Erbium (Er) Back Catalog number: 57068 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673995 Nitrofen, 10.0 µg/ml, Acetonitrile, 10ml Price on request 57019 Potassium (K), 1000µg/ml in 2%-HNO3/Water, 100ml Price on request 682369 Tolpyralate, 100 µg/ml, Acetonitrile, 1ml Price on request