Copper solution standard substance for atomic absorption spectrophotometer calibration (CU)

Brown-red standard stock solution/Special for 2020 Pharmacopoeia Silver single element standard solution (2% nitric acid matrix) (total validity period: 1 month) Turbidity Standard RATIO 0, 4 NTU, traceable to NIST Multi-element mixed standard solution | CR, CO, NI, CU, AS, SB, PB | 100G/ML | Steel Research Nano-Gram | 50ML | Standard material (RM) - solution type Silver, aluminum, arsenic, barium, beryllium, calcium, cadmium, cobalt, chromium, copper, iron, gallium, potassium, lithium, magnesium, manganese, sodium, nickel, lead, selenium, strontium, thallium, vanadium, zinc multi-element standard solution (total validity period: 3 months)

Brown-red standard colorimetric solution color number 3 Multi-element mixed standard solution | BE, IN, BI, TL | 1G/ML | Steel Research Institute Nanogram | 50ML | Standard Material (RM) - Solution Type Turbidity Standard RATIO 40 NTU, traceable to NIST 12 kinds of metal elements mixed standard (AS, CD, CO, CR, CU, HG, NI, MO, PB, SE, ZN, SB) | Multi-component | 1000G/ML | CATO | 100ML | Standard material (RM) - solution type Cadmium solution standard material for atomic absorption spectrophotometer calibration - blank