[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
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN
SERVICES (CONTINUED)
PART 137_CEREAL FLOURS AND RELATED PRODUCTS--Table of Contents
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://
www.archives.gov/federal--register/code--of--federal--regulations/ibr--
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
sample.
(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: |
