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You are able to not go one day without putting your life in the hands of something made of metal. Whether it is the bridge you have to cross every single day on the method to work, the steel girders holding the roof above your head, or the parts holding your vehicle together, metal is an integral part of the present day world, and it is of utmost importance that it is of the highest standard.

As well as the lifesaving aspect, what about the aesthetic part of metal use? use? How can you know that the 22 Carat ring you just bought is really of such a good quality, and perhaps not just a dud?

This is where chemical testing is available in. Chemical tests can be used to assess the purity of a metal, permitting determination of the strength of a bridge, or the quality of jewellery. Two types of chemical testing are discussed in this essay: the salt spray test, and ICP analysis.

The Salt Spray Test is used to examine specially coated metals for his or her corrosion resistance. It is a form of accelerated corrosion used to predict how suitable a certain coating will be at preventing corrosion. The material in question is sprayed with salt, and the time taken for oxides to seem on the surface of the metal is recorded; the more corrosion resistant the material the longer it may need for oxides to seem. This test is quick and easy to do but is not totally accurate, as corrosion is just a complex process involving many interfering factors. Nevertheless this technique is normally used in business to produce an estimate of a specific substance's expected corrosion resistance as time passes.

Inductively Coupled Plasma Mass Spectrometry (or ICP analysis) is an approach used to determine the concentrations of chemical elements in an example. This strategy provides you with a notion of the purity of your stuff, as well as an indicator of which contaminants may possibly be present. It works by ionising the material in question by use of inductively coupled plasma, generated by powerful magnets, and then using mass spectrometry to analyse the substances present. [ StarsWithStripes.Org :: Technology for Democracy]

Carle Zhengding violations of Barrios was booked .

The people of Shuyangnetwork news  :Beijing time on October 2nd 20, Guangzhou Hengda home in the Tianhe Sports Center with Al-Ittihad unfolding AFC Champions League knockout round against 1/4 .
Barrios nineteenth minutes low shot ,card thirty-fifth minutes will Gao Lin make scored card  ;sixty-second minutes in the column, Al Ittihad Seventy-eighth minute counter-attacks ,Hengda although 2-1 win, but missed the final two round 4-5 quarter-finals .
Gao Lin and the golden ying-quan slumped down rival 2-4 first leg defeat ,they must take the main attitude .Muriqui missed because of injury ,Lippi played in 352 formation, Zhang Lin ,Feng Xiaoting and Jin ying-quan led his lines, Gao Lin and Barrios play with two strikers ,air jordan pas cher.
The first real main attack carried out ,second minutes ,continuous with the rival ,Zheng Zhi restricted area near the line of the left foot volley dangchu bottom line .In fifth minutes ,Barrios won the 30 meters outside the free kick ,punch card directly hit the door Zayed was confiscated .
1 minutes later ,card right rib after the get-away left foot long-range by Zayed worked out of the beam .In twelfth minutes ,michael kors,Zhang Lin in blocking the opponent straight ball when the errors ,moncler,but their get-away players offside in first ,Shalby ,sneaks in the ball but invalid .
Rival after continued to dominate possession ,,but in their tight defense the opportunity not to be many .Until fifteenth minutes ,Hengda midfield counter-attack, card box front turn horizontal pull left foot hit the far angle to partial out .
In Eighteenth minutes ,Long Feng Xiaoting play up front, Gao Lin header ferry ,Al Ittihad guard breaks through to Barrios ,the latter into the restricted area arc near the left foot in anger over time shooting beams .
In nineteenth minutes ,Hengda hair left out-of-bounds ,Gao Lin got the ball on the left side of the penalty area cross ,Barrios caught the ball out of defence and play near the light angle ,rubbing a ball on the left column rolled into goal ,air jordan,leading rival 1-0 ,the total score to 3-4  !After scoring a rival continue to opponents .
In twenty-third minutes ,abercrombie france,Gao Lin won the 25 meters free-kick ,Qin l take directly hit the door Zayed was confiscated .In twenty-fifth minutes ,Carle Zhengding violations of Barrios was booked .
In thirty-second minutes ,Al Ittihad counterattack in the door to play Li Shuai was confiscated .In thirty-fifth minutes ,Hengda long pass counter-attack ,Gao Lin by Ahabi Lane from the shovel ,the referee penalty in korea  !Card hit near angle ,Zayed judged to be beyond one the direction of the ball but ,abercrombie and fitch,enter the dead ,rival 2-0 lead ,and the total score to 4-4 level ,at the same time have two away goal advantage .
In thirty-eighth minutes of Montana tackles Feng Junyan yellow ,card direct free kick hit the door by goalkeeper letter .Forty-first minutes ,to send to the right corner is cleared punch card .
During forty-second minutes to adjust ,had licensed the Tukar was replaced by Ahmad .Forty-fifth minutes before the forbidden area ,abercrombie paris,Feng Xiaoting sentenced foul tackle dyed yellow, Hengda player challenge ,.
The final end of the half,, rival with Barrios and card goal lead 2-0 ,.Edie Harder the second half beginning is adjusted ,moncler,the first round scored 2 goals out Hazaz .In forty-eighth minutes ,Gao Lin on the right lane line spread ,Jun Hiko header to wipe out the bottom line on the left column .
In fifty-first minutes ,card smart ball, Gao Lin the left side of the penalty area small angle with the keeper roll radio confiscated .In fifty-eighth minutes ,Al Ittihad counterattack in the cross area ,hazzards follow-up hit the door by Li Shuai is obtained .
Sixtieth minutes after the break ,air jordan pas cher,Barrios left heel cross before the door caused Zayed to save error, Gao Lin back cross ,,follow the card was tuishe Montana sand block .In sixty-second minutes ,Zheng Zhi the right breakthrough at the end of the next pass blocked ,rival to peripheral tissues ,card top up far outside shooting the left upright post pop-up ,Hengda the field second times hit the post .
Card block the opponent quick free kick dyed yellow,abercrombie france, Hengda seventy-second minutes were the first adjustment ,replaced by Li Jianhua Feng Junyan .In seventy-sixth minutes ,Zhao Xuri played for Barrios .
In Seventy-eighth minutes ,,Ibrahim - after passing through to the front road hazzards ,hazzards to header ferry ,on the right side of the area follow the Massoud beat gold ying-quan plugging front door, bounced to rub the right column to enter the goal ,their scores a goal and to lead 5-4 total score .
In eighty-fifth minutes ,moncler pas cher,Zheng Zhi restricted area before the ball into the restricted area on the right side ,michael kors outlet,Gao Lin and Qin l hit after toe poke one-two with the keeper regret missed shot .
The final stage of rival to pressure but no chance to score ,but eventually rival 2-1 win total 4-5 .Guangzhou Hengda line-up: 22- Li Shuai /5- Zhang Lin ,6- Feng Xiaoting ,28- gold ying-quan /7- Feng Junyan (72&#39  ;14- Li Jianhua) ,8- ,10- Zheng Zhi ,Qin L 15- card ,4- Rong Hao ( 81&#39  ;21- Jiang Ning ) /29- Gao Lin ,18- Barrios ( 76&#39  ;37- Zhao Xuri) the Tihad line-up: 1- Mubarak Zayed /4- Carle ( 42&#39  ;29- Ahmad) ,doudoune moncler pas cher,21- Hamm - Montana sand ,5- Wusamu - Al Habib ,50- Ibrahim ,14- /7- m-bami hazzards Su Ade Kariri ,23- Abu - sand Baan ( 46&#39  ;9- hazzards ) /10- Sosa ,18- Mohamed Nur ( 69&#39 ,air jordan;8- Massoud /13- Shalby .
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