water quality testing methods
What is the best way to seperate gold dust from sand/dirt?
I have found what looks like an abundance of gold dust. I need to seperate it from the sand/dirt so I can further test it for quality and authenticity. I have been trying the use of water without much success. I will accept any suggestions of a better method.
Test for gold with gold panning. See the link for instructions. If it turns out you found gold, most prospectors use sluices to remove gold in volume.
You do not need a bona-fide gold pan for the test. You should be able to fake it fairly well with a pie tin. You MUST have an oil free tin though. Don’t assume a new one doesn’t have oil on it. Wash it aggressively. Add a tiny amount of dish soap to the tin while you pan.
If you still have problems separating the gold with panning, it probably isn’t gold. Test your panning skill using small lead split-shot, flattened out. If you can separate the lead from sand but not the yellow stuff, it’s not gold 
water quality testing methods
Your Water Quality Report – Get the Facts
Public treatment facilities are required to provide homeowners with a water quality report, which is sometimes referred to as a consumer confidence report, on an annual basis. They may mail it to you or you may have to go online to view it. There are some things that these reports tell you and others that they don’t. One thing that they don’t do for informed consumers is inspire confidence.
Some of the things that you will see listed include chlorine or chloramines. These chemicals are used to reduce bacteria and to prevent algae growth in the pipelines. The maximum safe levels were determined through animal testing and then by extrapolating those results to determine what would be safe for consumption in an adult weighing 175 pounds or more. If it sounds like an inaccurate process, it is.
Another thing that you will see listed on a water quality report is the level of THMs measured at the facility. THMs are gaseous, cancer-causing by-products of chlorine and other disinfection methods. Testing for them is very difficult and the results listed on the reports are basically worthless. Since they are gases, their levels increase dramatically when the water is heated.
Water at the facility is cold. So, logically, there are far more THMs in the bathroom during a hot shower than there would be at the facility. That’s a big problem, because inhalation is far more hazardous than consumption, as is absorption through the skin.
There is really no way to determine a safe level of exposure to THMs. Scientists continue to publish reports concerning the increased incidence of cancer among persons that are regularly exposed to them.
The only way to protect yourself and your family from THMs is to install an effective filter on your kitchen tap and another in your shower. If you want to eliminate the source of exposure, you can install a whole house filter. But, you must do something.
The results of your water quality report may be skewed. Investigative reporters have found that facilities throw out results that are higher than average. They are not required to test for traces of prescription drugs, although some facilities do. When they do, they are not required to report the results to the consumer.
Another of the things that you will not see on a water quality report is perchlorate, a volatile organic compound or VOC. The EPA has yet to establish a maximum contaminant level for that. It is a naturally occurring element that is used to make rocket fuel and fireworks. It is known to cause damage to the endocrine system and is particularly hazardous to children.
It has been found in everything from lettuce to cow’s milk and infant formula. Independent testing found that is was present in nearly every public source nationwide.
Your water quality report will not list VOCs. But, they are listed on the product performance data for the best home filters. More than 99% of all traces can easily be removed. Do something good for your health and the environment. Install effective filters in your home today.
To become better informed about the available options regarding water filtration system you can install at your home, visit my website.
About the Author
Nicos Stylianou is a long time researcher and an expert on issues relating to healthy nutrition. To find information and what he recommends you should do to have healthy, pure water at your home, visit his website now at: http://www.your-nutrition-guide.com/pure-water.html.
What is the Winkler Chemical Method?
For a field study of a lake’s water quality, I tested dissolved oxygen levels using a test kit from Hach, which uses a modified version of the Winkler Chemical Method. Can anybody tell me what exactly is the Winkler Chemical Method?
Look up methods for disoved oxygen, or biochemical oxygen demand (BOD)and that should have all the details. But basically you convert all the oxygen in the sample to a form that can be titrated with sodium thiosulfite. I’m not a t work or I could give you all the details.
81 – Water Quality in South Slough Reserve
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