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ments of the grade specifications set forth in Table I: And further provided, That each of the samples which repre

sent a specific lot of refiners' sirup meet the limiting specifications set forth in Table II of this paragraph.

TABLE II-TABLE OF LIMITING SPECIFICATIONS FOR REFINERS' SIRUP

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DETERMINATION OF FACTORS $ 52.6044 Quantitative determination of

factors. Quantitative determination of the respective factors other than color is made by the methods set forth in this section for the respective factors: '

(al Brix solids. By Brix hydrometer, correcting to 20° C. (68° F.), using the double dilution method.

(b) Total sugars-(1) Sucrose. By the chemical method, using invertase as the inverting agent; the Lane-Eynon volumetric method for reducing sugars before and after inversion; or by Jackson-Gillis double polarization method number IV.

(2) Reducing sugar. By the LaneEynon volumetric method, or by the Munson-Walker gravimetric method.

(c) Sulfated ash. By the sulfation method, with no deduction. $ 52.6045 Preparation of basic solutions

and RS color standards. Chemicals of reagent grade, at room temperature, are used in the preparation of the solutions described in this section.

(a) Preparation of basic solutions (1) Solution A. Dissolve 10 grams of CuCl, 2H,O in a sufficient quantity of 10

percent hydrochloric acid solution to make 100 milliliters. *

(2) Solution B. Dissolve 50 grams of CoCl2.6H,O in a sufficient quantity of 10 percent hydrochloric acid solution to make 500 milliliters.

(3) Solution C. Dissolve 50 grams of FeCl, 6H2O in a sufficient quantity of 10 percent hydrochloric acid solution to make 500 milliliters

(4) RS stock solution. Mix 50 milliliters of Solution A and 485 milliliters of Solution B with 465 milliliters of Solution c.

(b) Preparation of RS color standards—(1) RS Color Standard No. 1. Dilute 10 milliliters of the RS stock solution to 100 milliliters with 10 percent hydrochloric acid solution.

(2) RS Color Standard No. 2. Dilute 18 milliliters of the RS stock solution to 100 milliliters with 10 percent hydrochloric acid solution.

(3) RS Color Standard No. 3. Dilute 50 milliliters of RS stock solution to 100 milliliters with 10 percent hydrochloric acid solution. $ 52.6046 Use of RS color standards in

determining color factor. (a) Containers required. The containers needed to perform the visual color comparison test set forth in paragraph (c) of this section are:

(1) A container for a sample of refiners' sirup for which the color factor

. These methods are described in Official Methods of Analysis of the Association of Official Agricultural Chemists, Seventh Edi. tion, 1950, except the Jackson-Gillis double polarization method number IV is described in Circular C440, Nat. Bur. Standards, May 1942, or in the Sugar Analysis, by Browne and Zerban, 3d Edition, 1948, John Wiley & Sons, Inc.

8 Ten percent hydrochloric acid solution 18 prepared by diluting 242.6 milliliters of reagent grade hydrochloric acid to one Uter.

(a) “U.S. Fancy" or "U.S. Grade A" sirup which possess a flavor characterRefiners' Sirup.

istic of refiners' sirup of standard qual. (b) “U.S. Choice” or “U.S. Grade B" ity; which contains no excess of sediRefiners' Sirup.

ment; which is practically free of foreign (c) “U.S. Extra Standard" or "U.S. matter; which has a Brix solids content Grade C” Refiners' Sirup.

of not less than 76 percent when cor(d) “U.S. Standard” or “U.S. Grade rected to 20° C. (68° F.); which has a D” Refiners' Sirup.

ratio of total sugars (sucrose plus reduc(e) “U.S. Substandard” or “U.S. Grade ing sugars) to Brix solids of not less than E” Refiners' Sirup.

