Silver single element standard solution (2% nitric acid matrix) (total validity period: 12 months)

Zinc standard solution | 1000G/ML | BWRM | 20ML | Standard material (RM) - solution type [GLU1]-Human Fibrinopeptide B Standard Material for Mass Spectrometer Calibration Cadmium solution standard substance for atomic absorption spectrophotometer calibration (CD) Brown-red standard colorimetric solution stock solution Quinine sulfate solution standard material for fluorescence spectrophotometer calibration (GBW(E)130745~130749 is 300 yuan per set, choose one standard material to order, it is a set, please do not buy repeatedly)

Turbidity standard solution (0.5-4/set) (total validity period: 1 month) Aluminum single element standard solution | C (AL) = 1000G / ML (5% nitric acid matrix) | Bolinda | 20ML * 5 | Standard material (RM) - solution type Brown-yellow standard colorimetric solution BY2 (European Pharmacopoeia) Silver (AG) ICP-MS Standard Solution Multi-element mixed standard solution | NA, CA, K | 1000G/ML | Steel Research Nanogram | 50ML | Standard Material (RM) - Solution Type