This sampling procedure is applicable to paste, liquid, or powder detergents and fatty alkyl sulfates. Sampling preparation for analysis. Use Apparatus or Sampling Equipment
(i) Trier for paste soaps a half-round metal tube ½ to 1 inch in diameter. The length may be 2 – 4 feet depending upon the size of the packing to be sampled. One end is tapered to a point, and the taper to be not more than 1 inch long. The other end is attached to a D or T-shaped handle.
Sample tube for liquid products a glass tube or road 3/8 to ½ inch inside diameter. The length may be convenient for the size of packages to be sampled. One end is constricted by a shot taper (not more than 1 inch long) to ¼ inch. The other end is constricted sufficiently so that it can be used as a finger valve.
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(ii ) Air-tight and water sample containers 2lb capacity.
(iii) Airtight and water sample containers, sufficient capacity to hold samples taken as directed in B, a,b, and c.
(iv) Spatula size to 10 or 12-inch blade.
Sample Preparation Procedure
Note:- Place all samples in air-tight and water-tight containers and cover and seal to prevent any moisture change. Label completely for identification and send to the laboratory for preparation and analysis.
Powder and Flakes packed in cans or cartons
One can or carton shall be taken at random from not less than 1% of the seller s shipping containers, provided each package contains not less than 22.7 kg. In the case of smaller containers, a can or carton shall be taken at random from each lot of containers, totaling not more than 5000lb (2268 kg) or a fraction thereof. The gross sample shall be in all cases consist of not less than three cans or cartons taken at random from separate containers. In the case of very large lots where the sample drawn as above will amount to more than 20lb (9.1 kg), the percentage of packages sampled shall be reduced so that the amount drawn will not exceed 20lb (9.1 kg).
The individual cans or cartons shall be tightly wrapped at once in paraffined paper and sealed by rubbing the edges with a heated iron. The inspector shall accurately weigh each wrapped can or carton and record its weight and the date of weighing on the wrapper. The wrapped cans or cantons shall be placed in an air-tight container, which should be nearly filled and which shall then be scaled, marked, and sent to the laboratory for test. Samples shall be kept cool until tested.
Powder and Flakes in Bulk
A grab sample of not less than 0.5 lb (227 gm) shall be taken at random from not less than 1% of the seller’s shipping containers, provided each package contains not less than 100 lb (45.4kg). In the case of smaller containers, a grab sample of not less than 0.5 lb (227gm) shall be taken at random from each lot of containers totaling not more than 10,000lb (4536kg) or a fraction thereof. The gross sample shall in all cases consist of not less than three grab samples of 0.5 lb (227 gm) each taken at random from separate containers.
In the case of very large lots where the sample drawn as above will amount to more than 20 lb (9.1 kg), the percentage of packages sampled shall be reduced so that the amount drawn shall not exceed 20 lb (9.1kg). The inspector shall rapidly mix the gross sample and place it in an airtight container which shall be filled sealed, marked, and accurately weighed, with its weight and date of weighing recorded on the package, and be sent to the laboratory for test. A sample shall be kept cool until tested.
Liquid Material
A sample of not less than 236.6 ml shall be taken at random from not less than 1% of the seller’s shipping containers, provided each package contains not less than 10 gallons (37.9 liters). In the case of smaller containers, a sample of not less than 0.5 pt. (236.6 ml) shall be taken at random from each lot of containers totaling not more than 1000 gallons (3785 liters) or a fraction thereof.
The gross sample shall in all cases consist of not less than a free sample of 236.6 ml each take at random from separate containers. Before drawing the sample from the container selected, the contents of the container shall be thoroughly agitated. The inspector shall thoroughly mix the gross sample, and place it in clean and dry cans or bottles, which shall be completely filled and securely stopped with clean corks or caps then sealed, marked, and sent to the laboratory for test.
Pastes Material
# Pastes packed in cans or cartons of 5 lb (2.27 kg) or less. One can or carton shall be taken at random from not less than 1% of the seller’s shipping containers, provided each package contains not less than 50 lb (22.7 kg). In the case of smaller containers, a can or carton shall be more than 5000 lb (2268 kg.) or a fraction thereof.
Paste Packed in Bulk.
A “Trier” sample of not less than 0.5 lb (227gm.) shall be taken at random from not less than 1% of the seller's shipping containers, provided each package contains not less than 50 lb (22.7 kg). In the case of smaller containers, a “Trier” sample of not less than 0.5 lb (277 gm) shall be taken at random from each lot of containers totaling not more than 5000 lb (2268 kg) or a fraction thereof. The gross sample shall in all cases consist of not less than three 0.5 lb samples, each taken at random from separate containers.
(*) A trier sample is obtained by inserting a “Trier” into the material. A trier is a half-round steel cylinder ½ to ¾ inch in diameter, 6.0 – 36 inches in length, pointed on one end, and has a grip handle on the other end. After insertion, the trier is turned two or three times, and upon removal, a core of the material being sampled is obtained.
Laboratory sample preparation for analysis
For Powders
and Flakes
Minimizing exposure to air, rapidly disintegrate and mix the sample of powdered, flake, or chip product. If desired, quarter down to about 1 lb. (453.6 gm.). Weigh all portions for analysis, preserving the remainder in an airtight container in a cool place.
For Liquid sample
No preparation of the sample of liquid, other than a thorough mixing, is necessary unless it is received during very cold weather, when it should be allowed to stand at least 1 hr. after it has warmed to room temperature (20 °C – 30 °C) before it is tested, particularly for its lathering qualities. (Note -1)
For Pastes sample
Store preferably in the glass. If crystals separate, melt in a water bath. Note 1: - If pastes or liquids are known to be acidic, the sample decomposition of a sample can result from heating; the samples shall be adequately labeled for precautionary treatment and warmed to room temperature or other maximum temperature as agreed upon for mixing and sampling.
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