1. AXR Scientific Instrument(Hangzhou) Co., Ltd. PRECIOUS METAL AND JEWELRY TESTING WITH HANDHELD XRF ANALYZER

2. AXR Technology Is Ideal for GOLD and Jewelry Analysis Contents Introduction of AXR Scientific 1 Introduction of Terra900 Series 2 Contact Information 4 Gold and Jewelry Analysis 33

3. Introduction of AXR Scientific

4. AXR Scientific currently offer handheld XRF analyzer, handheld alloy analyzer, handheld soil analyzer, handheld lithium battery analyzer, precious metal analyzer, coating analyzer, gold analyzer and online XRF analyzer etc. to global customers. We keep serving global customers in the fields of machinery manufacturing, metal processing, aerospace, petrochemical, mining and geology, food safety, environmental protection, scientific research and etc.

5. Terra900 HH XRF ANALYZER INTRODUCTION

6. Terra900 HANDHELD XRF ANALYZER QA/QC for fabrication Scrap metal recycling FAC(Fluid accelerates corrosion) Precious metal analysis PMI(Positive Material Identification) Coating analysis AXR Terra900 series are good choice for metal analysis in many fields, delivering rapid, accurate results right in your hand. Due to the advanced electronics and state-of-the-art mathematical algorithms, Terra900 series provide ultimate quality of measurement within a couple of seconds, which makes it the ideal solution for checking and analyzing incoming material, finished goods and in process production parts with a non destructive way. With operating simplicity, you can view the alloy grade and chemistry on the touch screen display with just a few seconds to obtain lab-quality chemistry, requiring minimal training and little or no sample preparation for all shape and size of sample.

7. Why Terra900 Is Ideal for Alloy Analysis? Fast Results in Seconds Terra 900‘s algorithm perfectly combines powerful fundamental parameters method (FP).With a triggering, the alloy grade can be identified within 1-2 seconds, and laboratory-level analysis results can be obtained by extending the testing time by a few seconds. Unlike destructive testing, samples remain undamaged by X ray.. Easy to Operate anywhere anytime Ergonomic design, light weight, small size with good balance. Large capacity of battery ensures work for 10-12 hours for onsite testing without worrying recharging. Minimal Cost of Maintenance Rugged design with IP54 standard dustproof and waterproof. Working continuously and normally in the temperature of -10°C to 50°C, solid enough to address environmental challenges on site. User Friendly Software 5.5-inch color touch screen with backlight function, clear to see in the sunlight, available for operating the touch screen wearing gloves. Up to 100,000 test results storage, including spectrograms and sample images Easily to transmit results and reports to PC Optional sample camera function is also available for accurate test positioning Accurate Results High-performance AXR x-ray system design with Si-Pin detector or high- resolution, high-sensitivity SDD detector and advance algorithm deliver the accurate elements analysis results you can trust. With a unique library of 1600 alloy grades, AXR Terra900 series provide superior accuracy in grade identification. Terra900 Features

8. Advantage Excitation Display Small Spot Grade Library Fingerprint Function High-performance 4W micro X-ray tube, 50kV/80μA, wider detection range of elements, especially more sensitive to heavy metals Large-size capacitive smart touch color LCD screen (5 inches), the display is clearer and convenient for users to operate Small spot mode (1mm) easily solves the problem of small sample testing With the most comprehensive grade library, including AlSI, DIN, JIS and GB grade libraries, covering more than 1600 alloys. Users can modify the existing grade library, add new grades or customize grade library. The fingerprint pattern is matched with the previously selected comparison fingerprint. If the result is consistent, it will show a pass (PASS), and if it is inconsistent, it will show a failure (FAIL).

