![]() We watch and revel in movies or games that glorify sexual filth – sometimes even living vicariously through them or we read trashy romance novels (perhaps reading certain explicit sections over and over again) all the while patting ourselves on the back for our purity in that we are not doing those things. This may allow us to keep our pledge to abstinence, but not any kind of pledge to purity. We think that if God has part of our hearts that we are entitled to hold on to the rest for ourselves and our own plans and desires. We are willing to allow God control over one or maybe even several compartments, but we try and hold on to a few of them just or us. If our entire lives are to be a sacrifice of worship to God, how much more should WE be as pure, spotless and clean as the animal sacrifices required in the OT worship! So many times we think we can separate our lives into compartments: “Therefore I urge you, brethren, by the mercies of God, to present your bodies a living and holy sacrifice, acceptable to God, which is your spiritual service of worship.” Anything less than that was unacceptable to the Holy and Perfect God. Purity was essential in all of the sacrifices – meaning the sacrifice had to be physically perfect, without blemish or fault. Purity, according to biblical language, is to be morally clean, without blemish. I will be addressing this here because it is something that each and every one of us, not just hormonally abundant teenagers, must address in our own hearts and lives before the Lord. Please do not get me wrong abstinence is a good thing, but it is just one part, and a small one at that, of what true biblical purity is all about. Abstaining from sexual relations is not the same thing as purity. Most of these pledges are just about sexual abstinence. The idea of pledging yourself to purity is a good thing but I am afraid that it leaves a misunderstanding in your heart when you have taken such a pledge. Many churches have purity pledges, some of you may have taken them in your youth groups as teens or your teenagers now may be being asked to take them. LC can be performed using High Pressure Liquid Chromatography (HPLC) a very efficient separation mode which requires expensive specialised equipment but the same principles apply to Solid-Phase Extraction (SPE) a low-tech version of liquid chromatography which requires very little in the way of equipment.Īn alternative to chromatography is to use electrophoresis in which the components in a radiopharmaceutical may be separated by their different mobilities in an electric field.There is a great deal of discussion today about purity. ![]() Liquid Chromatography (LC) is an increasingly popular alternative to TLC in which the components are separated down a column by elution with a suitable mobile phase. (Instant thin-layer chromatography or ITLC). The most simple and widely performed procedure uses thin-layer chromatography (TLC) in which the various compounds may be separated because they aredifferentially distributed between a liquid (mobile) phase and a solid (stationary) support mostlyconsisting of silica gel, normally bound to glass-fibre sheets. The most commonly used method is chromatography which separates the different species on thebasis of their differing affinities for a variety of liquid or solid phases. Measurement of RCP requires the use of a method to separate the different labelled chemical specieswhich may be present in the radiopharmaceutical preparation. Radiochemical impurities will have different patterns of biodistribution which may obscure the diagnostic image obtained and render the investgation meaningless. Radiochemical purity is important in radiopharmacy since it is the radiochemical form which determines the biodistribution of the radiopharmaceutical. ![]() Radiochemical purity (RCP) may be defined as "the proportion of the total radioactvity in the sample which is present as the desired radiolabelled species".
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