What is Halogen halogen detection? How many items should be tested in the halogen report?

Date：2023-03-09 14:00:00 Views：1915

Halogen test, halogen-free test and HF test all mean halogen test. Halogen compounds are widely used in the electronic industry. For example, chlorinated paraffin can be used as a plasticizer for plastic materials, and difluorodichloromethane can be used as a foaming agent in ABS, PS, PVC, PU and other plastics. However, halogen compounds are widely used as flame retardants. Common halogen flame retardants include bromine flame retardants such as PBB, PBDE, TBBP-A and HBCDD, and chlorine flame retardants such as short-chain chlorinated paraffin and PCB. To help you understand, the following content is organized by Chuangxin Testing Network for your reference.

Halogen halogen is used in flame retardants, refrigerants, solvents, organic chemical raw materials, pesticides and insecticides, bleaching agents, wool degreasing agents, etc. Halogens are toxic to the immune system, affect the endocrine system, affect reproduction and development, and have carcinogenic effects. Most halogens are environmental hormone substances.

Halogens are mainly used in electronic and electrical industries, including circuit boards, computers, fuel cells, televisions and printers. If halogenated plastic is ignited by fire, it will release corrosive gases, and the elements of these corrosive gases (such as chlorine) may damage the electronic energy. Toxic elements can also affect the immune and endocrine system of human beings, and the research also points out that these toxins may cause cancer and genetic changes to human body. Major companies in the world are actively promoting the complete abolition of halogen-containing materials, such as stopping the use of halogen-containing positive combustion agents in products.

What is a halogen (generally speaking: halogen detection, halogen test, Halogen free statement, halogen-free statement, etc.) Halogen (halogen) is the VA group of non-gold elements, including oxygen (Fluorine -), complex chlorine (Bromine), iodine (Astine), five elements, collectively known as halogen. Astatine is a radioactive element. People generally refer to halogen as fluorine, chlorine, Australia and iodine. Halogen compounds are often used as a burning agent: PBB, PBDE, TBBP-A, PCB, 62ane, triazine phenol, short shoe compound paraffin, etc., and are used in electronic components and data product shells, plastics, etc. This kind of positive combustion agent can not be recycled, and will release harmful substances in the process of burning and heating, threatening human health, environment and future generations.

Harm and restriction of halogen

As a flame retardant, halogens (nitrogen, chlorine, Australia, iodine) are added to polymer products such as plastics to improve the ignition point of materials. The advantages are that the polymer with halogen added has a higher ignition point than the general polymer data, and the ignition point is about 300 ℃. When burning, halogenated gases (fluorine, chlorine, bromine, iodine) will be emitted, and oxygen will be rapidly absorbed, thus putting out the fire.

The disadvantage is that when the concentration of the re-gas released is high, the visibility will be reduced, which will lead to the unidentified escape route. The re-gas together has a strong toxicity and affects the respiratory system of people. In addition, the halogenated surface gas released from the halogenated polymer incineration will generate corrosive harmful gas (halogenated gas) when combined with water vapor, which will cause corrosion to some equipment and buildings. One of these halogen-containing flame retardant materials produced dioxins during incineration, which could exist in the environment for many years, even accumulated in the organism for life, and could not be discharged. Therefore, many large companies in the world are actively promoting the complete abolition of halogen-containing materials, such as stopping the use of halogen-containing positive combustion agents in products.

Halogen-free requirements: there is no uniform specification for the limit value of halogen. According to the world example, the limit value of halogen detection is, the chlorine content is less than 900ppm, and (+) is less than 1500ppm. Generally, there is no clear requirement for polyfluoride and iodine. The halogen-free requirements put forward by general customers are not contained, and the test result is required to be ND. The detailed limit value requirements require customers to put forward their own requirements according to the acceptance level.

Now, different products have different quantitative specifications for halogen-free requirements:

For example, the halogen target between halogen-free wires and cables is: the value of all halogens s50PPIM; (According to the regulation PREN 14582), the content of hydrogen halide gas after incineration is less than 100PPM; (According to the regulation EN 5067-2-1), the PH value of the halogenated gas after incineration dissolved in water is 24.3 (weakly acidic) (according to the regulation EN-5 0267-2-2), and the light transmittance of the product through a beam of light after incineration in a closed container is 260%; (According to the regulation EN-50268-2), there is no requirement: the chlorine content is less than 900ppm, (Australia+chlorine) is less than 1500ppm. Halogen IEC-61249-2-21

Halogen test items:

Halogen detection, rohs detection, moisture detection, sulfur content detection, ion reducibility, ion quantitative detection, content determination, etc.

Halogen detection standard:

ASTM D2988-199 (21) Test for water-soluble halogen ions in halogenated organic solvents and their admixtures

BS EN ISO 952-24 Water quality - Determination of absorbable halogen (AOX)

BS EN 1477-23 (R24) Petroleum products - Determination of organic halogen content

BS EN 529-2-2-22 Communication cables - Part 2-2: General design rules and manufacture of halogen-free flame retardant insulating mixtures

AS/NZS 1.2.3-1998 Test Methods for Sheathed Conductors of Electronic Cables 2.3: Specific Properties of Insulated Extruded Semiconductor Shields and Non-metallic Enclosures PVC and Halogen Thermoplastic Materials

GB/T 11848.7-1989 Determination of halogen in uranium ore concentrate

GB/T 15959-1995 Water Quality - Determination of Absorbable Organic Halogens (AOX)

GB/T 3339-201 Optical functional film Determination of halogen content of cellulose triacetate (TAC) film

GB/T 3492-217 Thermoplastic Elastomers-Determination of Halogen Content

GB/T 34845-217 Household paper - Determination of absorbable organic halogen (AOX)

HJ/T 83-21 Water Quality Determination of Absorbable Organic Halogens (AOX)

ISO 952-24 Water quality - Determination of absorbable halogen (AOX)

KS C7523-1999 Halogen bulb

NF EN 82-1994 Standard for measurement of extrusion temperature of tungsten – halogen – quartz lamp

QB/T 453-213 coated infra-red halogen heating tube

SN/T 319.1-211 Determination of halogen in electronic and electrical products Part 1: Oxygen bomb combustion-ion chromatography

SN/T 3185-212 Determination of halogen content in crude oil

T/CAS 318-218 Detection of polymer halogen content for wires and cables

The above is the relevant content of halogen detection compiled by Chuangxin Detection. I hope it can help you. Chuangxin Testing is a professional testing agency for electronic components. At present, it mainly provides integrated circuit testing services such as capacitance, resistance, connector, MCU, CPLD, FPGA, DSP, etc. Specializing in functional testing of electronic components, appearance testing of incoming materials of electronic components, anatomical testing of electronic components, acetone testing, X-ray scanning testing of electronic components, ROHS component analysis and testing. Welcome to call, we will serve you wholeheartedly!