[Report of the Medical Officer of Health for Port of London] page 51

City of London 1934

[Report of the Medical Officer of Health for Port of London]

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Date. 1934.	Sample.	Result of Analysis.		Action taken.
July 6	Apricots (2)	In the case of the blown tin the tin compounds present were found to be equivalent to 3.6 grains of tin per pound. The gases in the tin were collected and measured 86.5 ccm., of which 81.5 ccm., or 954 per cent., was carbon dioxide. In the case of the apparently sound tin, the tin compounds were found to be equivalent to 0.25 grains of tin per pound.		Blown tins destroyed, remainder released.
„ 6	Apricots in brine	This sample on examination was found to contain 630 parts of sulphur dioxide per million.		None.
„ 6	Sardines	This sample on examination was found to contain 18 parts of lead per million.		Warning letter to Importers.
„ 12	Sweets	Free from the presence of poisonous metals and prohibited colouring matter.		None.
„ 12	Apricot Pulp	This sample contained 1,240 parts of sulphur dioxide per million.		None.
„ 12	Cherries	This sample contained 2,255 parts of sulphur dioxide per million.		None.
„ 16	Cauliflowers in brine	Free from the presence of sulphur dioxide.		None.
„ 16	Sardines (2)	These samples on examination gave the following results:—		Consignment to be exported.
		Sample.	Lead, parts per million.
		Small tin	60
		Large tin	56
„ 16	Pineapple Chunks in water (2).	These samples on examination gave the following results:— Blown can:—This sample was found to contain tin and tin compounds equivalent to 0.2 grains of tin per pound. On opening the can 69 ccs. of gases were collected, of which 45% proved to be carbon dioxide. The contents of the tin were badly fermented. Unblown can:—This sample was found to contain tin and tin compounds equivalent to 0.25 grains of tin per pound. In the case of this tin the contents showed signs of fermentation and the fruit was somewhat tasteless. The liquor contained 2.17% of proof spirit and some yeast cells were detected under the microscope. With regard to the solder points, the punctures in these covers have been made in each case from without. What has probably happened is that both tins have been blown twice and both were punctured and the gas released when the first blowing occurred. When the second blowing took place, only the second tin was punctured, quite probably the first can did not show signs of a big blow at the time.		All tins with more than one solder point destroyed.
„ 20	Sardines	This sample on examination was found to contain 7 parts of lead per million.		None.
„ 20	Sardines	This sample on examination was found to contain 13 parts of lead per million.		None.
» 20	Sausage	This sample was found to be free from the presence of preservatives and prohibited colouring matter.		None.
„ 20	Tomato Puree	This sample was found to be free from the presence of preservatives and prohibited colouring matter.		None.
„ 20	Tunny Fish (2)	These samples on examination gave the following results:—		None.
		Sample.	Lead, parts per million.
		Conservas Alba	11
		A.P	3
„ 23	Anchovies	This sample contained 2 parts of lead per million		None.
„ 25	Pineapple (Liquor)	On arrival fermentation had started and proceeded actively for two days. The sample as received had 1.73% of proof spirit. With regard to the two tins with one solder point only in each case, I have been unable to find any estimable quantity of alcohol in these, and, although there was a slight odour of fermentation on opening the cans, I cannot obtain any definite chemical confirmation of this.		(See Report of July 16th on Pineapple Chunks in Water.)