Instant copper content analiser in solids?
494583
A few years ago (1980s) a company was marketing a nuclear device for determining metal content of rocks.  This was a hand held device, and it worked very well.  I don't remember the manufacturer, but I know that it existed, and I saw it work.  The only problem was the nuclear source material.  In order to penetrate to any depth in the rock, it's nuclear source needed to be very powerful.  I think this was considered too much of a liability, and the company quit manufacturing the device.  I'm sure that you can still find one around.  I saw this demonstrated at a geologist's convention in Reno.  I think it was 1983 or 1984.
363070
Copper, Iron, Chromium, Aluminium
980626
ChemDraw from CambridgeSoft Corporation may be help you. Look at www.cambridgesoft.com
920352
Did you measure the absorbance of a standard in addition to the unknown sample?\n\nIf so, you could plug the values into (As / Au) = (Cs / Cu)\nWhere\nAs = Absorbance of the Standard\nAu = Absorbance of the Unknown\nCs = Concentration of the Standard\nCu = Concentration of the Unknown?\n\nAlternatively, did you get a value for the molar absorptivity of PNP at the wavelength you used? \nIf so, you could plug it into\n\nA = (epsilon)(b)(c)\n\nWhere\nepsilon is the molar absorptivity,\nb is the length of the path through which the light passed,\nc is the concentration of the chromogenic substance.\n\nAnd you could rearrange that to solve for c.\n\nHope it helps
723259
This lab involves putting iron (steel wool) into a solution of copper sulphate. The reaction produces metallic copper and iron sulphate solution. I've never been really sure if it's iron(II) sulphate or iron(III) sulphate as the product. I've used both equations with good results. \n\n   Fe   +  CuSO4   --->  Cu  +  FeSO4\n   2 Fe   +  3 CuSO4   --->  3 Cu  +  Fe2(SO4)3\n\n\nFor prelab, make up a saturated copper(II) sulphate solution\nTrust me. Otherwise, the kids will be filtering for hours.  \n\nHave containers available for appropriate disposal of reagents. And make sure they clean up all of the bits of steel wool from the lab benches. Those little bits will haunt you for weeks if they don't.\n\n\n\n\nMethod\n\n1. Obtain 100 mL of copper (II) sulphate solution in\n   a clean, dry beaker. \n\n2. Obtain about 10 g of steel wool. Record the exact mass.\n \n3. Place the steel wool into the copper(II) sulphate solution.  Stir with a glass rod. When the solution loses its blue colour, add more copper(II) sulphate solution.\n\n4. Continue stirring (and adding solution, if necessary)until the strands of steel wool are no longer apparent, and only particles of a reddish brown solid are visible.\n\n5. Record the mass of a piece of filter paper.\n   Place it into a funnel.\n \n6. Pour the mixture through filter paper in a funnel.\n   Rinse any residue in the beaker into the filter        paper      with distilled water. Rinse the solid in the filter paper with distilled water.\n\n7. Allow the solid and filter paper to dry, then find the combined mass.\n\n\nAnalysis\n\n1. If iron was the limiting reactant, predict the mass of copper which should have been formed. Show work.\n  \n2. Calculate the percentage difference between  the mass of copper predicted in question 1 and the actual amount of copper produced. Show all work.\n\n3. Discuss possible explanations for your results in question 2.\n\n\n\nGood luck !
425555
this depends on what you analysis is for.\n\nI presume you are using HCl and HNO3 (this mixture is aqua regia, and is an old mixture used by alchemists to dissolve metals) which would produce a solution containing metals contained in the flyash. This is the safest method.\n\nFurther analysis for getting rid of organics and further getting to the metals (flyash is made of coal) is also dangerous, as it uses H3PO4 and HNO3, this combination if heated is explosive so should be done by experienced chemists.\n\nNow... if you want to analyise the actual organic components in flyash then this beocmes more difficult as you now are dealing with highly complex organic structures... you should be careful with acid as it could destroy a lot of the flyash molecules. Such analysis is complicated, requiring many steps.
