testing platinum with muratic acid

Does testing acid go bad or do I just have horrible luck ...

So I drop a bit of the silver test acid, a mixture of nitric and muriatic acid, percentages unknown, onto the bar where it is initially reddish brown but fades to a bluish gray over the course of twenty seconds or so. I try it again and get the same result. When washed off a pale mark the size of the acid …

"Gold Recovery for Dummies?"

Aqua regia - Mix one part nitric acid to 3 parts hydrochloric acid. OR 2b. To the container, add 30 milliliter of nitric acid for every ounce of metal. To the container, add 120 ml of hydrochloric or muriatic acid for every ounce of metal in the container. 3. Allow impure gold to dissolve for an hour to overnight for complete dissolution. 4 ...

How long do the acids in gold testing kits last? - Quora

Answer (1 of 2): This is a bit out of my field but they should last until they react with something. I assume your acid is in a plastic bottle, or perhaps a glass one? You did not say what kind of gold testing kit you had or what you were trying to analyze with the acid but there are two things I...

Instructions for Scratch Testing Gold, Platinum & Silver ...

Place a drop of the 10K solution to the scratch made. If the solution dissolves the scratch on the stone. it means the object is less than 10K gold or not gold at all. If the, solution leaves the scratch intact, it means the object being tested is 10K or greater than 10K. The scratching and testing is …

All disks contain platinum | Gold Refining & Metal ...

It takes about three hours after cleaning all them hard drives muratic acid make for sure you got a lot of scratch in ur disk on both side the acid burns out the aluminum out of the mid then yu ake the small peices put them in a blender with water blend them the a smaller peices them use sub zero ura and storm to extract the other metals that ...

How to Make a Gold Test Acid Solution | eHow

Professional jewelers and jewelry appraisers often use gold acid tests to determine gold jewelry's value. Different acids react differently when dripped on specific base metals, allowing you to tell how pure your gold is. Since gold is so soft, most gold jewelry today is made of an alloy of some kind.

How to make HCL 4% solution (MMS activation) - Solution ...

HCl is known as Muriatic Acid or Hydrochloric Acid. Recommended approach: Purchase a 4% solution from someone who knows what they are doing. Stronger HCl solutions is dangerous stuff. Precautions to those who know what they are doing and decide to dilute the HCl themselves: Use gloves and eye protection. Make sure there are no bases in the area.

Chemical tests for the metal content of various ores

Platinum: Platinum is a most refractory metal to treat, as it must be boiled for at least two hours in the mixture of muriatic and nitric acid, known as aqua regia. A small amount of alcohol is to be added to the solution, and the latter filtered. The platinum is precipitated with ammonia chloride.

Confused about "acid test" for silver and other precious ...

Aqua regia is a mixture of 75% Nitric and 25% Hydrochloric (Muriatic) acid, as correctly pointed by Chemical Engineer. However it is used for refining gold not for testing it. Mark Landa - New York, New York ^ ... Silver, and Platinum testing kit with the acids...the supposed "stone" was a piece of glass that I received chipped, the Platinum ...

what color will gold turn muriatic acid - BINQ Mining

Shor International – Refining Gold From Circuit Boards …. The acid used in this process is muriatic …. If any gold is still dissolved in the acid, the wet spot will turn a purple …. Rinsing the pure gold: The acid …. » More detailed.

Chemical Compatibility of the Tubing Materials

Platinum Silicone Peroxide Norprene A-60-G Flurane F-5500-A (Viton) 1: excellent; 2: good; 3: fair; 4: not recommended Acetaldehyde 4 4 4 4 3 3 3 4 4 Acetamide, 67% in w 4 4 2 4 1 1 1 2 4 Acetate Solvents 4 4 2 4 4 4 4 2 4 Acetic Acid, 10% in w 1 1 1 1 1 1 1 1 4 Acetic Acid, 50-60% in w 1 1 2 1 1 1 1 2 4 Acetic Acid, Glacial, 4 4 2 4 1 4 4 2 4

Easy Ways to Test Platinum: 8 Steps (with Pictures) - …

Watch for the acid to react with the metal on the stone. If the metal dissolves immediately in the acid, it is not platinum. Platinum will retain the same color and brightness underneath platinum testing acid. Make sure the acid is at room temperature (around 72 °F (22 °C) or lower).

Gold, Mining and Prospecting: A simple test for gold

Hydrochloric acid is sometimes called muriatic acid when it is in dilute form. The dilute acid can be used as a simple test for gold. Sometimes it is a case of not being able to see the forest for the trees, and sometimes I am guilty of this fault among the many others I have.

Metal, Iron, & Nickel | Some Meteorite Information ...

The manufacturer of the test kit is not likely to suggest this work-around because hydrochloric acid is very corrosive and is likely to ruin jewelry and other metals if used incorrectly. (I rinsed the meteorite in much water after the test.) I tried the test also on a sawn face of an ordinary (H group) chondrite and also obtained a positive result.

| Shor International

Shor International sells tools and supplies for precious metal refining, jewelry making, silversmithing, polishing, weapons cleaning, and much more.

How to Test Silver at Home | Learn to Spot Fake Silver

Acid Test. The most accurate test, it will require you to buy test acid for silver. The acid itself is usually a mixture of nitric acid and muriatic acid. So be careful with the acid solution and make sure to wear gloves and eye protection. Some people try to save money by using vinegar instead of acid but vinegar won't give you accurate results.

Meteorite Home Tests

Caution should be taken when acid is used in the test. Helpful info on using this test. Note: Samples passing this test might be meteorites. Warning:(1) slag can test positive and (2) R. Korotev relates "if the pink color fades away after 5 minutes, then the metal contains Ni, …

How to Test Gold, Silver and Other Precious Metals.