78 percent; which has a ratio of sulfated

ash to Brix solids of not more than 10 § 52.6043 Grade specifications.

percent; and which possesses a color no Specifications for each grade of re- darker than RS Color Standard No. 3. finers' sirup are as follows:

(d) U.S. Standard or U.S. Grade D (a) U.S. Fancy or U.S. Grade A Re- Refiners' Sirup consists of refiners' sirup finers' Sirup consists of refiners' sirup which possesses a flavor characteristic which possesses a flavor characteristic of refiners' sirup of standard quality; of refiners' sirup of fancy quality; which which contains no excess of sediment; contains no sediment; which is free of which is practically free of foreign matforeign matter; which has a Brix solids ter; which has a Brix solids content of content of not less than 72 percent when not less than 76 percent when corrected corrected to 20° C. (68° F.); which has to 20° C. (68° F): which has a ratio of a ratio of total sugars (sucrose plus re- total sugars (sucrose plus reducing sugducing sugars) to Brix solids of not less ars) to Brix solids of not less than 70 than 92 percent; which has a ratio of percent; and which has a ratio of sulsulfated ash to Brix solids of not more fated ash to Brix solids of not more than than 3.0 percent; and which possesses a 14 percent. color no darker than RS Color Standard (e) U.S. Substandard or U.S. Grade No. 1.

E Refiners' Sirup consists of refiners' (b) U.S. Choice or U.S. Grade B Re sirup that fails to meet the specifications finers' Sirup consists of refiners' sirup for U.S. Standard Refiners' Sirup. which possesses a flavor characteristic of (f) Table of specifications for grades. refiners' sirup of choice quality; which The specifications for the designated contains no sediment; which is free of

grades of refiners' sirup are set forth in foreign matter; which has a Brix solids

summary form in Table I of this paracontent of not less than 72 percent when

graph. corrected to 20° C. (68° F.); which has a

(g) Tolerances for certification of ofiratio of total sugars (sucrose plus re

cially drawn samples. When certifying ducing sugars) to Brix solids of not less

samples that have been officially drawn than 86 percent; which has a ratio of sulfated ash to Brix solids of not more

and which represent a specific lot of than 6 percent; and which possesses &

refiners' sirup, the grade for such lot color no darker than RS Color Standard

will be determined by averaging the facNo. 2.

tors of all the samples representing the (c) U.S. Extra Standard or U.S. Grade lot: Provided, That not more than 46 of C Refiners' Sirup consists of refiners' such samples fail to meet the require

TABLE I–TABLE OF SPECIFICATIONS FOR GRADES

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Not less than 76 percent | Not less than 78 Not less than 70 percent.

Brix solids corrected to

20° C. (68° F.). Ratio of total sugars

(sucrose plus reducing

sugars) to Brix solids. Ratio of sulfated ash to

Brix solids.
Color....

Not less than 72 percent
Not less than 92 Not less than 86
percent.

percent.
Not more than 3 Not more than 6
percent.

percent.
No darker than RS No darker than RS

Color Standard Color Standard
No. 1.

No. 2.

percent. Not more than 10 Not more than 14 percent.

percent.
No darker than RS No color limit.

Color Standard
No. 3.

ments of the grade specifications set forth in Table I: And further provided, That each of the samples which repre

sent a specific lot of refiners' sirup meet the limiting specifications set forth in Table II of this paragraph.

TABLE II-TABLE OF LIMITING SPECIFICATIONS FOB REFINERS' SIRUP

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Ratio of total sugars

(sucrose plus reducing sugars) to Brix solids. Ratio of sulfated ash to

Brix solids. Color...

Not less than 91 Not less than 85 Not less than 77 Not less than 69
percent.
percent.
percent.

percent.
Not more than 3.5

Not more than 11 | Not more than 15 percent. percent.

percent.

I percent.
No darker than RS | No darker than RS | Darker than RS Color Standard No. 3.

Color Standard Color Standard
No. 2.

No. 3.

DETERMINATION OF FACTORS percent hydrochloric acid solution to $ 52.6044 Quantitative determination of

make 100 milliliters.'

(2) Solution B. Dissolve 50 grams of factors.

