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137.270 Self-rising white corn meal.

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[Code of Federal Regulations]
[Title 21, Volume 2]
[Revised as of April 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR137.270]

[Page 381-382]
                        TITLE 21--FOOD AND DRUGS
                          SERVICES (CONTINUED)
   Subpart B_Requirements for Specific Standardized Cereal Flours and 
                            Related Products
Sec.  137.270  Self-rising white corn meal.

    (a) Self-rising white corn meal is an intimate mixture of white corn 
meal, sodium bicarbonate, and one or both of the acid-reacting 
substances monocalcium phosphate and sodium aluminum phosphate. It is 
seasoned with salt. When it is tested by the method prescribed in 
paragraph (b) of this section, not less than 0.5 percent of carbon 
dioxide is evolved. The acid-reacting substance is added in sufficient 
quantity to neutralize the sodium bicarbonate. The combined weight of 
such acid-reacting substance and sodium bicarbonate is not more than 4.5 
parts to each 100 parts of white corn meal used.
    (b) The method referred to in paragraph (a) of this section is the 
method prescribed in ``Official Methods of Analysis of the Association 
of Official Analytical Chemists'' (AOAC), 13th Ed. (1980), section 
8.002, ``Reagent (Displacement soln.),'' and section 8.003, ``Chittick 
apparatus,'' under the heading ``Total Carbon Dioxide (1)--Official 
Final Action,'' which is incorporated by reference. Copies may be 
obtained from the AOAC INTERNATIONAL, 481 North Frederick Ave., suite 
500, Gaithersburg, MD 20877, or may be examined at the National Archives 
and Records Administration (NARA). For information on the availability 
of this material at NARA, call 202-741-6030, or go to: http://
locations.html. The following procedure is substituted for the procedure 
specified in the AOAC, under section 8.004, ``Determination'':
    (1) Weigh 17 grams of the official sample into flask A, add 15-20 
glass beads (4-6 mm. diameter), and connect this flask with the 
apparatus (fig. 25). Open stopcock C and by means of the leveling bulk E 
bring the displacement solution to the 25 cc. graduation above the zero 
mark. (This 25 cc. is a partial allowance for the volume of acid to be 
used in the decomposition.) Allow the apparatus to stand 1-2 minutes to 
insure that the temperature and pressure within the apparatus are the 
same as those of the room. Close the stopcock, lower the leveling bulb 
somewhat to reduce the pressure within the apparatus, and slowly run 
into the decomposition flask from burette F 45 cc. of sulfuric acid 
(1+5). To prevent the liberated carbon dioxide from escaping through the

[[Page 382]]

acid burette into the air keep the displacement solution in the leveling 
bulb at all times during the decomposition at a lower level than that in 
the gas-measuring tube. Rotate and then vigorously agitate the 
decomposition flask for 3 minutes to mix the contents intimately. Allow 
to stand for 10 minutes to bring to equilibrium. Equalize the pressure 
in the measuring tube by means of the leveling bulb and read the volume 
of gas from the zero point on the tube. Deduct 20 cc. from this reading 
(this 20 cc. together with previous allowance of 25 cc. compensates for 
the 45 cc. acid used in the decomposition). Observe the temperature of 
the air surrounding the apparatus and also the barometric pressure and 
multiply the number of mL of gas evolved by the factor given in the 
AOAC, 13th Ed. (1980), section 52.007 under Reference Tables for the 
temperature and pressure observed, which is incorporated by reference. 
The availability of this incorporation by reference is given in 
paragraph (b) of this section. Divide the corrected reading by 100 to 
obtain the apparent percent by weight of carbon dioxide in the official 
    (2) Correct the apparent percent of carbon dioxide to compensate for 
varying atmospheric conditions by immediately assaying a synthetic 
sample by the same method in the same apparatus.
    (3) Prepare the synthetic sample with 16.2 grams of corn meal, 0.30 
gram of monocalcium phosphate, 0.30 gram of salt, and a sufficient 
quantity of sodium bicarbonate U.S.P. (dried over sulfuric acid) to 
yield the amount of carbon dioxide recovered in assay of official 
sample. Determine this quantity by multiplying weight of carbon dioxide 
recovered in assay of official sample by 1.91.
    (4) Divide the weight of carbon dioxide recovered from synthetic 
sample by weight of carbon dioxide contained in sodium bicarbonate used.
    (5) Divide the quotient into the apparent percent of carbon dioxide 
in official sample to obtain percent of carbon dioxide evolved from the 
official sample.
    (c) Label declaration. Each of the ingredients used in the food 
shall be declared on the label as required by the applicable sections of 
parts 101 and 130 of this chapter.

[42 FR 14402, Mar. 15, 1977, as amended at 47 FR 11828, Mar. 19, 1982; 
49 FR 10098, Mar. 19, 1984; 54 FR 24894, June 12, 1989; 58 FR 2878, Jan. 
6, 1993]

Additives that reference this regulation:

Source: U.S. Code of Federal Regulations - CFR Title 21, Part 137, Section 270

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