Standard material for arsenic content determination

Standard materials for arsenic content determination primarily include arsenic standard solutions and arsenic standard samples in various forms, which are commonly used for calibrating measuring instruments and evaluating analytical methods.

The following is a detailed introduction:
Arsenic Standard Solutions:
Arsenic Standard Solutions in Water: For example, the arsenic standard material in water from the Tanmo Quality Inspection Standard Material Center, with a medium of 2% nitric acid, can achieve a standard value of 500 mg/L. It is suitable for various analytical testing methods such as inductively coupled plasma emission spectroscopy (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS), primarily used for instrument calibration, analytical method validation, and evaluation.
Arsenic calibration standard: Sigma-Aldrich's ICP/AAS arsenic calibration standard, with a concentration of 1000 mg/L As dissolved in 0.5 mol/L HNO₃, traceable to NIST standard reference materials. It is suitable for methods such as EPA 200.7, EPA 200.8, and can be used as a calibration standard for determining total arsenic in rice and rice flour using electrothermal atomic absorption spectroscopy.
Arsenic speciation standards: Arsenous acid (As³⁺) standards, arsenic acid (As⁵⁺) standards, dimethylarsenic (DMA) standards, monomethylarsenic (MMA) standards, and arsenobetaine (AsB) standards produced by the Chinese Academy of Metrology, which can be used to determine the content of different speciations of arsenic in samples such as aquatic products. By preparing mixed standard solutions with different concentration gradients, standard curves can be plotted for quantitative analysis.

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