Brown-red standard colorimetric solution color number 2

Turbidity Standard RATIO 2 NTU, traceable to NIST Total nitrogen standard solution (total validity period: 6 months) Europium single element standard solution (total validity period: 12 months) Multi-element mixed standard solution | NI, MN, MG, AL, ZR, TI, FE, CU, ZN, CR, CD, B | Steel Research Institute Nanogram | 50ML | Standard material (RM) - solution type Total Phosphorus (P) Standard Solution

7 mixed solution standard substances of silver, bismuth, copper, iron, lead, palladium and antimony Turbidity Standards NON RATIO 0, 5 NTU, traceable to NIST Elemental ICP-MS Standard Solutions Aluminum in water | Hai'an Hongmeng | 30ML | Standard material (RM) - solution type Brown-red standard colorimetric solution No. 0.5-10 (Chinese Pharmacopoeia) (total validity period: 12 months)