488112
http://chemistry.allinfoabout.com/features/nonmetals.html
85537
Hi Oldinway\n\n\nThe important alloys of copper and zinc from an industrial point of view are the brasses comprised within certain limits of zinc content. The addition of zinc to copper results in the formation of a series of solid solutions which, in accordance with usual practice, are referred to in order of diminishing copper content as the ?, ß,?, etc., constituents.\n\nThe copper alloys may be endowed with a wide range of properties by varying their composition and the mechanical and heat treatment to which they are subjected. For this reason they probably rank next to steel in importance to the engineer.\n\nThe important alloys of copper and zinc from an industrial point of view are the brasses comprised within certain limits of zinc content.\n\nThe addition of zinc to copper results in the formation of a series of solid solutions which, in accordance with usual practice, are referred to in order of diminishing copper content as the a, b, g, etc., constituents.\n\nThere is a certain connection between the properties and the microstructure which may be expressed in general terms.\n\nThe tensile strength increases with increase in zinc content, rises somewhat abruptly with the appearance of b, and reaches a maximum at a composition corresponding roughly to equal parts of a and b. It falls off rapidly at the appearance of the g constituent.\n\nElongation rises to a maximum and begins to fall again before the composition reaches the limit of the a solution. It falls considerably as the amount of b increases, and is very small in the presence of g.\n\nThe a constituent shows the greatest resistance to shock. This is diminished by the presence of b, and the alloy becomes extremely brittle when g is present.\n\nHardness is greatly increased by the presence of b and still further when g appears.\n\nAlloys containing a phase only are specially suitable for cold working, and may be hot- or cold rolled. Those containing a and b will suffer very little deformation without rupture in the cold rolling and may only be hot rolled. The b constituent may also be forged, rolled or hot extruded, but alloys containing g should invariably be avoided for any mechanical treatment.\n\n\nDesignation system of brasses\nThe brasses of industrial importance are often designated by their copper and zinc content.\n\nC 23000 - Red Brass (85 Cu, 15 Zn)\nThis alloy is used for ornaments and for cheap jewellery which is to be gilded: it withstands cold-work, cupping, etc. On account of the range of solidification, the cast material has a dendritic structure.\nIf cooled very slowly or annealed, diffusion takes place, yielding polyhedral grains of uniform composition. The process of diffusion is assisted by mechanical deformation of the grains by hot- or cold work followed by annealing. The changes which occur in rolling and annealing are similar to those described for 70:30 brass.\n\n\nC 26000 - Cartridge Brass (70 Cu: 30 Zn)\nThis alloy, which is used widely for tubes, sheets and wires, also shows a dendritic structure of the a solid solution when chill fast. The b constituent does not begin to appear in the cast structure until the zinc exceeds 32% except in the presence of an additional element like aluminum or tin.\nAfter annealing, the alloy consists of homogeneous solid solution, and it is specially suitable for cold-working. To withstand this treatment, especially drawing, it is necessary that the brass should be perfectly sound and free from impurities.\n\nSince high grade 70:30 brass is usually made from the purest copper and zinc available without admixture of any but the cleanest scrap, these impurities are chiefly inclusions of dross (oxides or silicates) or charcoal. Such inclusions, if present, frequently lead to failure of the material during manufacture or in use. They become entrapped in the solidifying metal, either by splashing or by rapid solidification in moulds of small cross section.\n\nIt is a frequent procedure in casting brass to
1142591
Just get a blood test and send the sample to the very few labs that measure that kind of metals.
83605
go to www.chemfinder.camsoft.com you can find that and so much more
413983
Copper sulphate as I recall.
671681
You are looking for element #29 - Copper (Cu).
622582
As no one else has had a go, i will. \n\nCellulase should produce glucose, so you are needing a method to analyse the amount of glucose formed. \n\nIf you have access to a blood glucose monitor, this would be the simplest way. Otherwise, the reaction between glucose and Benedicts solution is quantitative, and you could weigh the amount of Cu2O formed.
888667
Cu2S + 12HNO3 -> Cu(NO3)2 + CuSO4 + 10NO2 + 6H2O\n\nThere you go.
446562
Flip them. If they ring, they are pre-1981. Alternatively, drop them one by one onto a hard floor. Again, if they ring, they have the higher copper content.
970639
Read what it contains
999393
Most common method would be an oxidative digestion (most likely using ultraviolet radiation) in order to eliminate the organic matrix, and subsequent simultaneous ICP-OES analytics. Numerous other detection methods are available (electrochemistry, mass spectroscopy, atom absorption spectroscopy, even classical wet chemistry might give satisfactory results if done with extreme care and insight).\n\nThe heavy metals would be the usual suspects also monitored in drinking water, with special emphasis on any material used or present as impurity in the packaging (tin, lead, cadmium, zinc...)