Silver content in X-ray film and Fixer and Hypo Solution
Last week I received lot of mails regarding Silver content in X-ray film and Fixer and Hypo Solution. Well, when we talk of silver content in x-ray films and fixer and hypo solution, we must first understand about how many types of x-rays we have. We get two types of x-rays from hospitals and scrap dealers. That is bone and chest x-rays. From bone x-ray films we get about 10 to 12 grams of silver per kg. Whereas from chest x-rays we get around 5 to 7 grams of silver per kg. Normally we get mixed lot of x-rays from x-ray clinics or scrap dealers. In these lots the bone x-ray is around 60 to 70% or sometimes even 80% and the ratio of chest x-ray is around 30 to 40% we can determine the per kg silver content in x-rays by assessing the right percentage of both chest and bone x-ray in the mixed lot.
As for determining the silver content in fixer and hypo, it is very easy we have silver estimator available in the market. We simply immerse the estimator in fixer or hypo solution and match the colour of the estimator with the colours in the chart that comes with the estimator. In front of each colour is given the silver content per litre.
Another method is to take one litre sample of hypo and fixer solution and precipitate silver from it, solidify that silver and weigh it, and that way you can assess the exact silver recovery from the whole lot of silver solution.
To know more about it and the silver recovery process, please click the link below:
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