tropics
...Thank you. For my current 17 pound batch, that means 19.21 total grams of curing salt, which is 4.57 teaspoons. If I only used 1/8 teaspoon per pound (Total 2-1/2 teaspoons)on my current batch, will it turn out safely?
The USDA limit of NaNO2 in "dry cured products, such as country ham, country style pork shoulder, prosciutto, etc. is 625ppm. This translates to ~4.5g Cure#1 (~3/4 teaspoons) per pound of meat. See pages
24-27 of the USDA FSIS Processing inspectors' calculations handbook.
For Dry Cured Bacon, the limit is 200ppm. This translates to ~1.45g Cure#1 per pound of meat. See pages
27-31
Converting units and calculating your recipe according to the equation on page 24:
1/8 teaspoon ~ 0.70g Cure #1
0.70g * 0.0625 = 0.044g NaNO2
1 pound meat = 454 g
NaNO2 ppm = 1000000 * 0.044g * (0.70g/454g) / 0.70 = 96 ppm
(This is assuming that the meat is skin off. With skin on, factor a 10% correction; i.e., 0.9*454g = 409g).
“As a matter of policy, the [USDA] requires a minimum of 120 ppm of ingoing nitrite in all cured ‘Keep Refrigerated’ products...There is no regulatory minimum ingoing nitrite level for cured products that have been processed to ensure their shelf stability...However, 40 ppm nitrite is useful in that it has some preservative effect.”
page 12
*Note, USDA sodium nitrite legal limits depend on the processing method and cut of meat:
156ppm NaNO2 for Comminuted products (e.g., sausages)
200ppm NaNO2 for Immersion/pumped (other than bacon)
625ppm NaNO2 for Dry cured (Hams, prosciutto. etc)
120ppm NaNO2 for Immersion/pumped bacon
200ppm NaNO2 for Dry cured bacon