9. Specification and Performance ModelTerra 900 Excitation High performance 4W X-ray tube with Ag anode,50kV/80μA （ max ） DetectorHigh performance Silicon detector, Resolution<140eV FWHM at Mn Ka FilterMulti position automatic filter changer Componentsi.MX 8M Mini Quad Core 1.8GHz, DP5 DSP, 80 MHz ADC DSP, 4096 Pixel Multichannel Analyzer, DDR4 2GB WindowKapton window and anti-puncture window optional Collimator3mm collimator DisplayCapacitive touch color display (5 inch 720P) Battery 7.2V Li-ion battery ， 6800mA Elements Ti 、 V 、 Cr 、 Mn 、 Fe 、 Co 、 Ni 、 Hf 、 Ta 、 Re 、 Cu 、 Zn 、 W 、 Se 、 Pb 、 Bi 、 Zr 、 Nb 、 Mo 、 Pd 、 Ag 、 Sn 、 Sb 、 Mg 、 Al 、 Si 、 P 、 S etc. and can be customized One touch testingWhen measuring soil samples, the "one-button test" mode can be selected to avoid the operator pulling the trigger for a long time and relieve work fatigue Data storageautomatic sorting and naming of soil detection and analysis results in different regions Radiation safetySafety guard device, tube shutoff while no sample Structure designThe integrated design of engineering plastics and aluminum alloy is in line with the best ergonomic principles; the internal unique super heat sink design Data transfer WiFi 、 USB Data safetyMulti lever Password-protected data security

10. Analyzer and Accessories Packing Slip 1Analyzer 2Plastic case 3Battery charger 4Adapter 5 Li-ion battery （ 2) 6Type-C cable 7Memory stick 8 Window film （ 2 ） 9Wristband 10Standard QC report Certificate 1 8 2 9 10 5 4 3 6 7

11. Software Features Simple and easy to useComprehensive Grade LibraryFingerprint Matching Function

12. Accessories ITEMQTY Carbon fiber puncture- proof window 1 Backscatter shield1 Portable stand1 Bench stand1 Camera1 ITEMQTY Window film2 Waterproof and shockproof case1 Li-ion battery1 Battery charger1 Adapter1 Wristband1 32G memory stick with software1 AXR1.0 software/ Digital user manual/ Type-C cable1 Standard1 Standard accessoriesOptional accessories Carbon fiber puncture-proof window Standard test stand Backscatter shield Portable test stand

13. Test Stand and Backscatter Shield Proper use of the test stand can effectively shield scattered radiation Use bench top test stand: Hold the analyzer and align the analyzer window with the bottom window of the test stand, push upward. After hearing a "click" sound, the instrument is fixed in place, put the sample to be tested into the analyzer window, and cover the box to start testing.

14. Optional Accessories Bench-top Test Stand Allows hands-free measurement of samples. Completely shielded to protect the operator from any scattered radiation. Portable Test Stand Folds up for easy transport and portability. Allows hands-free measurement of samples. Completely shielded to protect the operator from any scattered radiation. Backscatter Shield A flexible and robust shield attaches to the analyzer’s cone, protecting the operator from any backscattered X ray during analysis. Carbon Fiber Anti-Puncture Window Carbon fiber anti-puncture windows can be used to effectively protect the window film from damage by irregular samples testing.

15. Operation Instructions Keep the detector window safe during use. As one of the core components of the instrument, the detector is mainly used to receive X- fluorescence signals and distinguish them according to different energies. The window of the detector is metal Be, and the interior is a vacuum part. The thickness of the Be window is about 13um. If it is damaged by external force, it will be irreversible. Be careful not to drop it during use. When you go out to work, tie the wrist strap to prevent damage to the screen of the instrument or damage to the internal components of the instrument. The instrument will generate a certain amount of X-rays, which should be used in accordance with the instructions for use of the instrument. When storing and using the instrument, try to avoid being too close to strong magnetic fields. Strong magnetic fields can affect the life of electronic components.

16. APPLICATONS FOR GOLD AND JEWELRY WITH HANDHELD XRF

17. The content of main elements in precious metal jewelry directly affects its quality, appearance and maintainability, and has a significant impact on its production, sales and purchase. The basic price of precious metals is high and the weight is small. The fluctuation of the raw material market price will lead to significant changes in production costs and sales prices. It can be seen that the production, sales and consumption of precious metal jewelry have a high demand for accurate quantitative analysis of the content of precious metal elements. For on-site identification of precious metal quality, there are traditional methods, such as weighing and calculating density, observing color and lustre, and hardness testing. These on-site identification methods rely on experience, and even if they are experienced, they may be misjudged and have poor reliability; accurate analysis can be done in relevant identification agencies, but the timeliness is poor.

