |
| NF EN ISO 3188 : 1994 | Identical |
| NBN EN ISO 3188 : 1994 | Identical |
| NEN EN ISO 3188 : 1994 | Identical |
| NS EN ISO 3188 : 1ED 1994 | Identical |
| I.S. EN ISO 3188:1995 | Identical |
| PN EN ISO 3188 : 2000 | Identical |
| SN EN ISO 3188 : 1994 | Identical |
| UNI EN ISO 3188 : 1995 | Identical |
| SS-EN ISO 3188:1995 | Identical |
| UNE-EN ISO 3188:1995 | Identical |
| BS EN ISO 3188:1994 | Identical |
| EN ISO 3188:1994 | Identical |
| DIN EN ISO 3188:1994-10 | Identical |
| NFV 03 607 : 1979 | Identical |
| PREN ISO 20483 : DRAFT 2012 | CEREALS AND PULSES - DETERMINATION OF THE NITROGEN CONTENT AND CALCULATION OF THE CRUDE PROTEIN CONTENT - KJELDAHL METHOD (ISO/DIS 20483:2012) |
| DIN EN ISO 20483:2014-03 | CEREALS AND PULSES - DETERMINATION OF THE NITROGEN CONTENT AND CALCULATION OF THE CRUDE PROTEIN CONTENT - KJELDAHL METHOD (ISO 20483:2013) |
| I.S. EN ISO 20483:2013 | CEREALS AND PULSES - DETERMINATION OF THE NITROGEN CONTENT AND CALCULATION OF THE CRUDE PROTEIN CONTENT - KJELDAHL METHOD (ISO 20483:2013) |
| ISO 5378:1978 | Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Spectrophotometric method |
| UNI EN ISO 20483 : 2014 | CEREALS AND PULSES - DETERMINATION OF THE NITROGEN CONTENT AND CALCULATION OF THE CRUDE PROTEIN CONTENT - KJELDAHL METHOD |
| 12/30251275 DC : 0 | BS EN ISO 20483 - CEREALS AND PULSES - DETERMINATION OF THE NITROGEN CONTENT AND CALCULATION OF THE CRUDE PROTEIN CONTENT - KJELDAHL METHOD |
| UNE-EN ISO 20483:2014 | Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method (ISO 20483:2013) |
| BS EN ISO 20483:2013 | Cereals and pulses. Determination of the nitrogen content and calculation of the crude protein content. Kjeldahl method |
| BS EN ISO 5378:1994 | Starches and derived products. Determination of nitrogen content by the Kjeldahl method. Spectrometric method |
| ISO 20483:2013 | Cereals and pulses — Determination of the nitrogen content and calculation of the crude protein content — Kjeldahl method |
| EN ISO 5378:1994 | Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978) |
| EN ISO 20483:2013 | Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method (ISO 20483:2013) |
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