Environmental Reference Standards
1702440100 · Merck
Tungsten standard solution traceable to SRM from NIST (NH4)2WO4 in H2O 1000 mg/l W Certipur®
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1703580100 · Merck
Terbium ICP standard traceable to SRM from NIST Tb(NO₃)₃ in HNO₃ 2-3% 1000 mg/l Tb Certipur®
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