Details of the WHO Environmental Health Criteria Programme, including definitions of some of the terms used in the documents, may be found in the general introduction to the Environmental Health Criteria Programme, published together with the environmental health criteria document on mercury Environmental Health Criteria I M Mercury, Geneva, World Health Organization, and now available as a reprint.
Organometallic compounds of tin 2. In addition, experts in any particular field dealt with in the criteria documents are kindly requested to make available to the WHO Secretariat any important published information that may have inadvertently been omitted and which may change the evaluation of health risks from exposure to the environmental agent under examination, so that the information may be considered in the event of updating and re-evaluation of the conclusions contained in the criteria documents.
Effects on the blood-forming organs 7. Concentrations of tin in air are often below the detection limits and, when detected, the levels are generally below 0. Determination of inorganic tin 2. Absorbed tin leaves the vascular system rapidly. There is no conclusive evidence concerning the carcinogenicity or teratogenicity of inorganic tin.
From the available information, it appears that bioconcentration of tin and organotin compounds of a magnitude that might endanger life or the environment is unlikely to occur. Effects on lymphatic tissue and immunological effects 7.
Vomiting and diarrhoea are typical signs that follow oral intake of foods with a high tin content. Draft preliminary reviews are not submitted for comments to the national focal points for the WHO Environmental Health Criteria Programme.
Errors and omissions excepted, the names of proprietary products are distinguished by initial capital letters.
Pesticide residues have been determined by spectroscopic methods and gas-liquid or thin-layer chromatography. Workers involved in the processing of di- and trisubstituted organotin compounds may be subject to excessive exposure from time to time.
The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of the Secretariat of the World Health Organization concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.
Workers spraying fields or treating plants with trialkyl- or triaryltin compounds may also run the risk of exposure to these compounds. Inorganic tin compounds 7. Disubstituted organotin compounds R2SnX2 are mainly used in the plastics industry, particularly as stabilizers in poly vinyl chloride.
The first draft of the present document was prepared by Dr L. Recommendations for further studies 1. Tin has not always been found in soils and plants; however, it is possible that in some cases, concentrations have been below the detection limits.
Effective doses and dose rates 7. As far as distribution is concerned, the highest concentrations in rats, guineapigs, rabbits, and hamsters have mostly been detected in the liver. Martin, formerly Principal Medical Officer, Department of Health and Social Security, London, England, assisted the Secretariat in the preparation of a revised first draft, which was circulated to the members of the Task Group prior to the meeting.
Absorbed inorganic tin is mainly excreted in the urine.
However, reliable methods have still to be developed for the quantitative extraction, separation, and determination of many individual tin species in mixtures containing both inorganic tin and organotin compounds that may occur in various media.
Some foods such as asparagus, tomatoes, fruits, and their juices tend to contain high concentrations of tin if stored in unlaquered cans. However, several publications reviewing the health effects of inorganic and organotin compounds have also been used. Effects on the liver and bile duct 7.
Chemistry and uses of tin compounds 1. Effects on reproduction and the fetus 7.本词汇表版权为有限会社MSC所有,欢迎使用。 船舶配件贸易分类==> Main Ship Equipments | Equipment Types | Main Marine Manufacturers Ship Spare Parts, =1=A=B=C=D=E=F=G=H=I=J=K=L=M=N=O=P=Q=R=S=T=U=V=W=X=Y=Z= 女性肖像, by H.
Nakajima | 燃料弁噴射テスト装置 | 油圧ポンプユニット | フラットソケット 化. Determination of Cobalt Oxalate Hydtrate Introduction The objective of this lab is for students to determine the percentage of cobalt oxalate hydrate using the gravimetric analysis. Laboratory Contents and Materials - The contents and order are subject to change from semester to semester.
- (Online Lab Report) The Density: Aluminum, Sand(Omit), Salt (Omit) d = m/V Introduction to Synthesis & Analysis of Cobalt Oxalate Hydrate.
Reference: Exp #10 & #12 Synthesis and Analysis of Cobalt Oxalate Hydrate. A selector tool to be used by suppliers and buying organisations preparing a catalogue for upload into PECOS; Updated on 10th September for use with Excel INTERNATIONAL PROGRAMME ON CHEMICAL SAFETY ENVIRONMENTAL HEALTH CRITERIA 15 TIN AND ORGANOTIN COMPOUNDS A Preliminary Review This report contains the collective views of an international group of experts and does not necessarily represent the decisions or the stated policy of either the World Health Organization or.
The purpose of this lab was to determine the percent cobalt and oxalate by mass, and with that information, the empirical formula for cobalt oxalate hydrate, using the general formula Coa(C2O4)killarney10mile.com2O.Download