CoCl2.6H2O in a sufficient quantity of 10 Quantitative determination of the re

percent hydrochloric acid solution to spective factors other than color is made

make 500 milliliters. by the methods set forth in this section

(3) Solution C. Dissolve 50 grams of for the respective factors: '

FeCl.-6H,O in a sufficient quantity of 10 (al Brix solids. By Brix hydrometer,

percent hydrochloric acid solution to correcting to 20° C. (68° F.), using the

make 500 milliliters. double dilution method. (b) Total sugars-(1) Sucrose. By

(4) RS stock solution. Mix 50 millithe chemical method, using invertase as

liters of Solution A and 485 milliliters of the inverting agent; the Lane-Eynon

Solution B with 465 milliliters of Soluvolumetric method for reducing sugars

tion C.

(b) Preparation of RS color standbefore and after inversion; or by Jackson-Gillis double polarization method

ards—(1) RS Color Standard No. 1. number IV.

Dilute 10 milliliters of the RS stock solu(2) Reducing sugar. By the Lane

tion to 100 milliliters with 10 percent Eynon volumetric method, or by the

hydrochloric acid solution. Munson-Walker gravimetric method.

(2) RS Color Standard No. 2. Dilute (c) Sulfated ash. By the sulfation

18 milliliters of the RS stock solution to method, with no deduction.

100 milliliters with 10 percent hydro

chloric acid solution. $ 52.6045 Preparation of basic solutions

(3) RS Color Standard No. 3. Dilute and RS color standards.

50 milliliters of RS stock solution to 100 Chemicals of reagent grade, at room milliliters with 10 percent hydrochloric temperature, are used in the preparation acid solution. of the solutions described in this section. (a) Preparation of basic solutions

8 52.6046 Use of RS color standards in (1) Solution A. Dissolve 10 grams of

determining color factor. CuCl, 2H,0 in a sufficient quantity of 10

(a) Containers required. The con

tainers needed to perform the visual These methods are described in Official color comparison test set forth in paraMethods of Analysis of the Association of

graph (c) of this section are: Official Agricultural Chemists, Seventh Edi

(1) A container for a sample of retion, 1950, except the Jackson-Gillis double polarization method number IV is described

finers' sirup for which the color factor in Circular C440, Nat. Bur. Standards, May 1942, or in the Sugar Analysis, by Browne 8 Ten percent hydrochloric acid solution 18 and Zerban, 3d Edition, 1948, John Wiley & prepared by diluting 242.6 milliliters of reSons, Inc.

agent grade hydrochloric acid to ono Uter.

is to be determined (such container here. inafter called "sample container"); and

(2) Containers for the respective RS color standards.

(b) Description of containers. The sample container is made of colorless and transparent glass or plastic material and is of such shape and construction as to provide a flat 4-inch thickness of the sample to be viewed. The container for each RS color standard is a colorless and transparent 2-ounce French square water sample bottle having outside base dimensions of 176 inches by 1716 inches.

(c) Visual comparison test. A sample of refiners' sirup is compared in the following manner with the RS color standards to determine whether the sample is darker than one or more of such color standards:

(1) Place each of the RS Color Standards Nos. 1, 2, and 3 in separate 2-ounce French square water sample bottles;

(2) Place a sample of the refiners' sirup in a sample container; and

(3) In order to determine whether the sample is darker than one or more of the RS color standards, visually compare the sample with each of the color standards by looking through them at & light-colored background in diffuse light. The sample is viewed through its 48-inch thickness; and each RS color standard is viewed at right angles to one of the sides of its container. Subpart-United States Standards for

Grades of Canned Leafy Greens SOURCE: 88 52.6081 to 52.6094 appear at 33 F.R. 5741, Apr. 13, 1968, unless otherwise noted.

PRODUCT DESCRIPTION $ 52.6081 Product description.

(a) “Canned Leafy Greens” (other than spinach), means the product properly prepared from the succulent leaves of any one of the plants listed under 8 52.6082 “Types" and packed with the addition of water in hermetically sealed containers and sufficiently processed by heat to prevent spoilage. The products may be acidified and/or seasoned with one or more of the acidifying or seasoning ingredients and in a quantity permitted under the Federal Food, Drug, and Cosmetic Act.

TYPES, STYLES, AND GRADES $ 52.6082 Types.

(a) The following types are defined under the Standards of Identity for Canned Vegetables (21 CFR 51.990) 1ssued pursuant to the Federal Food, Drug, and Cosmetic Act:

(1) Collards.
(2) Kale.
(3) Mustard greens.
(4) Turnip greens.

