Schedule 1 PROVISIONS TO BE INSERTED IN PARTS I AND II OF SCHEDULE 2 TO THE PRINCIPAL REGULATIONS

“2

Reagents

Except where otherwise specified in the method of analysis, all reagents shall be of analytical quality. Where trace elements are to be determined, the purity of the reagents used shall be checked by means of a blank test.

2A

Water

(a)

Except where otherwise specified, a reference in this Part of this Schedule to water shall be a reference to demineralized or distilled water.

(b)

For the determination of any form of nitrogen, water shall be free of all nitrogenous compounds and carbon dioxide.

(c)

Except where the method of analysis specifies a particular solvent or diluent, all dissolution, dilution, rinsing and washing operations mentioned in the methods of analysis shall be carried out using water.

2B

Apparatus

(a)

Only special instruments and apparatus and specifically required apparatus and equipment are mentioned in the methods of analysis.

(b)

Apparatus and equipment shall be clean.

(c)

The accuracy of graduated glassware shall be assured by reference to the appropriate standards.”