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ISO 3188

Starches and derived products; Determination of nitrogen content by the Kjeldahl method; Titrimetric method

Số trang: 3
Ngày phát hành: 1978-08-00

Liên hệ
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.
Số hiệu tiêu chuẩn
ISO 3188
Tên tiêu chuẩn
Starches and derived products; Determination of nitrogen content by the Kjeldahl method; Titrimetric method
Ngày phát hành
1978-08-00
Trạng thái
Có hiệu lực
Tiêu chuẩn tương đương
DIN 10303-2 (1980-12), IDT * DIN EN ISO 3188 (1994-10), IDT * BS EN ISO 3188 (1994-11-15), IDT * GB/T 22427.10 (2008), IDT * prEN 23188 (1994-01), IDT * EN ISO 3188 (1994-08), IDT * NF V03-607 (1969-07-01), NEQ * NF V03-607 (1979-11-01), IDT * NF V03-607 (1994-10-01), IDT * SN EN ISO 3188 (1994), IDT * OENORM EN ISO 3188 (1994-11-01), IDT * OENORM ISO 3188 (1993-04-01), IDT * PN-EN ISO 3188 (2000-02-08), IDT * SS-EN ISO 3188 (1995-02-03), IDT * UNE-EN ISO 3188 (1995-12-22), IDT * GOST 7698 (1993), IDT * STN EN ISO 3188 (2000-12-01), IDT * CSN EN ISO 3188 (1996-10-01), IDT * DS/EN ISO 3188 (1995-02-13), IDT * NEN-EN-ISO 3188:1994 en (1994-10-01), IDT
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Lịch sử ban hành
ISO 3188 (1978-08)
Starches and derived products; Determination of nitrogen content by the Kjeldahl method; Titrimetric method
Số hiệu tiêu chuẩn ISO 3188
Ngày phát hành 1978-08-00
Mục phân loại 67.180.20. Tinh bột và sản phẩm chế biến
Trạng thái Có hiệu lực
Từ khóa
Chemical analysis and testing * Chemical reactions * Definitions * Derivatives * Determination * Determination of content * Distillation * Food products * Hydrolysis * Instruments * Kjeldahls method * Methods * Nitrogen * Nitrogen content * Proteins * Starch products * Starches * Testing * Titration * Volumetric analysis * Procedures * Bushings * Chemicals * Interpretations * Content * Processes
Số trang
3