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Light stimulated luminescence (PSL) system

NegotiableUpdate on 12/21

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Overview

The PPSL-18 Light Stimulated Luminescence (PSL) system is a light stimulated luminescence (PSL) system based on the principle of photoluminescence (PSL). It consists of a pulsed excitation light source (infrared excitation light source), a sample chamber, a detection probe, a photon counting system, and a control unit. It is used to quickly identify whether food and drugs have been irradiated or not, in accordance with the 2025 version of the National Drug Standard "Guiding Principles for Light Stimulated Luminescence Identification of Irradiated Traditional Chinese Medicine"

Product Details

PPSL-18Light stimulated luminescence (PSL) systemalso known asLuminescent system,Composed of a pulse excitation light source (infrared excitation light source), a sample chamber, a detection probe, a photon counting system, and a control unit, it is used for rapid identification of whether food and drugs have been irradiated. Widely used for rapid screening of traditional Chinese medicine decoction pieces, solid preparations containing raw powder, spices, seasonings, etc., it can effectively identify samples treated with ionizing radiation (irradiation) at a dose of 1kGy or above. Compliant with the 2025 version of irradiated traditional Chinese medicineLight stimulated luminescence (PSL)Guiding Principles for Identification Method: National Drug Standard "Guiding Principles for Photoluminescent Identification Method of Irradiated Traditional Chinese Medicine"

As an efficient and economical method for microbial sterilization, inhibition of plant germination, and extension of food shelf life, irradiation technology has been widely used in fields such as food and medicine. However, just like genetically modified foods, the effects of irradiated food and drugs on the human body are still unknown. For the long-term consideration of human health and safety, developed countries such as Europe and America have long strengthened their supervision of irradiated food and drugs. In China, with the increasing public awareness of food safety and the government's attention, food and drug regulatory authorities have also begun to strengthen their supervision of irradiated food and drugs to prevent irreversible consequences caused by the abuse of irradiation technology in the future.

Chinese medicinal herbs, spices, etc. usually contain or carry minerals (inorganic substances, silicates, etc.). When exposed to ionizing radiation (irradiation), these minerals store energy through their structural voids. When stimulated by excitation light, these stored energies will be released in the form of photons.OslIdentification method is a method of identifying whether traditional Chinese medicine decoction pieces and solid preparations containing raw powder have been subjected to ionizing radiation (irradiation) based on the number of photons released.

PPSL-18Light stimulated luminescence (PSL) systemadoptdiameter50mmPi'sSample dishThe required sample quantity is extremely small,Single sample testing time only takes 60 seconds.

The PPSL-18 is designed to be compact and small in size, requiring only one data cable to connect to a computer for operation. All testing processes, except for sample collection and placement, are completed by software operation.

Product Introduction

Adopting the principle of photoluminescence (PSL), it complies with the EU standard EN13751 and equivalent national standards.

Simultaneously display and record the photon count per second and photon release curve graph.

The combination of photon counting and photon release curve improves the recognition rate of suspected samples.

High sensitivity can identify low-dose radiation below 1kGy.

Extremely low sample pre-treatment requirements; No need for any chemical reagents.

The duration of a single sample testing is60Seconds, especially suitable for rapid screening.

Automatic data saving, data callback, and report generation for individual and batch samples.

Technical Specifications

Measurement principle: Light stimulated luminescence（PSL）The law

Excitation light source: infrared arrayLED

Photon Counting Detector: End Window Photomultiplier Tube Integrated High Voltage Power Supply

Dark count rate: typical value of 60CPS, maximum value of 150CPS (after avoiding light for 30 minutes at room temperature of 25 ℃)

Standard threshold: 700/5000

Preset testing cycle: 60 seconds

Sample dish: 50mm diameter Petri sample dish, made of aluminum alloy material, durable and long-lasting

Power supply: 220VAC/50Hz, power: 12W

Dimensions: Dimensions: 210 (W) X 260 (H) X 330 (D) mm

Weight: 11.2kg (net weight)

Comparison of spectra between negative samples (non irradiated) and positive samples (irradiated)

Negative sample (not irradiated)——

The number of excited photons is extremely low (less than)700）And the photon count value per unit time fluctuates horizontally around the background value.

Positive sample (radiation sample)——

The number of photons excited is very high (greater than5000）And the photon count value per unit time shows a significant downward trend.

光刺激发光（PSL）系统

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光刺激发光（PSL）系统

PPSL-18 Radiation Food and Drug Rapid Detection Device User Unit

Drug Testing Institute

Guangzhou Institute for Drug Control (drafting unit of the Pharmacopoeia Standard Draft for Guiding Principles of Photoluminescent Identification of Irradiated Traditional Chinese Medicine)

Beijing Institute of Drug Control

Yunnan Provincial Institute of Food and Drug Inspection and Research

Zhejiang Food and Drug Inspection and Research Institute

Ordos Inspection and Testing Center, Inner Mongolia

Changzhou Food and Drug Fiber Supervision and Inspection Center

Qingdao Institute of Food and Drug Inspection and Research

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