How to Test Gold, Silver and Other Precious Metals. To start, make three test solutions as follows: Bottle #1: Schwerter's Testing Solution - Mix 1 gram of Potassium Dichromate with 22ml of concentrated Nitric acid and 8ml distilled water. Bottle #2: Mix 1 part (by volume) Hydrochloric acid and 50 parts of Nitric acid. Add to 12 parts of distilled water.

How to Test Gold With Muriatic Acid | eHow

How to Test Gold With Muriatic Acid By Raul Avenir ... Muriatic acid is a very strong corrosive chemical that can damage surfaces; avoid spilling the chemical onto other items. Advertisement Step 3 Observe the reaction of the gold once the muriatic acid comes in contact with it. If the metal dissolves completely, then it isn't gold.

OSHA Respirator Requirements for Selected Chemicals ...

Revisions to the OSHA Respiratory Protection Standard (29 CFR 1910.134) became effective on April 8, 1998. Incorporated within the preamble of this ruling were changes to OSHA regulations for several chemicals or substances, which are listed as subheadings in blue text throughout this appendix.

How To Test Gold - Gold Testers - Gold Testing - Gold Test ...

To test for the karat value of gold, platinum and silver, you will need the following materials and tools: - Black acid testing Stone that is washed thoroughly with water prior to each test. - Acids - Gold testing needles with gold tips used for comparison with test pieces. All above Gold Testing items are available from Star Struck, LLC as ...

Gold and Silver Testing Acids - Gold Testing Supplies ...

Contains nitric acid and muriatic acid. 1/2 fluid ounce per bottle; Procedures for testing Gold, Platinum, and Silver. Materials. To test for the karat value of gold, platinum, and silver, you will need the following materials and tools: Black acid testing stone that is washed thoroughly with water prior to each test. Test …

Test etching concrete with muriatic acid. - YouTube

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Hydrochloric acid | Muriatic acid | Muriatic acid ...

Aqueous hydrochloric acid attack and corrode nearly all metals, except mercury, silver, gold, platinum, tantalum, and certain alloys. It may be colored yellow by traces of iron, chlorine, and organic matter. Muriatic Acid test for carbonate minerals and carbonated rocks

Materials Safe for Muriatic Acid Cleaning - Bright Hub ...

Muriatic Acid is a solution of Hydrogen Chloride (HCl) in water, also known as Hydrochloric Acid or Fuming Hydrochloric Acid. The general applications and uses of muriatic acid are mostly found in the pharmaceutical, food, petroleum and metal industry. Muriatic acid is suitable for cleaning concrete, masonry, ceramics, tiles, bricks etc. It will attack most of the materials it touches ...

How to test your gold. Is your gold real?

The first step in testing gold is always the magnet test. If the item attracts to a magnet even just slightly it is not real gold, silver, palladium or platinum. These precious metals are non-ferrous meaning they are not magnetic. If your item is magnetic it means there is no reason to test it with acid.

Identity Help : What kind of pyrite is this?

I have a acid testing kit now and the pyrite I have does not dissolve in nitric acid at all. I heated it and didn't know what temp to go to but saw no results. I know muratic does nothing. The kit I have had a platinum acid test that was aqua regia.

How To Test Sulphuric Acid - ChestofBooks.com

A simple test for this purpose is of great advantage, and the following method will be of some use in places where no chemist is employed: A small portion of the sulphuric acid is evaporated on a platinum sheet, which is subsequently brought to a red heat. Good sulphuric acid should not leave any residue; if there is any, it is generally sulphate of potash, or soda, or even lead.

How to Use Bleach on Gold Ore to Remove Gold | Sciencing

Pour the acid-and-bleach mixture into the plastic bowl with the ore grains and stir. Allow four hours for the gold to dissolve, stirring every 20 minutes. The chlorine reacts with the gold inside the ore to form gold chloride. Filter the ore and bleach solution to …

CHEMICAL RESISTANCE CHART

Chromic Acid 10% B A DA D C Chromic Acid 30% B A DB A D Chromic Acid 50% CB A DC AB D Cider ABD A Citric Acid ACAD B B D Citric Oils ACB A D Coffee AB C A Copper Chloride C D B A A Copper Cyanide AD A CB B Copper Fluoborate D B AB A Copper Nitrate B AD A Copper Sulfate (5% Solution) AD AB C Copper Sulfate B ACD AB Cream ACD A Cresols2 AB DC C A ...

How To Test Silver - Silver Testing - Test Acids For Silver

- Black acid testing Stone that is washed thoroughly with water prior to each test. - Silver Test Acid Silver Test Acid is available from Star Struck, LLC as part of a Deluxe Gold Testing Acid Kit. Testing For Silver Place a drop of acid on the object to be tested. 90 to silver, the acid will show a creamy color. 77-90% silver, the acid ...

Aqua regia - Wikipedia

Aqua regia (/ ˈ r eɪ ɡ i ə, ˈ r iː dʒ i ə /; from Latin, lit. "regal water" or "royal water") is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. Aqua regia is a yellow-orange (sometimes red) fuming liquid, so named by alchemists because it can dissolve the noble metals gold and platinum, though not all metals.

Chemical Compatibility Chart

- Acid nitric HNO3 - Acid mixed (nitric/sulphuric) HNO3 + H2SO4 - Acid, sulphuric 70% to 90% H2SO4 above ambient temperature - Acid, oleum H2SO4 (Nordhousen, fuming sulphuric) For further definitive information, we recommend contacting the chemical supplier or at least testing samples under actual service conditions.