Products & Technology

    Total Phosphorus (TP) Analysis with Hach TNTplus: Principle, Procedure, and Test Ranges

    July 14, 20263 min readPT Detagg Presical Indonesia

    PT Detagg Presical Indonesia delivers an integrated solution for Total Phosphorus (TP) analysis using the Hach TNTplus System. Maximize your laboratory's efficiency with accurate colorimetric results recognized as equivalent to SNI and US EPA standards.

    Total Phosphorus (TP) Analysis: working principle and digestion stages of the Hach TNTplus system with the DRB200 reactor from PT Detagg Presical Indonesia

    Working Principle

    • Digestion: Breaks down complex phosphorus compounds into orthophosphate.
    • Colorimetry: Reaction with ammonium molybdate forms a blue compound measured spectrophotometrically.

    Digestion Stages

    • Preparation: Preheat the Hach DRB200 reactor (100 °C / 120 °C).
    • Inoculation: Add 2.0 mL of sample into the TNTplus vial.
    • Activation: Add the oxidizing reagent (persulfate tablet).
    • Heating: Digest the sample for 30 minutes.
    • Cooling: Let the vial cool in the rack to room temperature.
    Colorimetric procedure and TNTplus Low, Medium, and High Range kit specifications for Hach Total Phosphorus testing

    Colorimetric Procedure

    • Dosing: Add the reagent through the dosing cap.
    • Reaction Time: Allow the reaction to develop for 10 minutes.
    • Reading: Read results automatically via the vial barcode scan.

    Test Range Options

    RangeKitRange ValueApplication
    Low Range (LR)TNT8430.05 – 1.50 mg/L PClean water & rivers
    Medium Range (MR)TNT8440.5 – 5.0 mg/L PDomestic wastewater
    High Range (HR)TNT8452.0 – 20.0 mg/L PConcentrated industrial effluent
    Choose the TNTplus kit that matches your sample matrix and concentration range.

    This method is recognized as equivalent to official Indonesian standards, namely SNI 06-6989.31-2005 and US EPA Method 365.1.

    Integrated water analysis solution from PT Detagg Presical Indonesia: instrument & reagent supply, calibration & maintenance, and Hach technical support

    Complete Lifecycle Services

    • Original Instrument & Reagent Supply: DR3900 Spectrophotometer, DRB200 Reactor, and TNTplus vial reagents.
    • Calibration & Maintenance: Precision calibration with traceable certification plus industry-standard preventive maintenance programs.
    • Technical Support: Full service from installation to regulatory conformity.

    Consult your Hach instrumentation needs today with the PT Detagg Presical Indonesia technical team to choose the right test range, method, and lifecycle solution.

    Discuss your testing requirements

    Contact our sales and application team for technical consultation and Hach solution recommendations aligned with your laboratory's regulations.

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