S.I. No. 150/1949:

STANDARD SPECIFICATION (TURPENTINE) ORDER, 1949.

STANDARD SPECIFICATION (TURPENTINE) ORDER, 1949.

I, DANIEL MORRISSEY, Minister for Industry and Commerce, in exercise of the power conferred on me by subsection (3) of section 20 of the Industrial Research and Standards Act, 1946 (No. 25 of 1946), hereby order as follows :

1. This Order may be cited as the Standard Specification (Turpentine) Order, 1949.

2.--(1) The specification set forth in Part II of the Schedule to this Order is hereby declared to be the standard specification for the commodity described in Part I of the said Schedule.

(2) The said standard specification may be cited as Irish Standard 12 : 1949.

SCHEDULE.

PART I.

TURPENTINE.

PART II.

SPECIFICATION.

In this specification, the letters B.S., when followed by two sets of numbers, refer to the British Standard of which the first is the serial number and the second is the year of its publication by the British Standards Institution.

SCOPE.

1. Turpentine covered by this specification shall be one of the following types :--

Type 1 : Gum spirits of turpentine, sulphate wood turpentine or steam-distilled wood turpentine.

Type 2 : Destructively-distilled wood turpentine.

DESCRIPTION.

2. Turpentine covered by this specification shall be clear, colourless, and free from solid matter and from water. If it is required by the purchaser, the odour shall conform to that of an agreed sample.

PROPERTIES.

3. The specific gravity, refractive index, flash point and distillation of turpentine covered by this specification shall be within the limits for these properties set out in Table 1.

If the specific gravity is determined at a temperature other than 15·5° C., the specific gravity at 15·5° C./15·5° C. may be calculated from the figure determined by adding 0·00082 for each degree centigrade by which the temperature of determination exceeds 15·5° C. or by subtracting 0·00082 for each degree centigrade by which the temperature of determination is lower than 15·5° C.

If the refractive index is determined at a temperature other than 20° C., the refractive index at 20° C. may be calculated from the value determined by adding 0·00045 for each degree centigrade by which the temperature of determination exceeds 20° C. or be subtracting 0·00045 for each degree centigrade by which the temperature of determination is lower than 20° C.

The distillation shall be determined by the method described in Appendix A.

TABLE 1.

NON-VOLATILE RESIDUE.

4. The amount of residue remaining after evaporating 10 ml. of the material in a shallow flat-bottomed glass dish about 7·5 cm. in diameter and 2·5 cm. deep, on a bath of boiling water and subsequently heating for a period of two hours in an oven at 100° C. ± 2°C shall not exceed 2 per cent. by weight and shall be wholly organic.

RESIDUE AFTER POLYMERISATION.

5. The material after polymerisation in the manner described in Appendix B shall not leave a residue exceeding :

11 per cent. by volume for type 1 turpentine.

16 per cent. by volume for type 2 turpentine.

SAMPLING AND SIZE OF SAMPLES.

6. Representative samples, each measuring not less than one imperial pint, shall be taken in triplicate from one or more original and previously unopened containers or from the bulk during filling, and shall be packed in clean, dry, airtight, non-absorbent containers made of material on which the sample has no action. The containers shall be of such size that they are nearly filled by the sample. Each sample container so filled shall be sealed and shall be marked with the date of sampling and with sufficient information to identify the sample.

AGREED SAMPLE.

7. Except where otherwise agreed between purchaser and vendor, the agreed sample referred to in Clause 2 shall comply in all respects with the requirements of this specification. It shall measure not less than one imperial pint and shall be packed in the manner described in Clause 6.

APPENDIX A.

Method of Distillation.

(a) Apparatus :--The apparatus employed shall be the B.S. Distillation apparatus B.S. 658 : 1936 using :--

Distillation Flask 100 ml. (B.S. 571 : 1924).

Thermometer D 200 C/100 (B.S. 593 : 1940).

Asbestos board support for flask 150 mm. square with central hole 50 mm. diameter (B.S. 658 : 1936).

Condenser Type 1 (B.S. 658 : 1936).

(b) Method of Using Apparatus :--The apparatus shall be assembled as shown in Fig. 1 in B.S. 658 : 1936 Distillation Apparatus. 100 ml. of the turpentine to be tested shall be put into the flask and heat shall be so regulated that the turpentine distils at the rate of 4 to 5 ml. per minute.

(c) Thermometer Correction for Barometric Pressure :--The actual barometric pressure at the time of test shall be recorded and the specified temperature shall be corrected to 760 mm. pressure by applying a correction of 0·5° C. for each 10 mm. difference in barometric pressure from the standard pressure of 760 mm., the correction being added when the barometric pressure is below 760 mm. and subtracted when above 760 mm.

The correction must be applied before distillation is commenced.

APPENDIX B.

Polymerisation Test.

Five ml. of the turpentine shall be slowly added, drop by drop, to 20 ml. of 98·5 per cent. sulphuric acid contained in a 45 ml. B.S. flask (B.S. 676 : 1936) immersed in iced water. The flask shall be frequently shaken and care shall be taken to prevent the temperature of the mixture rising above 60° C. When the temperature of the mixture no longer rises on shaking, the flask shall be thoroughly agitated, immersed in a water bath and heated to between 60° C. and 65° C. for ten minutes, the contents being thoroughly mixed by shaking vigorously five or six times during this period.

The flask shall be cooled to room temperature and sufficient concentrated sulphuric acid shall be added to bring the level of the liquid into the neck of the flask near the zero of the graduated scale. The flask shall be allowed to stand overnight (or it may be centrifuged) and the volume of the unpolymerised residue shall be read off.

GIVEN under my Official Seal, this 23rd day of December, 1949.

DANIEL MORRISSEY,

Minister for Industry and Commerce.