Paragraph 4 Apparatus
The following apparatus shall be used:–
(a)
A Lovibond “all purposes” comparator complete with stand for work in reflected light.
(b)
A Lovibond comparator disc A.P.T.W. or A.P.T.W.7.
(c)
Two fused glass cells, 25 mm. depth.
(d)
A water bath or incubator capable of being maintained at 37.5°C.±0.5°C.
(e)
A pipette to deliver 5.0 ml.
(f)
A supply of 1.0 ml. straightsided pipettes of an accuracy equal to that of N.P.L. grade B.
(g)
A 1,000 ml. graduated flask.
(h)
A 100 ml. measuring cylinder.
(i)
A supply of test tubes conforming to British Standard 3218: 1982, nominal size 150/16, with rubber stoppers to fit.