This supplement to the loose-leaf collection of analytical methods started in 1984 [DSA 47, 7311] comprises 43 methods. Some of these are entirely new, while others are replacements for methods published in the original collection. A further 5 methods, with the code numbers L01.00-4, L02.00-4,...
Publisher
Beuth Verlag GmbH, Berlin, Germany
Citation
Amtliche Sammlung von Untersuchungsverfahren nach Paragraph 35 LMBG, 1987,
The official methods of analysis published in the 4 volumes of this loose-leaf collection are each designated by a number consisting of the product code followed by a serial number. Vol. I relates to analysis of foods and comprises several parts, the 1st of which starts with foods in general (Code...
Publisher
Beuth Verlag GmbH, Berlin, Germany
Citation
Amtliche Sammlung von Untersuchungsverfahren nach Paragraph 35 LMBG., 1984,
A Kjeldahl procedure for determination of N in milk is described, based on digestion with H2SO4 and K2SO4 with CuSO4 catalyst, liberation of NH3 by addition of NaOH, distillation of the NH3 into boric acid, and determination of the NH3 by titration against H2SO4 or HC1 using a pH meter or...
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Amtliche Sammlung von Untersuchungsverfahren nach Paragraph 35 LMBG, 1988, L01.00-10, pp 4 pp.
This standard corresponds to Federal German standard DIN 10 459, issued in 1988. It specifies apparatus, sample preparation, conduct of the analysis, correction of the result for temp., and repeatability and reproducibility requirements.
Citation
Amtliche Sammlung von Untersuchungsverfahren nach Paragraph 35 LMBG, 1988, L01.00-28, pp 2 pp.
The milk sample is cooled to the required sub-zero temp.; it is then subjected to mechanical vibration to induce crystallization. As a result, the temp. rapidly increases to a plateau value, corresponding to the f.p. of the milk. The thermistor cryoscope is calibrated by means of 2 standard...
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Amtliche Sammlung von Untersuchungsverfahren nach Paragraph 35 LMBG, 1988, L01.00-29, pp 3 pp.
An aqueous, fat- and protein-free extract of the milk is prepared. Lactose and lactulose present in the extract are hydrolysed with β-galactosidase. The quantity of fructose released is proportional to the lactulose content of the sample. The excess glucose formed (liberated from lactose), which...
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Amtliche Sammlung von Untersuchungsverfahren nach Paragraph 35 LMBG, 1988, L01.00-31, pp 3 pp.
This method corresponds to that specified in Federal German standard DIN 10 462, issued in 1988. It covers sensory evaluation of raw, pasteurized, sterilized and UHT milks by a 5-person panel, on a 0-5 scale. Appearance, flavour and aroma are evaluated. Tables are given showing max. scores for...
Citation
Amtliche Sammlung von Untersuchungsverfahren nach Paragraph 35 LMBG, 1988, L01.01/02, pp 3 pp.
Milk samples or dilutions thereof are mixed with Limulus amoebocyte lysate in the wells of a microtitre test plate, and incubated for 1 h at 37°C. Formation of a gel which cannot be sucked up with a capillary tube indicates a positive result. The bacterial lipopolysaccharide content may be...
Citation
Amtliche Sammlung von Untersuchungsverfahren nach Paragraph 35 LMBG, 1988, L01.02-1, pp 2 pp.
Milk samples or dilutions thereof are mixed with Limulus amoebocyte lysate in a test tube (10 mm diam.), and incubated for 1 h at 37°C. Formation of a gel which does not fall out if the tube is rotated through 180°C indicates a positive result. The bacterial lipopolysaccharide content of the sample ...
Citation
Amtliche Sammlung von Untersuchungsverfahren nach Paragraph 35 LMBG, 1988, L01.02-2, pp 2 pp.
This technique, which corresponds to that specified in Federal German Standard DIN 10 342 (issued in 1987), involves heating the sample in 25% HC1 to hydrolyse protein and liberate bound lipids, filtration, extraction of lipids with diethyl ether, evaporation of ether from the extract, and drying...
Citation
Amtliche Sammlung von Untersuchungsverfahren nach Paragraph 35 LMBG, 1988, L01.00-20, pp 3 pp.