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Jewelry

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Application Solutions to Simulated Jewelries

Create Date:2016/7/4 8:34:42  Click:2657

1:Simulated Jewelries:

K-gold, gold plated, silver plated and etc are known as simulated jewelries.
The simulated jewelries market is uneven, some good and some bad; some jewelries of relatively cheap price and un-known composition may cause allergic symptoms; to “nickel allergy”, “lead poisoning” and other skin diseases, many wears do not know them.
In the USA, EU and other counties and regions, there are strict restrictions on the toxic substances of simulated jewelries, especially simulated jewelries for children. CPSC of the US requires the lead content is less than 600ppm/kg, and EU also has a strict restriction on nickel content.
In January 2007 to November, because of lead content in jewelries for children excessively out of the standard, the US Consumer Product Safety Association asked to recall jewelries made in China 27 times and 5,820,200 pc in total.
In 2009, China’s first draft of “limit requirement and test method for hazardous substances in simulated jewelries” was approved and implemented.

2:Application Solutions:

In accordance with “limit requirement and test method for hazardous substances in simulated jewelries” and restrictions made by the US and EU countries and regions, our company has devoted all its energy to providing the simple, practical and tailor-made solution to manufacturers: XRF spectrometers detection, the only method which can rapidly and non-destructively test the hazardous substances; one equipment is enough to test the simulated jewelries.

3:Applicable Instruments

Model:SUPER EDXRF 1000

Performances and Characteristics:1. 1. Skyray patent technology----special excitation X-ray source, sample excitation structure and detection system; greatly improve the detection sensitivity( lower detection limit) 2. Modern figure, color and structure; electric control upper cover is more ergonomically; 3. Auto switch of collimator and filter can meet different analytical requirements; 4. Large-capacity sample chamber and high-resolution CCD ensure the easy operation; 5. Equipped with software of full functions.

Application Examples

Test of Pb in metals (gold-plated copper alloy)

1. Measurement parameters

Anode: Zr anode
Measurement conditions: 45kV/600uA
Testing time:200s
Standard sample:Alpaka 313(Pb:60ppm)
Test spectrum
The spectrum shows fine copper rc101(Pb,0ppm); the red reference spectrum is alpaca 313(Pb:60ppm).


The average values and relative deviations of multiple measurements.
2、Test data


The spectrum below shows the work curve of Pb in Alpaka:

Slope of the work curve:tan0.21=0.0036
Detection limit of Pb in Alpaka 313(Pb:60ppm):(3×0.013)/ 0.0036 (slope of the work curve)
=10.8ppm

 

Test data:


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