Chwilio Deddfwriaeth

First Commission Directive of 15 June 1971 establishing Community methods of analysis for the official control of feeding-stuffs (71/250/EEC) (repealed)

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Deddfwriaeth yn deillio o’r UE

Pan adawodd y DU yr UE, cyhoeddodd legislation.gov.uk ddeddfwriaeth yr UE a gyhoeddwyd gan yr UE hyd at ddiwrnod cwblhau’r cyfnod gweithredu (31 Rhagfyr 2020 11.00 p.m.). Ar legislation.gov.uk, mae'r eitemau hyn o ddeddfwriaeth yn cael eu diweddaru'n gyson ag unrhyw ddiwygiadau a wnaed gan y DU ers hynny.

Changes over time for: Division 3.

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Version Superseded: 26/08/2009

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Cyhoeddir Cyfarwyddebau’r UE ar y wefan hon i gynorthwyo croesgyfeirio o ddeddfwriaeth y DU. Ers diwrnod cwblhau’r cyfnod gweithredu (31 Rhagfyr 2020 11.00 p.m.) nid oes unrhyw ddiwygiadau wedi'u cymhwyso i'r fersiwn hon.

3.ReagentsU.K.

3.1.40% ethanol (v/v) d: 0·948 at 20 oC, neutralised to phenolphthalein.U.K.
3.2.Carrez solution I: dissolve in water 21·9 g of zinc acetate Zn (CH3 COO)2 · 2H2O and 3 g of glacial acetic acid. Make up to 100 ml with water.U.K.
3.3.Carrez solution II: dissolve in water 10·6 g of potassium ferrocyanide [X1K 4 Fe (CN) 6 · 3H 2 O]. Make up to 100 ml with water.U.K.
3.4.0·1% solution (w/v) of methyl orange.U.K.
3.5.Hydrochloric acid 4 N.U.K.
3.6.Hydrochloric acid 0·1 N.U.K.
3.7.Sodium hydroxide solution 0·1 N.U.K.
3.8.Luff-Schoorl reagent:U.K.

Stirring carefully, pour the citric acid solution (3.8.2) into the sodium carbonate solution (3.8.3). Add the copper sulphate solution (3.8.1) and make up to 1 litre with water. Leave to settle overnight and filter. Check the normality of the reagent thus obtained (Cu 0·1 N; Na2 CO3 2 N). The solution's pH should be approximately 9·4.

3.8.1.Copper sulphate solution: dissolve 25 g of copper sulphate A.R., Cu SO4 · 5H2O, free from iron, in 100 ml of water.U.K.
3.8.2.Citric acid solution: dissolve 50 g of citric acid A.R., C6H8O7 · H2O in 50 ml of water.U.K.
3.8.3.Sodium carbonate solution: dissolve 143·8 g of anhydrous sodium carbonate A.R. in approximately 300 ml of warm water. Leave to cool.U.K.
3.9.Sodium thiosulphate solution 0·1 N.U.K.
3.10.Starch solution: add a mixture of 5 g of soluble starch in 30 ml of water to 1 litre of boiling water. Boil for three minutes, leave to cool and if necessary add 10 mg of mercuric iodide as a preservative.U.K.
3.11.Sulphuric acid 6 N.U.K.
3.12.30% solution (w/v) of potassium iodide.U.K.
3.13.Granulated pumice stone boiled in hydrochloric acid, washed in water and dried.U.K.
3.14.3-methylbutan-l-ol.U.K.

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