18. Why Terra990 Handheld XRF Analyzer Is the Good Choice for Jewelry Testing? With the Terra 990 Handheld XRF Analyzer, accurate quantitative analysis of precious metal elements can be achieved. The instrument has good performance, easy operation and easy to read results. At the same time, Terra 990 is non-destructive testing, which avoids the possible impact of testing and analysis on the appearance and performance of the gold and jewelry to be tested. The Terra 990 Handheld XRF Precious Metal Analyzer provides a complete solution for elemental analysis in the production, sale and recycling of precious metal products. The instrument is equipped with a high-performance X-ray excitation device and Si-PIN detector, which can achieve accurate quantitative analysis. Customers can also choose a silicon drift detector (SDD) to improve the resolution of the instrument and reduce the time required for analysis.

19. Features of Handheld XRF Analyzer Terra990 for Precious Metal and Jewelry 1.Fast and accurate: Fast, accurate and reliable analysis, the analysis results can be displayed in seconds; 2.Intuitive and easy to use: Large-size high-definition touch screen, graphical interface, and the test results are intuitive and clear; 3. Safe and non-destructive: An automatic radiation protection device is installed to protect the safety of operators, and the detection does not damage the appearance of precious metal samples; 4. Simple and lightweight:. No need for much training, easy to operate. Compact design for easy portability without any sample preparation. 1.Fast and accurate: Fast, accurate and reliable analysis, the analysis results can be displayed in seconds; 2.Intuitive and easy to use: Large-size high-definition touch screen, graphical interface, and the test results are intuitive and clear; 3. Safe and non-destructive: An automatic radiation protection device is installed to protect the safety of operators, and the detection does not damage the appearance of precious metal samples; 4. Simple and lightweight:. No need for much training, easy to operate. Compact design for easy portability without any sample preparation.

20. The quantitative analysis of the Terra 990 handheld XRF elemental analyzer is realized by the Fundamental Parameter (FP) method. The quantitative analysis accuracy of the Fundamental Parameter method is good, and in the calibration work of the subsequent analysis, there is no need to use additional standard samples. The empirical correction method has higher analysis efficiency in practical applications. According to the quantitative analysis results of gold (Au) and silver (Ag), we perform linear fitting with the actual content and measured values of the elements as the horizontal and vertical axes respectively: Fundamental Parameter (FP) method of Handheld XRF Analyzer for Terra990 Made by AXR Scientific The results show that the instrument can accurately reflect the actual content of elements in different samples, and has good on-site analysis ability.

21. In order to test the stability and repeatability of the Terra 990 handheld XRF elemental analyzer, we selected standard samples containing gold (Au), silver (Ag), and palladium (Pd) three precious metal elements for 10 tests, each test time It is 30s (data units are all percentages), and the test results are compared with the sample data: How about the Repeatability of the Handheld XRF Analyzer for Gold Testing The test results show that the analysis results of the Terra 990 handheld XRF elemental analyzer are stable, accurate and repeatable, and the reliability of the instrument is good.

22. AXR Scientific selected three different types of gold bracelets from three well- known national gold jewelry brands: pure gold (gold content not less than 99.9%), pure gold (gold content not less than 99%), rose gold (gold content not less than 99%) at 75%), and then analyzed it using a Terra 990 handheld XRF elemental analyzer with the following results: How about the Repeatability of the Handheld XRF Analyzer for Gold Testing

23. The results show that the Terra 990 handheld XRF element analyzer can accurately detect the content of precious metal elements in jewelry, and can be used as an on-site analysis tool for precious metal jewelry quality control, identification and trading. At the same time, Terra 990 can also provide customers with scientific pricing basis in the production, sales and recycling of precious metal jewelry. For more details, please visit the company's website or call for consultation. How about the Repeatability of the Handheld XRF Analyzer for Gold Testing

25. Non-destructive nature: The alloy isn`t affected during the test, which means that it doesn`t lose its commercial value. Fast and accurate research: It takes only a few seconds to get the result that will display the grade and elements concentration of the components. Safety: Firstly lower exposure to x-rays. Secondly, an alloy analyzer has several safety protection to minimize the impact. Advantage for Handheld XRF Analyzer for Precious Metal

26. Contact Information AXR Scientific Instrument(Hangzhou) Co.,Ltd. Qingshanhu Street Lin'an District, Hangzhou City, Zhejiang Province, China 311305 Email: sales@axr-scientific.com Phone:+86519-83550835 https://www.axr-scientific.com

27. AXR Technology Is Ideal Choice for Precious Metal