Hengyuan Fine Chemical Provides Professional Pesticide Mixed Standard Solutions!

The 2025 Edition of the Pharmacopoeia of the People's Republic of China will be officially implemented from October 1, 2025. Regarding traditional medicine safety, the key updates in General Rule 2341 "Determination of Pesticide Residues" (Part IV) include: 

• Revision of Method 5: Determination of Multiple Prohibited Pesticide Residues in Chinese Medicinal Materials and Decoction Pieces (Plant Origin).
• Addition of Method 6: Determination of Multiple Pesticide Residues in Specific Medicinal Materials and Decoction Pieces, and Method 7: Determination of Dithiocarbamate Pesticide Residues in Medicinal Materials and Decoction Pieces.

To assist clients in adapting to the 2025 Pharmacopoeia updates, Hengyuan Fine Chemical  offers comprehensive, precise, and reliable pesticide mixed standard solutions tailored to all sections of Rule 2341.

 

Methods and Corresponding Mixed Standard Solutions:

Method 1: Determination of Organochlorine Pesticide Residues (Chromatography)

• 9 Organochlorine Pesticides

         Analytical Method: Gas Chromatography (GC), External Standard Calibration Curve Method.

         Product: [Table: Hengyuan Fine Chemical Mixed Standards]

• 22 Organochlorine Pesticides

        Analytical Method: GC, External Standard Calibration Curve Method.

        Product: [Table: Hengyuan Fine Chemical Mixed Standards]

Method 2: Determination of Organophosphorus Pesticide Residues (Chromatography)

Analytical Method: GC, External Standard Calibration Curve Method.

Product: [Table: Hengyuan Fine Chemical Mixed Standards]

Method 3: Determination of Pyrethroid Pesticide Residues (Chromatography)

Analytical Method: GC, External Standard Calibration Curve Method.

Product: [Table: Hengyuan Fine Chemical Mixed Standards]

Method 4: Determination of Multiple Pesticide Residues (Mass Spectrometry)

• GC-Tandem Mass Spectrometry (MS/MS) (88 Pesticides + 3 Internal Standards)

         Quantification: Internal Standard Calibration Curve Method.

         Product: [Table: Hengyuan Fine Chemical Mixed Standards]

• LC-Tandem Mass Spectrometry (MS/MS) (523 Pesticides + 3 Internal Standards)

         Quantification: Internal Standard Calibration Curve Method.

         Product: [Table: Hengyuan Fine Chemical Mixed Standards & Sets]

Method 5: Determination of Multiple Prohibited Pesticide Residues in Medicinal Materials (Plant Origin) – Revised

Analytical Methods:

• GC-MS/MS, Internal Standard Calibration Curve Method.
• HPLC-MS/MS, External Standard Calibration Curve Method.

Key Updates vs. 2020 Edition:

1. Expanded pesticide coverage.
2. Optimized preparation of matrix-mixed control and test solutions.
3. Adjusted LC-MS/MS chromatographic and mass spectrometric conditions.
4. Reduced internal standard solution volume in GC-MS/MS.

Product: [Table: Hengyuan Fine Chemical Mixed Standards]

Method 6: Determination of Multiple Pesticide Residues in Specific Medicinal Materials – Newly Added

Analytical Methods:

• GC-MS/MS, Internal Standard Calibration Curve Method.
• HPLC-MS/MS, External Standard Calibration Curve Method.

Product: [Table: Hengyuan Fine Chemical Mixed Standards]

Hengyuan Fine Chemical  – Your Partner in Pharmacopoeia Compliance!

Precision standards for accurate, efficient, and compliant pesticide residue analysis.