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ČSN - Czech national standards
Page 4550
ČSN 420655-9 (14/05/1990) Withdrawn
Chemical analysis of silver and silver alloys. Determination of cadmium
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ČSN 420655-10 (14/05/1990) Withdrawn
Chemical analysis of silver and silver alloys. Determination of sodium
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ČSN EN ISO 11427 (01/10/2024)
Jewellery and precious metals - Determination of silver - Potentiometry using potassium bromide
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ČSN EN ISO 11427 (01/04/2017) Withdrawn
Jewellery - Determination of silver in silver jewellery alloys - Volumetric (potentiometric) method using potassium bromide
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ČSN EN 31427 (01/06/1996) Withdrawn
Determiantion of silver in silver jewellery alloys. Volumetric (potentiometric) method using potassium bromide (ISO 11427:1993)
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ČSN 420660-1 (26/11/1990) Withdrawn
Chemical analysis of Pt-Ir and Pt-Rh alloys. Determination of platinum
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ČSN 420660-2 (26/11/1990) Withdrawn
Chemical analysis of Pt-Ir and Pt-Rh alloys. Determination of iridium
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ČSN 420660-3 (26/11/1990) Withdrawn
Chemical analysis of Pt-Ir and Pt-Rh alloys. Determination of rhodium
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ČSN EN ISO 11210 (01/09/2023)
Jewellery and precious metals - Determination of platinum - Gravimetry using ammonium chloride
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