1.19780

铬酸根(CrO4)离子标准液

traceable to SRM of NIST K₂CrO₄ in H₂O 1000 mg/l CrO₄ Certipur^®

• 同義詞: Chromate standard for aqueous matrices ready foruse, Nota 1 A
• 分類程式碼代碼: 41116107
• NACRES: NA.24

屬性

• 品質等級: 100
• 技術: ion chromatography: suitable
• pH值: 7 (20 °C in H₂O)
• 密度: 1.0 g/cm³ at 20 °C
• 應用: environmental; food and beverages
• 形式: single component solution
• 儲存溫度: 15-25°C

描述

分析報告

Concentration     β (CrO₄²⁻): 990 - 1010 mg/l
Determination method: Iodometric titration.
The content of this solution was determined with sodium thiosulfate standard solution (article number 1.09147) standardized against volumetric standard potassium iodate (article number 1.02404). The expanded measurement uncertainty is ± 0.4 % (k=2 coverage factor for 95% coverage probability). The certified value is traceable to primary standard NIST SRM 136f (NIST: National Institute of Standards and Technology, USA) by means of volumetric standard potassium iodate, measured in the accredited calibration laboratory of Merck KGaA, Darmstadt, Germany in accordance to DIN EN ISO/IEC 17025.

法律資訊

CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany

安全資訊

• 象形圖: GHS08
• 訊號詞: Danger
• 危險聲明: H340 - H350i
• 防範說明: P201 - P202 - P280 - P308 + P313 - P405 - P501
• 危險分類: Carc. 1B Inhalation - Muta. 1B
• 儲存類別代碼: 6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• 水污染物質分類（WGK）: WGK 1
• 閃點（°F）: Not applicable
• 閃點（°C）: Not applicable