TCVN 6238/2 - 1997
(EN 71-2 :1993) Safety of toys. Flammability

TCVN 6238/3 - 1997
(EN 71-3 :1988) Safety of toys. Migration of certain elements

TCVN 6238/6 - 1997
(EN 71-6 :1994) Safety of toys. Graphical symbol for age warning labelling

TCVN 6260 - 1997
Portland blended cements. Technical requirements

TCVN 6261 - 1997
(ISO 6730 :1992) Milk. Enumeration of colony forming unit of psychrotrophic micro organisms. Colony count technique at 65,C.

TCVN 6262/1 - 1997
(ISO 5541/2:1986) Milk and milk products. Enumeration of coliforms. Part 1 : Colony count technique at 30,C

TCVN 6262/2 - 1997
(ISO 5541/2:1986) Milk and milk products. Enumeration of coliforms. Part 2 : Most probable number technique at 3OoC

TCVN 6263 - 1997
(ISO 8261 :1989) Milk and milk products. Preparation of test samples and dilutions for microbiological examination

TCVN 6264 - 1997
(ISO 6610 :1992) Milk and milk products. Enumeration of colony forming units of micro organisms. Colony count technique at 30,C

TCVN 6265 - 1997
(ISO 6611 :1992) Milk and milk products. Enumeration of colony forming units of yeast and/or moulds. Colony count technique at 25'C

TCVN 6266 - 1997
(ISO 5538 :1987) Milk and milk products. Sampling. Inspection by attributes

TCVN 6267 - 1997
(ISO 8197:1988) Milk and milk products. Sampling. Inspection by variables

TCVN 6268 - 1997
(ISO 6736 :1982) Dried milk. Determination of nitrate and nitrite content. Method by cadmium reduction and photometry

TCVN 6269 - 1997
(ISO 8070: 1987) Dried milk. Determination of sodium and potassium content. Flame emission spectrometric method

TCVN 6270 - 1997
(ISO 6732: 1985) Milk and milk products. Determination of iron content. Spetrometric method (Reference method)

TCVN 6271 - 1997
(ISO 9874: 1992) Milk. Determination of total phosphoros content. Method using molecular absorption spectrometry