{"id":3655,"date":"2025-06-16T13:26:25","date_gmt":"2025-06-16T05:26:25","guid":{"rendered":"https:\/\/www.pgeneral.com\/?p=3655"},"modified":"2025-06-16T13:26:25","modified_gmt":"2025-06-16T05:26:25","slug":"determination-of-iron-in-graphene-leachate-graphite-furnace-atomic-absorption-spectrometry","status":"publish","type":"post","link":"https:\/\/www.pgeneral.com\/pt\/applications\/determination-of-iron-in-graphene-leachate-graphite-furnace-atomic-absorption-spectrometry\/","title":{"rendered":"Determina\u00e7\u00e3o do ferro no liqueato de grafito"},"content":{"rendered":"
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  1. Method Overview<\/li>\n<\/ol>\n

    When iron ions in the sample are atomized, they absorb the resonance line (302.1nm) emitted by the iron hollow cathode lamp, and the absorption intensity is proportional to the iron content in the sample.<\/p>\n

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    1. Scope of Application<\/li>\n<\/ol>\n

      Applicable to the determination of iron in graphene leachate.<\/p>\n

      3.1 Instruments and Equipment<\/p>\n

      3.1.1 Detection Instruments<\/p>\n

      Graphite Furnace Atomic Absorption Spectrometer(Iron Hollow Cathode Lamp)<\/p>\n

      Cooling Circulating Water Device(Pump rated flow: 3.5L\/min )<\/p>\n

      Argon Gas(1 bottle Purity \u226599.99% )<\/p>\n

      Balance<\/p>\n

      3.1.2 Pretreatment Equipment<\/p>\n

      Volumetric Flask, Micropipette<\/p>\n

      3.2 Reagents<\/p>\n

      3.2.1 Reagents<\/p>\n

      Nitric Acid(Ultra-pure Grade)<\/p>\n

      Hydrochloric Acid(Ultra-pure Grade)<\/p>\n

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      1. 4. Operation Procedure<\/li>\n<\/ol>\n

        4.1 Preparation of Test Solution<\/p>\n

        Weigh 1g of graphene slurry into a beaker, add 20mL of aqua regia, digest on an electric hot plate at 200\u00b0C for 30 minutes, remove acid for 5 minutes, cool to room temperature, transfer to a 100mL volumetric flask, dilute to the mark with deionized water, mix well, and wait for testing.<\/p>\n

        4.2 Preparation of Standard Solution<\/p>\n

        Preparation of Iron Standard Working Solution (10\u03bcg\/mL): Accurately pipette 1.00mL of iron standard stock solution (1000\u03bcg\/mL) into a 100mL volumetric flask, dilute to the mark with (1+99) nitric acid solution, and shake well.<\/p>\n

        Preparation of Iron Standard Series: Pipette 0.00mL, 0.25mL, 0.50mL, 1.00mL, and 1.50mL of iron standard working solution (10\u03bcg\/mL) into 100mL volumetric flasks, dilute to the mark with deionized water, and shake well. Prepare standard series containing 0.00ng\/mL, 25.00ng\/mL, 50.00ng\/mL, 100.00ng\/mL, and 150.00ng\/mL of iron respectively.<\/p>\n

        4.3 Sample Testing<\/p>\n

        When testing the iron content in the sample, the graphite tube needs to be coated. Pipette 50\u03bcL of 10% zirconium solution into the graphite tube, heat according to the above heating program, and complete 3-5 coatings. Adjust the instrument, set the instrument parameters, and then pipette 10\u03bcL of the standard series solution and sample solution into the graphite tube in sequence to complete the sample testing.<\/p>\n

        4.4 Result Calculation<\/p>\n

        The iron concentration in the sample is calculated by the following formula:<\/p>\n

        \"\"<\/p>\n

        Where:<\/p>\n

        \u03c1(Fe): Mass concentration of iron in the sample, in milligrams per kilogram (mg\/kg);<\/p>\n

        \u03a11: Concentration of iron in the test sample obtained from the calibration curve, in nanograms per milliliter (ng\/mL);<\/p>\n

        V1: Volume of the test sample, in milliliters (mL);<\/p>\n

        m: Sample weight, in grams (g);<\/p>\n

        1000: Conversion coefficient.
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