BS 6806:2002
$86.31
Textiles. Determination of formaldehyde. Method for the determination of total and free (water extraction method) formaldehyde using chromotropic acid
| Published By | Publication Date | Number of Pages |
| BSI | 2002 | 12 |
This British Standard describes two methods for determining formaldehyde on textiles: “total formaldehyde” and “free and water-soluble formaldehyde” using chromotropic acid and sulfuric acid for detection and quantification. The methods may be applied to any textile product containing a formaldehyde-based precursor.
The methods are not compatible with and cannot be compared directly with BS EN ISO 14184-1 and BS EN ISO 14184-2.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | Committees responsible for this British�Standard |
| 3 | Contents |
| 5 | 1 Scope 2 Normative references 3 Apparatus and reagents 3.1 Balance 3.2 Conical flasks 3.3 Boiling tubes 3.4 Sintered glass filters 3.5 Water bath 3.6 Volumetric flasks 3.7 Spectrophotometer 3.8 Purified water 3.9 Chromotropic acid 3.10 Concentrated sulfuric acid 3.11 Sulfuric acid 3.12 Sulfuric acid 3.13 Formaldehyde solution in water 3.14 Wetting agent |
| 6 | 4 Total formaldehyde 4.1 Principle 4.2 Test specimens 4.3 Procedure |
| 7 | 5 Free and water-soluble formaldehyde 5.1 Principle 5.2 Test specimens 5.3 Procedure |
| 8 | 6 Calibration graph 6.1 Prepare a stock solution containing approximately 5�mg/ml of formaldehyde by diluting 370�g/l… 6.2 For the total formaldehyde method, dilute aliquots (2, 3, 4, 6, 8, 10, 12, 16, 20�ml) of the … 6.3 For free and water-soluble formaldehyde method, dilute aliquots (2, 3, 4, 6, 8, 10, 12, 16, 2… 6.4 To duplicate 1.0�ml aliquots of the stock solutions, add 4.0�ml 7.5�M sulfuric acid ( 7 Calibration and expression of results 8 Test report |
| 9 | Annex A (normative) Standardization of formaldehyde stock solutions A.1 Reagents A.1.1 Sodium thiosulfate solution A.1.2 Iodine solution A.1.3 Sodium hydroxide solution A.1.4 Sulfuric acid A.1.5 Aqueous formaldehyde solution A.1.6 Starch indicator A.2 Procedure A.3 Calculation |
