UNITED carbon products co

HARVEY ELECTRODE SERIES provides constant graphite to sample ratio1

Dr. C. E. Harvey, Harvey Associates, Glen Rock, N. J., first reported this new series of electrodes at the Eastern Analyti­ cal Symposium, Nov. 1959, in New York City. Dr. Harvey states that these electrodes enable the spectrocopist to vary the weight of a burned sample with little, if any, apparent variation in the intensity of the resulting spectra. Catalog No.

Sample

A

Β

C

Dl

D2

El

E2

UCP-115

.5MG

*

*

.242

.072

.054

.062

.124

UCP-116

1 MG

*

*

.242

.090

.068

.075

.150

UCP-117

2MG

*

*

.242

.127

.096

.075

.150

UCP-118

5MG

7/32

.125

.242

.154

.118

.125

.250

UCP-119

10 MG

7/32

.125

.242

.180

.136

.187

.250

UCP-120

20 MG

7/32

.175

.242

.242

.184

.187

.250

Overall length— 1 %"

Not Undercut

We believe these new Harvey electrodes will prove to be very valuable tools in the hands of spectrocopists faced with semi­ quantitative analysis of samples of varying sizes. FREE SAMPLES ! The proof is in the testing. Write today for free samples of these six electrodes . . . without obligation, of course.

UNITED

carbon products co. P.O. B O X 7 4 7 Circle No. 80 on Readers' Service Card

16 A

·

ANALYTICAL CHEMISTRY

BAY CITY,

MICHIGAN