(b) Other types included in this subpart, but not covered by the Standards of Identity for Canned Vegetables are:

(1) Mixed leafy greens-consists of a substantial mixture of any two of the types listed in paragraph (a) of this section.

(2) Poke salad-consists of leaves and adjoining stem of the pokeberry plant (phytolocca Americana). $ 52.6083 Styles.

(a) “Whole leaf” consists substantially of the whole leaf and adjoining portion of stem.

(b) “Cut” or "sliced" consists of the leaves and adjoining portion of stem that has been cut predominantly into large pieces approximating 34 inch or more in the longest dimension or cut predomi. nantly into approximate strips.

(c) “Chopped” consists of the leaves and adjoining portions of the stem that have been cut predominantly into small pieces less than approximately 34 inch in the longest dimension. § 52.6084 Grades.

(a) “U.S. Grade A" (or "U.S. Fancy'') is the quality of the product that has & good flavor and odor characteristic of the type and has an attractive appearance and eating quality within the limitations as specified in the subpart with respect to: (1) Color; (2) character; (3) damage; and (4) harmless extraneous material.

(b) “U.S. Grade B” (or “U.S. Extra Standard") is the quality of the product that has a good flavor and odor characteristic of the type and has a reasonably attractive appearance and eating quality within the limitations as specified in the subpart with respect to: (1) Color; (2) character; (3) damage; and (4) harmless extraneous material.

(c) "Substandard" is the quality of the product that fails to meet the requirements for “U.S. Grade B."

DEFINITIONS OF TERMS AND SYMBOLS as such, is not a factor of quality for the

purpose of these grades. The recom& 52.6085 Definitions of terms and

mended fill of container for canned leafy symbols.

greens is the maximum amount of (a) Terms.

product that can be sealed in & conDetect--------- Any specifically defined

tainer and processed by heat to a point variation from a partio of proper sterilization without impairular requirement.

ment of quality. It is recommended that Deviant.

A sample unit that exceeds the product and packing medium occupy an upper limit (such as

not less than 90 percent of the water for various defect classi. fications) or falls to

capacity of the container. meet a lower limit (such RECOMMENDED DRAINED WEIGHTS

as drained weights). Sample ------- Any number of sample § 52.6087 Recommended drained units to be used for

weights. Inspection of a lot.

(a) General. The recommended drained Sample unit---- The entire contents of a container, & portion of

weight values in Table I of this subpart the contents of a con

are not incorporated in the grades of tainer or a combination the finished product, since drained of the contents of two weight, as such, is not a factor of quality or more containers as for the purpose of these grades. specified to be used for

(b) Method for ascertaining drained inspection. Sample average

weight. (1) The drained weight of The numerical value calvalue. culated by dividing tho

canned leafy greens is determined when total number of appli

the product is at approximately room cablo defects in a sam temperature (68° F.). The contents of plo by the total number the containers are emptied upon a dry, of sample units in that previously weighed U.S. Standard No. 8 sample.

circular sieve of proper diameter con(b) Symbols.

taining 8 meshes to the inch (0.0937, Minimum sample averago

+3 percent, square openings). With the

sieve flat on the tray, the container of drained weight. L-------- Lower limit for individual

product is placed open end down in the drained weights.

sieve in an upright position. The conUpper limit is the value tainer is Lifted off the product without

which represents tho spreading the product out on the sieve. maximum number of do The product is allowed to drain for exfects & sample unit may

actly two minutes. The weight of the havo for a grade classi

product and sieve minus the weight of fication.

the dry sieve is the drained weight of FILL OF CONTAINER

the product.

(2) A sieve 8 inches in diameter is used 8 52.6086 Recommended fill of container.

for the equivalent of & No. 3 size can

(404 x 700) and smaller and a sieve 12 The recommended fill of container is inches in diameter is used for containers not incorporated in the grades of the larger than the equivalent of a No. 3 finished product since fill of container, size can.

TABLE I. RECOMMENDED MINIMUM DRAINED WEIGHTS TOR CANNED LEAFY GREENS

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