$51.22

Copper Standard, 20 ppm Cu - 2290-16

$91.79

Copper Standard, 10,000 ppm Cu - 2305-4

$105.38

Copper Standard, 1000 ppm Cu in 0.3 M HNO? - 2302-16

$96.12

Copper Standard, 0.1 ppm Cu in 12.5% (v/v) Ethanol - R2279010-500A

$97.74

Copper Standard, 0.5 ppm Cu in 12.5% (v/v) Ethanol - R2279050-500A

$248.64

Copper Standard, 50 ppm Cu in H?O - R2292700-4A

$99.74

Copper Standard, 1.0 ppm Cu in 12.5% (v/v) Ethanol - R2279100-500A